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THE FEUTEX TOOLKIT

UUID Tools

UUID tools to generate v4/v7 UUIDs, validate UUID strings, normalize formats (URN/braces/hyphenless), and inspect version/variant. Fast, offline, no tracking.

UUID generator + validator + formatter
Offline, no network calls. Accepts UUID, URN UUID, braces, hyphenless hex.
Input (one per line)
Tip: For bulk validate/normalize, paste multiple lines.
Generate
Count is capped to keep the page fast.
Output format
Output
Validate outputs use: OK or INVALID per line. Inspect outputs are JSON.
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Privacy: runs locally in your browser. No uploads, no tracking scripts.

How to use

Use this page as a generator, validator, and formatter for UUID strings.

  1. Generate: choose UUID version (v4 or v7), set a count, pick an output format, then click Generate.
  2. Validate: paste one UUID per line and click Validate to see which ones are valid.
  3. Normalize: paste UUIDs in any common form (URN, braces, hyphenless) and click Normalize to get canonical UUIDs.
  4. Inspect: paste a UUID and click Inspect to view version/variant (and v7 timestamp).

FAQ

What UUID versions can this tool generate?

It generates UUID v4 (random, RFC 4122) and UUID v7 (time-ordered draft format).

Does validation accept URN UUIDs or braces?

Yes. It accepts urn:uuid:..., {...}, and hyphenless 32-hex forms and normalizes before checking.

What does “RFC 4122 variant” mean?

The variant is encoded in the UUID and indicates which layout rules apply; most modern UUIDs should be RFC 4122 (variant 1, leading bits 10).

Is UUID v7 officially standardized?

UUID v7 is based on an IETF draft; it’s widely implemented but not the original RFC 4122 set.

Is generation secure?

v4 uses crypto.getRandomValues in your browser. If that API isn’t available, generation will fail with an error.

Can I generate UUIDs without hyphens or as URNs?

Yes. Use the output options to remove hyphens, change case, and/or add the urn:uuid: prefix.

Does this tool send my UUIDs anywhere?

No. All parsing and generation run locally in your browser; the script does not make network requests.

Continue your workflow

Browse related tools by task. Use the improved core tools for a consistent workspace with file import, downloads and clear validation errors.

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