Input is structured with disclosed rules and is not sent to an external system without user action.
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Data & developer
ULID Generator & Inspector
Generates a 26-character ULID from the current millisecond and cryptographic random bytes when blank, or decodes Crockford Base32 format and its 48-bit time. It does not guarantee monotonic generation or global uniqueness.
✓ Free✓ No account✓ In-browser
QUICK ANSWER
What does this tool do?
Generate a ULID with Web Crypto or inspect its timestamp locally.
APPLICATION AND DECISION GUIDE
ULID Generator & Inspector: method and usage
Generates a 26-character ULID from the current millisecond and cryptographic random bytes when blank, or decodes Crockford Base32 format and its 48-bit time. It does not guarantee monotonic generation or global uniqueness.
fields or lines that follow the tool labels and contain no unnecessary personal data Confirm the shape first with a small example containing no personal data.
an editable draft, field summary, and explicit next action
Practical steps
- Leave blank to generate or enter a ULID.
- Run local generation or inspection.
- Define collision and ordering policy separately for distributed systems.
manual review of required fields, dates and numbers, audience fit, and any official requirements
Verify schema, encoding, and data-loss assumptions in the target system.
Suitable use cases
- Sortable sample identifiers
- Inspecting ULID time
- Test data
LEARN THE WORKFLOW
Guides for this tool
An In-Browser Data Delivery Pipeline for JSON, CSV, HTTP, and Identifiers
Reduce delivery mistakes with stable JSON, reviewable SQL, correct HTTP headers, and explainable identifiers.
Read guide →Reliable Scheduling with Cron and Unix Time
Prevent time zones, DST, field order, and second-vs-millisecond mistakes from breaking scheduled jobs.
Read guide →ABOUT THIS TOOL
Frequently asked questions
What input does ULID Generator & Inspector accept?+
fields or lines that follow the tool labels and contain no unnecessary personal data Leave blank to generate or enter a ULID.
What does ULID Generator & Inspector return?+
an editable draft, field summary, and explicit next action Input is structured with disclosed rules and is not sent to an external system without user action.
How should I validate ULID Generator & Inspector output?+
manual review of required fields, dates and numbers, audience fit, and any official requirements
Does ULID Generator & Inspector send or store input on a server?+
Tool input is processed in the active tab. Saving to the Workstation or transferring to another tool is a separate choice. Consider browser extensions and shared devices separately; the privacy page explains advertising and network connections.