Processing boundary
Input is processed only in the active browser tab's memory and is not sent to a ByteQuant server.
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Data & developer
Hreflang Tag Generator & Auditor
Validates BCP 47 language/region codes and absolute HTTPS URLs and reports missing self-reference, duplicate languages, or x-default. It generates HTML link tags and an XML sitemap xhtml:link draft.
✓ Free✓ No account✓ In-browser
Persistent storage
Input and output are not stored. The optional usage counter keeps only tool identity and count, never content.
Verification
Output comes from disclosed rules or browser APIs and needs independent review before high-impact use.
A result in three steps
- 01
Enter one `language|absolute URL` mapping per line.
- 02
Generate tags and fix code or URL warnings.
- 03
Verify the identical reciprocal cluster appears on every language page.
When is this tool useful?
- ✓ Publishing multilingual pages
- ✓ QA for hreflang clusters
- ✓ Preparing sitemap alternates
Important limitation
Automated output is a preliminary assessment. Do not use it alone for legal, financial, medical, or security-critical decisions.
LEARN THE WORKFLOW
Guides for this tool
Technical SEO Workflow: Slugs, Robots.txt, Hreflang, FAQ, and UTM
Combine crawl access, canonicals, language clusters, visible structured data, and campaign URLs in one auditable process.
Read guide →ABOUT THIS TOOL
Frequently asked questions
Does this tool send input to a server?+
No. Processing runs in this browser tab. Data leaves the page only when you choose to copy or download the result.
Is the result definitive?+
The tool produces consistent output from disclosed rules and browser APIs, but context, data quality, and method limitations can affect it. Verify high-impact decisions.
Is input saved?+
No. Tool input is not persisted. With consent, only tool identity and usage count may be kept on this device for personal shortcuts.