UUID Validator
The UUID Validator verifies that a string conforms to the standard UUID format defined by RFC 4122. Paste one or multiple UUIDs (one per line) and the tool reports whether each is valid together with its version number. Handles optional curly braces and rejects malformed inputs such as wrong length or invalid hex characters. Useful for debugging logs, validating database records, verifying tokens, and sanity-checking IDs generated by third-party libraries.
How to Use
To use the UUID Validator, simply open the tool page and interact with the controls in the panel above. The interactive panel handles input and produces instant results entirely in your browser — no signup, no upload. Use the Copy button when you want to transfer the output to your clipboard.
Key Features
- Runs in your browser — No data uploads or server roundtrips.
- Free & no signup — Use without registration or limits.
- Privacy first — Your input never leaves your device.
- Instant results — All processing is synchronous and local.
- Copy & download — Copy output or download to a file when supported.
Common Use Cases
This tool is useful for developers, designers, testers, students, and anyone who needs a quick, browser-based utility without installing software.
Tips & Tricks
Bookmark the tool for quick access during your workflow. Combine it with the related tools listed below for end-to-end productivity.
Frequently Asked Questions
What UUID formats are supported?
All RFC 4122 variants: v1, v2, v3, v4 and v5, with or without surrounding curly braces.
Can I check multiple UUIDs at once?
Yes. Paste them one per line. Each line is independently validated and reported with line number.
What about uppercase UUIDs?
Yes. UUIDs are case-insensitive and accepted in upper, lower, or mixed case.
What is the variant field?
The most significant bits of byte 8 must be 10x for RFC 4122. We accept variants flagged by 8, 9, A, B, A2 that conform.
Is the validator free?
Yes. No signup, no usage limits. Use as often as you need.