TOOL LIBRARY

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Explore free tools for text, data, files, calculations, code, and privacy in one place. Search directly or choose a category below.

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Prompt tools

Build clearer, testable, and reusable AI instructions.

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Prompt tools

Prompt Quality Checker

Score goals, context, constraints, and output format with transparent rules.

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Prompt tools

Meta Prompt Builder

Turn a goal into a structured role, process, constraints, and output schema.

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Prompt tools

Token & Context Counter

Estimate text length and token demand without sending it to a model.

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Prompt tools

Few-shot Example Builder

Turn a task and example input-output pairs into a structured prompt.

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Prompt tools

System Prompt / Persona Template

Combine role, tone, operating principles, and boundaries in a professional system prompt.

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Prompt tools

Prompt Template & Variable Filler

Fill reusable prompts containing {{variable}} placeholders safely and consistently.

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Prompt tools

Prompt Test Case Matrix Builder

Build normal, boundary, abuse, and ambiguity test cases for a prompt.

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Prompt tools

Prompt Boundary & Delimiter Builder

Build explicit data boundaries that separate untrusted content from instructions.

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Prompt tools

Structured Output Schema Builder

Turn field definitions into JSON Schema and a model output contract.

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Prompt tools

Prompt Assumption Mapper

Extract hidden assumptions, missing context, and validation questions from an instruction.

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Prompt tools

Prompt Risk Register

Turn ambiguity, data leakage, authority, and failure risks into a scorable register.

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Prompt tools

Prompt Output Contract Tester

Turn expected fields, formatting, and failure behavior into a testable contract.

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Prompt tools

Prompt Variation Lab

Create concise, structured, and boundary-strong prompt variants for one goal.

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Prompt tools

Prompt Compression Assistant

Identify repetition and low-value phrasing to draft a shorter prompt that preserves intent.

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Prompt tools

Instruction Conflict Auditor

Find conflicting requirements, prohibitions, and priorities line by line.

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Prompt tools

Few-shot Dataset Coverage Analyzer

Measure label distribution, duplicate inputs, output collisions, and dataset variety across input → output pairs.

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Prompt tools

Prompt Version Change Summary

Summarize additions, removals, and behavior-risk changes between two prompt versions.

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Prompt tools

Prompt Negative-Constraint Auditor

Find lines where requirements and prohibitions conflict.

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Prompt tools

Prompt Variable Type Checker

Test template variables against example JSON for type and requiredness.

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Prompt tools

Prompt Output Determinism Checker

Expose ambiguous wording and missing output contracts.

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Prompt tools

Prompt Scenario Balance Auditor

Audit normal, boundary, negative, and adversarial cases in a prompt test pack, including class skew and output-format consistency.

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Prompt tools

Prompt Localisation Checklist

Find placeholder, number, URL, and invariant-term loss across languages.

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Prompt tools

Prompt Dependency Graph Builder

Order step dependencies and find missing nodes and cycles.

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Prompt tools

Prompt Rubric Scorer

Score weighted criteria transparently and validate total weight.

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Prompt tools

Prompt Consistency Scenario Test

Find numeric and negation conflicts across rules for the same goal.

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Text & NLP

Inspect structure, readability, and similarity directly on your device.

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Text & NLP

Readability Analyzer

Assess clarity through sentence and word structure.

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Text & NLP

Text Similarity Analyzer

Compare two texts with word overlap and cosine similarity.

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Text & NLP

Text Cleaner

Fix excess whitespace, duplicate lines, and inconsistent formatting.

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Text & NLP

Case Converter

Convert text to sentence, title, uppercase, or lowercase form.

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Text & NLP

Word, Character & Reading Time

Measure content length, paragraphs, and estimated reading time.

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Text & NLP

Text Diff Tool

See added and removed lines or words across two versions.

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Text & NLP

Markdown Previewer

Preview Markdown as safe HTML and inspect the generated code.

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Text & NLP

Local Text Summarizer

Create an explainable sentence summary from long text using local word frequency.

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Text & NLP

Unicode Normalizer & Character Inspector

Inspect NFC/NFD/NFKC/NFKD forms, code points, and invisible characters.

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Text & NLP

Line Sorter & Deduplicator

Sort lines with locale awareness and remove blanks or duplicates explicitly.

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Text & NLP

SEO & URL Slug Generator

Turn titles into stable lowercase URL-safe slugs.

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Text & NLP

Word Frequency & N-gram Analyzer

Find frequent words, bigrams, and trigrams locally.

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Text & NLP

Regex Replacement Lab

Preview capture-group replacements and count changed matches.

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Text & NLP

Grapheme-Safe Text Reverser

Reverse text without breaking emoji or combined characters.

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Text & NLP

Sentence & Paragraph Splitter

Split text into locale-aware sentence and paragraph blocks.

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Text & NLP

SRT Subtitle Time Shifter

Shift SRT timecodes forward or backward with millisecond precision.

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Text & NLP

Unicode Code Point Inspector

Inspect characters by code point, UTF-8 bytes, and visibility.

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Text & NLP

Morse Code Converter

Convert both ways between text and International Morse code.

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Text & NLP

Sentence Simplifier

Flag long sentences, passive constructions, and unnecessary filler with explainable rules.

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Text & NLP

Inclusive Language Reviewer

Find exclusionary or overgeneralized language and create context-aware review notes.

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Text & NLP

Tone Consistency Reviewer

Compare shifts in formality, certainty, and sentiment across text sections.

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Text & NLP

Meeting Notes Structurer

Organize raw notes into agenda, decisions, open questions, owners, and dates.

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Text & NLP

Action Item Extractor

Extract task verbs, likely owners, and dates into an editable action list.

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Text & NLP

Headline Variation Lab

Create headline patterns and a review matrix for clarity, specificity, and length.

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Text & NLP

Citation Placeholder Auditor

Find citation-needed markers, TODOs, and missing-link placeholders with line context.

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Text & NLP

Email List Cleaner

Extract addresses, run a syntax pre-check, and remove duplicates.

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Text & NLP

Safe Filename Converter

Turn titles into clean filenames that work across operating systems.

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Text & NLP

Whitespace Visualizer

Reveal spaces, tabs, line endings, and invisible control characters.

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Text & NLP

Unicode Confusable Scanner

Find mixed-script, zero-width, and bidirectional characters with explainable evidence.

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Text & NLP

Line Ending Converter

Count LF and CRLF endings, detect mixed files, and normalize them safely.

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Text & NLP

Paragraph Outline Extractor

Extract paragraph theses and recurring key concepts locally from long text.

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Text & NLP

Email Subject & Preheader Preview

Preview subject and preheader length against common mobile and desktop truncation ranges.

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Text & NLP

Sentence Length Distribution

Bucket sentence lengths and expose outliers.

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Text & NLP

Repeated Phrase Finder

Find repeated two-to-five-word phrases with frequency and position.

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Text & NLP

List Consistency Checker

Check bullet, numbering, punctuation, and duplication consistency.

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Text & NLP

Punctuation & Quote Normalizer

Normalize quotes, dashes, and spacing to a selected safe style.

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Text & NLP

Acronym Glossary Extractor

Extract uppercase acronyms with first definition and use count.

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Text & NLP

Plain-Language Checker

Find long sentences, jargon, and indirect wording with an explainable score.

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Text & NLP

Heading Hierarchy Auditor

Find Markdown heading jumps, duplicates, and empty headings.

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Text & NLP

Terminology Consistency Checker

Compare preferred terms with disallowed variants.

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Text & NLP

Paragraph Transition Analyzer

Measure connector and topic-continuity signals between paragraphs.

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Text & NLP

Markdown Link Integrity Checker

Find broken references, unsafe schemes, and duplicate definitions in Markdown without network requests.

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Text & NLP

HTML Table Accessibility Checker

Find missing captions, header cells, scope, and complex table relationships in HTML markup.

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Text & NLP

HTML Language & Heading Structure Auditor

Audit HTML lang, title, meta description, a single H1, and heading order together.

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Text & NLP

Email Subject & Preheader Reviewer

Review subject and preheader length, duplication, visible truncation, and clarity signals on-device.

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Data & developer

Handle JSON, CSV, Regex, and encoding tasks quickly.

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Data & developer

JSON Formatter & Validator

Validate, pretty-print, or minify JSON data.

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JSON ↔ CSV Converter

Convert flat object arrays and CSV tables locally.

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Regex Tester

Test regular expressions with matches and groups.

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Data & developer

CSV Structure Inspector

Find headers, row counts, and inconsistent columns.

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Data & developer

Base64 Encoder & Decoder

Encode Unicode text to Base64 or decode it back.

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Data & developer

URL Encoder & Decoder

Convert query values into safe URL components.

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Data & developer

Unix Timestamp Converter

Convert between epoch seconds, milliseconds, and human-readable dates.

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JWT Decoder

Read JWT header and payload as local JSON without verifying the signature.

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HEX / RGB / HSL Color Converter

Synchronize HEX, RGB, and HSL values instantly with a color picker.

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QR Code Generator

Generate a QR code for text or a URL and download PNG or SVG.

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Cron Expression Explainer

Validate classic five-field cron expressions and explain them in plain language.

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Data & developer

Tool Pipeline: CSV → Masking → JSON

Inspect CSV, mask sensitive-data candidates, and download JSON or CSV in one page.

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Data & developer

JSON Diff / Structural Compare

Find added, removed, changed, and type-changed paths in two JSON values.

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Data & developer

cURL to Code Converter

Generate JavaScript, Python, PHP, and Node.js code drafts from a cURL command.

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Data & developer

Meta Tag / Favicon Generator

Generate SEO, Open Graph, Twitter Card, and favicon tags in one safe HTML block.

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Data & developer

JSON Schema Generator

Infer a Draft 2020-12 starter schema from sample JSON.

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YAML ↔ JSON Converter

Convert YAML and JSON with safe parsing and clear error messages.

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XML Formatter & Validator

Validate, format, or minify XML syntax locally.

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JSON Flatten / Unflatten

Flatten nested JSON into lossless JSON Pointer paths and rebuild it.

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CSV Deduplicator & Duplicate Finder

Find and remove duplicate CSV rows by selected columns.

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URL Query Parameter Analyzer

Inspect URL components, duplicate parameters, and tracking tags.

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HTML Entity Encoder / Decoder

Encode HTML special characters as entities or decode them to text.

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Robots.txt Builder & Auditor

Parse robots.txt rules and find conflicts or critical crawl blocks.

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Hreflang Tag Generator & Auditor

Generate reciprocal hreflang tags and sitemap entries from locale URL mappings.

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FAQPage JSON-LD Generator

Build valid FAQPage JSON-LD from visible questions and answers.

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UTM Campaign URL Builder

Build consistent tracking URLs with source, medium, campaign, and content tags.

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JSON Lines Converter

Convert safely between JSON arrays and one-record-per-line NDJSON.

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JSON Pointer Explorer

Resolve nested JSON values with RFC 6901 pointers and inspect each path step.

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SQL Formatter & Query Analyzer

Format SQL queries and locally pre-screen risky query patterns.

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OpenAPI Endpoint Inventory

Extract method, path, tag, and security summaries from OpenAPI JSON.

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CSS clamp() Generator

Generate a bounded clamp() expression for fluid type and spacing.

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SemVer Comparator

Compare and sort versions with SemVer prerelease precedence rules.

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JSON Canonicalizer

Recursively sort object keys to produce stable JSON output.

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JSON String Escape / Unescape

Convert UTF-8 text to a JSON string literal or decode it safely.

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CSV to SQL INSERT Builder

Convert CSV rows into bounded, reviewable SQL INSERT drafts.

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HTTP Request Header Builder

Build a clean header draft from Accept, language, content type, and conditional options.

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UUID Inspector

Explain UUID format, version, variant, and special values.

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ULID Generator & Inspector

Generate a ULID with Web Crypto or inspect its timestamp locally.

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Changelog Formatter

Group rough release notes into Keep a Changelog-style sections.

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JSON Schema Example Generator

Derive a valid starter example and field checklist from a JSON Schema.

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CSV Column Profiler

Summarize column types, missing values, uniqueness, ranges, and sample distributions locally.

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CSV Join Simulator

Preview inner, left, or full joins between two small tables using a chosen key.

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JSON Patch Generator

Turn differences between two JSON documents into an RFC 6902 add, remove, and replace draft.

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JSON Merge Patch Lab

Create an RFC 7396 merge patch and preview its application on a safe example.

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API Pagination Planner

Build request limits, retry behavior, and termination checks for offset, cursor, or page pagination.

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HTTP Status Explorer

Review status meaning, cache implications, and recommended client action as a quick reference.

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MIME Type Inspector

Compare file extension, declared Content-Type, and sample magic-byte signals.

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Bulk UUID Validator

Check a UUID list for version, format, and duplicates.

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CSV Column Selector

Extract selected columns from a CSV table in your preferred order.

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JSON Sample Data Builder

Generate safe synthetic JSON records from field definitions.

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JSON Path Lister

List every leaf path and value type in nested JSON.

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JSON Key Mapper

Rename nested JSON keys with explicit mappings and stop on collisions.

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JSON Array Sort & Filter

Stably organize object arrays by field, direction, and equality filter.

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CSV Pivot Summary

Group CSV rows by a category and calculate count, sum, or average summaries.

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CSV Long ↔ Wide Reshaper

Reshape tables between long and wide form using explicit id, key, and value columns.

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GraphQL Variable Validator

Compare query variable definitions with JSON values to find missing, extra, and basic type errors.

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HTTP Cache-Control Builder

Build a consistent header from cache audience, lifetime, and revalidation decisions.

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Content-Disposition Builder

Generate inline or attachment headers with a safe ASCII fallback for Unicode filenames.

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ISO 8601 Date Inspector

Inspect date-time rows for UTC, epoch, offset, and ambiguous time-zone assumptions.

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JSON Path Value Extractor

Safely extract values with simple dot and array-index paths.

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Deterministic JSON Schema Fixture Builder

Build a repeatable test fixture from JSON Schema type, required, const, enum, default, and example keywords.

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CSV Column Renamer

Rename headers with a mapping table and stop collisions.

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CSV Delimiter Detector

Score comma, semicolon, tab, and pipe by row consistency.

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NDJSON Batch Validator

Validate every line as an independent JSON record and locate errors.

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SQL Parameter Inventory

Extract named, numbered, and question-mark parameters without executing SQL.

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URL Path Segment Analyzer

Decode path segments and expose empty, dot, and double-encoding risks.

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Accept-Language Parser

Sort language ranges by q-value and specificity.

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ETag Comparator

Show strong and weak ETag comparison results separately.

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JSON Object Merge Planner

Preview shallow and deep merge and report type conflicts.

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JSON Array Pagination Planner

Calculate page bounds, total pages, and empty-page state for an array.

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GraphQL Operation Inventory

Statically list query, mutation, and fragment names.

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HTTP Link Header Parser

Parse targets, rels, and parameters while preserving quoted commas.

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JSON Schema Backward Compatibility Checker

Find structural changes between two JSON Schema versions that may break consumers.

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OpenAPI Breaking Change Checker

Report removed paths, methods, parameters, and responses across two OpenAPI JSON documents.

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CSV Missing-Data Pattern Analyzer

Inspect column and row missingness patterns instead of only counting empty values.

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Data Field Dictionary Builder

Combine field name, type, purpose, sensitivity, source, and retention into an auditable dictionary.

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Retry-After & Backoff Planner

Turn 429/503 retry rules, exponential backoff, jitter, and caps into a visible timeline.

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Data & developer

Webhook Delivery Log Analyzer

Group webhook attempts by id, time, status, and latency to find failures, duplicates, and out-of-order delivery.

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Converters

Convert, compress, and organize image and PDF files without sending them off-device.

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Converters

PNG / JPG / WebP / SVG Converter

Convert PNG, JPG, WebP, or SVG images to PNG, JPG, or WebP in your browser.

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Converters

Image Compressor

Adjust image quality and longest edge to produce a smaller WebP or JPG copy.

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Converters

Images to PDF Converter

Combine PNG, JPG, WebP, and SVG images into one ordered downloadable PDF.

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Converters

PDF Merge

Merge multiple PDFs in your chosen order into one local PDF output.

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Converters

PDF Split / Page Extractor

Extract selected pages such as “1-3,5” from a PDF into a new PDF file.

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Converters

Image Resizer

Resize and re-encode PNG, JPG, or WebP while preserving aspect ratio.

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Converters

Data URI Encoder / Decoder

Convert text or a small file to a Data URI and decode Data URI metadata and content.

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Converters

Color Contrast Checker

Compare two colors against WCAG contrast ratios and text thresholds.

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Converters

CSS Gradient Generator

Generate linear-gradient CSS from validated color stops.

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Converters

CSS Box Shadow Generator

Create consistent box-shadow CSS and token output from dimensions and color.

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Converters

Number Base Converter

Convert integers between bases 2–36 using BigInt.

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Converters

Byte & Hex Inspector

Turn UTF-8 text into a byte/hex table or decode hex back to text.

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Converters

CSV to Markdown Converter

Convert CSV rows into an escaped Markdown table with selectable alignment.

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Converters

TSV ↔ CSV Converter

Convert tab- and comma-delimited tables while preserving quoting rules.

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Converters

Query String ↔ JSON

Convert between query strings and JSON without losing repeated parameters.

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Converters

Text to ASCII Table

Convert simple CSV, TSV, or JSON arrays into terminal-friendly fixed-width tables.

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Converters

Color Palette Converter

Convert HEX color lists into CSS variables, JSON tokens, and a Tailwind-style draft.

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Converters

INI ↔ JSON Converter

Convert between INI sections and flat JSON objects with visible assumptions.

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Converters

Properties ↔ JSON Converter

Convert Java `.properties` key-value rows and JSON into safe drafts.

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Converters

CSV ↔ Fixed-width Converter

Convert CSV tables to readable fixed-width text or parse them back with explicit widths.

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Converters

TOML ↔ JSON Converter

Convert basic TOML tables to JSON and flat JSON to a TOML draft.

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Converters

Base32 Encoder / Decoder

Encode UTF-8 with RFC 4648 Base32 or decode with validation.

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Converters

HEX ↔ Text Converter

Convert UTF-8 text to hexadecimal bytes and valid bytes back to text.

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Converters

Roman Numeral Converter

Convert integers 1–3999 to and from canonical Roman numerals.

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Converters

Large-Integer Base Converter

Convert integers beyond JavaScript's safe-number range losslessly between bases 2 and 36.

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Converters

iCalendar Event Builder

Build an escaped VEVENT draft from title, UTC time, and location.

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Converters

vCard Contact Builder

Build a vCard 4.0 draft from name, email, phone, and organisation.

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Converters

Multi-value Query ↔ JSON Converter

Convert query strings and JSON while preserving repeated parameter order as arrays.

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Converters

CSV → Safe HTML Table

Convert CSV cells to accessible table markup with HTML escaping.

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Privacy & security

Mask sensitive data and generate secure identifiers.

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Privacy & security

KVKK / GDPR Data Masker

Mask email, phone, IBAN, card, and IP patterns on-device.

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Privacy & security

Strong Password Generator

Generate a random 12–128 character password with Web Crypto.

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Privacy & security

UUID v4 Generator

Generate standard random UUID identifiers in your browser.

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Privacy & security

SHA-256 Digest Generator

Calculate a SHA-256 integrity digest with Web Crypto.

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Privacy & security

EXIF / Metadata Cleaner

Inspect sensitive JPEG and PNG metadata locally and download a clean copy.

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Privacy & security

Password Strength Tester

Assess a password using length, variety, estimated entropy, and crack time.

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Privacy & security

File Hash Calculator & Comparator

Calculate SHA-256 for one or two files and compare integrity locally.

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Privacy & security

Memorable Passphrase Generator

Generate long passphrases from readable synthetic words with Web Crypto.

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Privacy & security

HMAC Generator & Verifier

Generate HMAC-SHA-256/384/512 and locally compare an optional expected digest.

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Privacy & security

Subresource Integrity (SRI) Hash Generator

Generate sha256/384/512 SRI integrity values for a local file or text.

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Privacy & security

Email Header Analyzer

Inspect raw email headers for route, authentication, and inconsistency signals.

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Privacy & security

Password Policy Builder

Create an actionable policy draft from length, blocking, and recovery controls.

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Privacy & security

Secret Redaction Planner

Turn key, token, and connection-string candidates into a type-aware redaction plan.

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Privacy & security

Pseudonymization Mapper

Map identifier fields to consistent local pseudonyms and document reversibility and key-management risks.

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Privacy & security

Security Checklist Builder

Build an owned, evidence-ready security checklist from asset, threat, and change type.

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Privacy & security

JWT Expiry Timeline

Compare iat, nbf, and exp claims on a timeline with clock-skew and tolerance scenarios.

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Privacy & security

Password Breach Hygiene Check

Review reuse, length, patterns, and post-incident actions without sending the password anywhere.

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Privacy & security

Privacy Notice Gap Scanner

Flag potential gaps in purpose, data types, retention, rights, recipients, and contact sections.

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Privacy & security

Data Retention Schedule Builder

Combine data type, purpose, trigger, period, and deletion owner in one review table.

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Privacy & security

Anonymization Risk Pre-check

Find direct and quasi-identifiers, sparse groups, and small equivalence classes in a CSV sample.

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Privacy & security

Privacy Risk Register Builder

Score likelihood and impact and document owner, control, and residual risk.

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Privacy & security

Data Minimisation Decision Matrix

Classify fields as keep, remove, or review by purpose, necessity, retention, and alternatives.

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Privacy & security

Consent Record Template

Build an auditable draft for purpose, version, time, withdrawal, and evidence.

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Privacy & security

DPIA Screening Wizard

Turn scale, sensitivity, monitoring, and novelty signals into a reasoned review list.

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Privacy & security

Retention Expiry Calculator

Create UTC-safe deletion review dates from start dates and periods.

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Privacy & security

Redaction Consistency Checker

Find email, phone, identifier, and custom tokens left in before/after text.

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Privacy & security

Data Classification Labeler

Explain text patterns with public, internal, confidential, and restricted suggestions.

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Privacy & security

Breach Notification Timeline

Show elapsed time and decision points awaiting documented review.

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Privacy & security

Cookie Inventory Risk Classifier

Prioritise review from cookie name, domain, duration, and purpose.

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Privacy & security

3-2-1 Backup Readiness Checker

Combine copies, media, locations, encryption, and restore testing in an evidence-focused readiness report.

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Calculation tools

Calculate finance, education, and everyday measurements with transparent formulas.

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Calculation tools

Investment Return Simulator

Compare scenarios using an initial amount, recurring contribution, return, fees, and inflation.

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Calculation tools

Measurement / Unit Converter

Convert length, mass, temperature, volume, and data-size units instantly.

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Calculation tools

Weighted Grade Calculator

Calculate course or assessment grades with weights and validate the weight total.

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Calculation tools

GPA Converter

Estimate conversions among 4.0, 5.0, 10.0, and 100-point grade scales.

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Calculation tools

Loan Payment & Installment Calculator

Model an equal-payment loan using monthly interest, term, and fees.

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Calculation tools

IPv4 CIDR & Subnet Calculator

Calculate network, broadcast, host range, and usable addresses for IPv4/CIDR.

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Calculation tools

Percentage Change, Increase & Share Calculator

Calculate old-to-new change, part-to-whole share, and target increase in one report.

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Calculation tools

VAT / Tax & Discount Calculator

Calculate tax-inclusive/exclusive prices and sequential discounts transparently.

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Calculation tools

Duration, Worktime & Break Calculator

Calculate net duration with start/end times, overnight spans, and breaks.

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Calculation tools

Aspect Ratio Calculator

Reduce image/video ratios and scale a new width or height accurately.

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Calculation tools

Business Day Calculator

Count weekdays between dates with an optional holiday list.

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Calculation tools

Tip & Bill Splitter

Calculate tax, tip, and per-person totals with a transparent formula.

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Calculation tools

Compound Interest Calculator

Calculate a transparent growth scenario with principal and recurring contributions.

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Calculation tools

Savings Goal Planner

Estimate when a target can be reached from current balance and monthly savings.

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Calculation tools

Fuel Cost Calculator

Calculate fuel use and cost from distance, efficiency, price, and trip count.

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Calculation tools

Pace & Speed Converter

Derive kilometer/mile pace and average speed from distance and time.

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Calculation tools

Loan Amortization Estimator

Estimate monthly payments and an amortization schedule from principal, rate, term, and extra payments.

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Calculation tools

Inflation Purchasing Power

Compare future or past real value under an explicit constant-inflation assumption.

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Calculation tools

Break-even Calculator

Calculate break-even units and revenue from fixed cost, unit price, and variable cost.

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Calculation tools

Margin & Markup Calculator

Calculate cost, selling price, gross margin, and markup in both directions.

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Calculation tools

Probability Calculator

Calculate union, intersection, at-least-one, and conditional scenarios for independent events.

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Calculation tools

Sample Size Estimator

Estimate survey sample size from confidence, margin of error, proportion, and population.

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Calculation tools

Rent & Expense Splitter

Split rent and shared expenses fairly by person or weight.

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Calculation tools

Age Calculator

Calculate exact age in years, months, and days.

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Calculation tools

Salary & Hourly Pay Converter

Compare annual, monthly, and hourly gross pay with explicit assumptions.

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Calculation tools

Unit Price Comparator

Find the genuinely cheaper option across different pack sizes.

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Calculation tools

Descriptive Statistics Calculator

Calculate mean, median, quartiles, standard deviation, and outlier fences for a number series.

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Calculation tools

CAGR Calculator

Calculate compound annual growth from start, end, and years with a transparent formula.

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Calculation tools

ROAS & ROI Calculator

Separate ROAS, profit, and ROI from revenue, ad spend, and total cost.

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Calculation tools

Subscription Cost Planner

Combine monthly price, seats, and annual discounts to see the true yearly service cost.

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Calculation tools

Date Add/Subtract Calculator

Add years, months, days, or weekdays to a date with visible calendar-overflow handling.

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Calculation tools

Percentage Allocation Balancer

Scale allocations to 100% and expose rounding differences.

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Calculation tools

Package Unit-Cost Comparator

Normalise gram/kilogram and millilitre/litre packages to a common smallest unit and rank them.

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Calculation tools

Work-Pay Equivalence Calculator

Equate annual, monthly, weekly, and hourly pay using explicit paid-week and paid-hour assumptions.

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Calculation tools

Cash Runway Calculator

Calculate runway from cash, monthly income, spend, and safety buffer.

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Calculation tools

Stock Reorder Point Calculator

Calculate reorder point from demand, lead time, and safety stock.

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Calculation tools

Proportion Study Sample Planner

Plan a proportion study from confidence, margin, expected proportion, and finite-population correction.

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Calculation tools

Confidence Interval Calculator

Build an approximate z interval from mean, standard deviation, and sample size.

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Calculation tools

Meeting Cost Calculator

Expose total cost from participant rates, duration, and preparation time.

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Calculation tools

Shift Coverage Calculator

List gaps between hourly staffing demand and available capacity.

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Calculation tools

Debt Payoff Strategy Comparator

Compare snowball and avalanche methods with a transparent monthly simulation and the same budget.

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Calculation tools

Web Performance Budget Planner

Compare HTML, CSS, JS, image, and font kilobytes with a mobile transfer budget and produce a prioritised reduction plan.

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Everyday tools

Complete document and everyday productivity tasks on-device.

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Everyday tools

Citation Formatter (APA/MLA)

Turn book, article, and web-source details into an APA 7 or MLA 9 draft.

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Everyday tools

Invoice Template Generator

Create a printable local invoice draft with party, line-item, tax, and total details.

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Everyday tools

Simple Contract Template

Build a neutral contract draft from parties, scope, fee, term, termination, and signature fields.

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Everyday tools

Date Difference Calculator

Find calendar days, weeks, approximate years, and weekdays between two dates.

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Everyday tools

Cryptographic Random Picker & Team Shuffler

Shuffle a list with Web Crypto, pick entries, or split teams.

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Everyday tools

Time Zone Meeting Planner

Compare one meeting time across multiple IANA time zones.

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Everyday tools

Markdown Table Generator

Turn a JSON array or CSV data into an escaped, aligned Markdown table.

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Everyday tools

Decision Matrix

Compare options using weighted criteria and sensitivity notes.

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Everyday tools

SMART Goal Builder

Turn an intention into a specific, measurable, achievable, relevant, time-bound goal draft.

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Everyday tools

Agenda Builder

Build a time-boxed agenda and decision points from meeting goal, participants, and durations.

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Everyday tools

Shift Schedule Formatter

Turn person, start, and end rows into a table with overlap and rest warnings.

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Everyday tools

Checklist Composer

Turn loose tasks into a checklist with owner, priority, evidence, and completion criteria.

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Everyday tools

Recipe Scaler

Rescale ingredient amounts for a different serving count.

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Everyday tools

Time-Blocking Planner

Build an editable day plan from tasks, durations, priorities, and breaks.

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Everyday tools

Pomodoro Session Planner

Create a timed session schedule from focus, short-break, and long-break periods.

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Everyday tools

Event Checklist Builder

Build a phased event checklist from dates, owners, and tasks.

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Everyday tools

Release Notes Change Compiler

Organise raw change lines by user impact into added, improved, fixed, security, and breaking sections.

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AI tools

Prepare model inputs, context budgets, and conversation exports without a remote API.

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AI tools

Overconfidence Language Scanner

Flag absolute, guaranteeing, or unsupported certainty language and review calibrated alternatives.

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AI tools

Conversation Export Formatter

Normalize conversation transcripts as Markdown, JSONL, or plain text and review sensitive fields.

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AI tools

Token / Context Budget Planner

Allocate a context window across system instructions, history, sources, user input, output, and safety margin.

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AI tools

System Prompt Clarity Checker

Check purpose, authority, boundaries, conflicts, ambiguity, and output contract with transparent rules.

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AI tools

Role / Persona Consistency Checker

Compare a persona definition and sample responses for tone, role, boundaries, and prohibited behavior.

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AI tools

AI Response Evaluation Rubric

Build task-specific criteria, weights, and a four-level human evaluation rubric.

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AI tools

RAG Chunking & Context Budget Planner

Plan document tokens, chunks, overlap, result count, and prompt reserve together.

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AI tools

Prompt Injection Risk Pre-Scan

Find instruction override, secret requests, and tool-abuse signals with local rules.

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AI tools

AI Red-Team Checklist Builder

Create a risk-based, traceable test checklist for an AI use case.

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AI tools

Agent Task Decomposer

Break a complex goal into executable steps with dependencies, checkpoints, inputs, and expected outputs.

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AI tools

Context Priority Planner

Rank context chunks by necessity, recency, source quality, and token cost.

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AI tools

Hallucination Risk Checklist

Turn claim verification, sourcing, freshness, and uncertainty checks into a task-specific list.

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AI tools

RAG Source Quality Scorer

Score sources for primariness, freshness, coverage, citability, and contradiction risk.

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AI tools

Model Comparison Rubric

Build a rubric to compare models on accuracy, latency, cost, privacy, and error types using one test set.

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AI tools

Agent Input/Output Contract

Build a verifiable input, output, and error contract for an agent task.

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AI tools

Evaluation Dataset Template Builder

Turn input, expected result, and label rows into reviewable JSONL test records.

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AI tools

Agent Tool Authority Matrix

Define read, write, network, and human-approval boundaries in an explicit matrix.

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AI tools

Embedding Chunk & Overlap Planner

Calculate chunk count and repeated context from document length, chunk, and overlap.

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AI tools

Tool-Call JSON Validator

Validate tool name, argument object, and required-field contract locally.

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Code & file security

Run explainable local risk pre-scans for files, URLs, and source code.

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Code & file security

Local File Risk Pre-Scan

Inspect extension, signature, double extension, macro indicators, and bounded content samples without uploading.

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Code & file security

Code Security Pre-Scan

Find risky APIs, dangerous sinks, weak crypto, and embedded-secret patterns locally in source code.

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Code & file security

URL Security Pre-Check

Inspect credentials, IP hosts, Punycode, redirect parameters, and obfuscation signals without visiting the URL.

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Code & file security

CSP Builder & Auditor

Generate a secure Content-Security-Policy starter and audit risky sources.

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Code & file security

HTTP Security Headers Auditor

Audit pasted response headers for CSP, HSTS, nosniff, referrer, and permissions policies.

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Code & file security

.env Security Auditor

Inspect environment variables for format, duplicates, and secret risk without revealing values.

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Code & file security

Unix Permission Calculator

Convert chmod octal and rwx notation both ways and explain risky bits.

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Code & file security

CSP Nonce Generator

Generate nonces with Web Crypto for tests and configuration examples.

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Code & file security

Package Manifest Auditor

Produce explainable risk notes for package.json ranges, scripts, engines, and publishing fields.

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Code & file security

npm Script Risk Scanner

Find install lifecycle, network download, shell chaining, and deletion signals without execution.

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Code & file security

Regex Complexity Pre-check

Flag nested quantifiers, ambiguous repetition, and broad wildcards for ReDoS pre-review.

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Code & file security

Dockerfile Security Pre-check

Flag root user, floating tags, copied secrets, broad permissions, and cache residue by line.

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Code & file security

GitHub Actions Permissions Auditor

Pre-scan workflow permissions, unpinned action references, and risky pull_request_target usage.

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Code & file security

Checksum Comparator

Compare a text SHA-256 digest with an expected value in constant time.

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Code & file security

CSP Directive Merger

Merge two Content Security Policy strings while removing duplicates.

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Code & file security

Cookie Attribute Auditor

Audit Set-Cookie rows for Secure, HttpOnly, SameSite, domain, and prefix rules.

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Code & file security

CORS Policy Auditor

Find wildcard, credential, method, and Vary conflicts in CORS response headers.

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Code & file security

OAuth Redirect URI Auditor

Audit redirect URIs for HTTPS, wildcards, fragments, userinfo, and localhost boundaries.

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Code & file security

CSP Source Expression Tester

Review whether a URL matches a simple source-list and expose risky wildcards.

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Code & file security

SRI Value Verifier

Compare text SHA-256 with an integrity value on-device.

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Code & file security

Package Name Similarity Scanner

Compare candidate package names with a trusted list by edit distance.

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Code & file security

Punycode Domain Inspector

Find xn-- labels, mixed-script, and suspicious-separator signals.

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Code & file security

JWT Claim Policy Checker

Inspect exp, nbf, aud, iss, and required claims without verifying the signature.

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Code & file security

SSH Authorized Key Inspector

Show public-key type, comment, and SHA-256 fingerprint without private material.

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Code & file security

PEM Block Inspector

Inspect PEM boundaries, labels, and Base64 body integrity without opening keys.

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Code & file security

Git Diff Secret Scanner

Find high-signal secret patterns only in added diff lines.

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Code & file security

API Key Format Pre-check

Inspect prefix, length, alphabet, and entropy signals without storing the key.

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Code & file security

HTML Safe Attribute Checker

Statically find inline events, javascript URLs, and risky target combinations.

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Code & file security

HTTP Vary & Cache-Key Checker

Scan response headers for shared-cache risks around personalized content with explainable rules.

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Code & file security

ARIA Accessible-Name Inventory

Inventory buttons, links, and form controls with their accessible names and find unnamed controls.

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Research & evidence

Structure sources, claims, and evidence gaps with transparent methods.

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Research & evidence

Source Reliability Matrix

Compare sources by authorship, primariness, method, freshness, conflicts, and verifiability.

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Research & evidence

Research Question Decomposer

Break a broad question into concepts, subquestions, scope, evidence types, and exclusion criteria.

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Research & evidence

Evidence Synthesis Table

Combine source notes into claim, method, finding, limitation, contradiction, and confidence columns.

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Research & evidence

PICO Research Question Builder

Combine population, intervention, comparison, outcome, and time into a testable question.

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Research & evidence

Boolean Search Strategy Builder

Build documentable AND/OR search queries from concepts and synonym groups.

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Research & evidence

Claim–Evidence Gap Auditor

Compare claims with source, method, date, support direction, and limitations.

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Research & evidence

Source Freshness Tracker

Compare source date, expected refresh interval, and criticality to prioritize updates.

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Research & evidence

DOI Batch Validator

Normalise DOI strings and report syntax, duplicates, and safe links.

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Research & evidence

Literature Screening Decision Log

Find missing or conflicting record, decision, reason, and reviewer fields.

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Research & evidence

Evidence Table Deduplicator

Find likely duplicate record groups by DOI, title, and year.

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Research & evidence

Sitemap URL Set Analyzer

Find duplicates, mixed hosts, HTTP URLs, query parameters, deep paths, and likely locale-set inconsistencies in a URL list.

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Research & evidence

Robots Meta Policy Builder

Express indexing, link-following, snippet, image, and archive choices as a conflict-free robots meta tag.

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