Local UUID / privacy-first
Generate and validate UUIDs locally.
Generate v4/v7 UUIDs, or check pasted values for format, version, variant, and duplicates. Nothing is uploaded or saved.
UUID operation
Up to 100 values. A UUID is an identifier, not a secret or signature.
Result
What is checked
- v4 is random; v7 includes millisecond time. Generation stays in this browser.
- Validation reports canonical format, version, variant, and duplicates. Invalid values never count as successful.
- No external request, upload, input storage, or uniqueness guarantee is provided.