UUID Validator
Validate a UUID string, inspect its version and variant, and compare the normalized lowercase form.
Expected format: 8-4-4-4-12 hexadecimal characters with hyphens.
| Metric | Value |
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Privacy: validation runs locally in your browser. No UUID data is stored or transmitted.
How it works
Paste a UUID string and validate it against the standard 8-4-4-4-12 format. The tool also reports UUID version and variant details.
Examples
- 550e8400-e29b-41d4-a716-446655440000 → valid UUID v4-style format
- Letters may be uppercase or lowercase in the input
- The normalized output is shown in lowercase
When to use this tool
This tool is designed for quick, practical tasks such as everyday calculations, data formatting, or simple conversions. It is best used when you need fast results without installing software or using complex tools.
When to use
- Quick checks or one-time calculations
- Validating or converting data before using it elsewhere
- Simple tasks that do not require advanced software
When not to use
- Critical financial, legal, or medical decisions
- Large-scale or automated processing
- Situations requiring guaranteed precision beyond basic validation
Always review results before using them in important contexts.
About this tool
This tool helps you generate unique identifiers for systems and databases. It runs entirely in your browser without sending data to a server.
You can use this tool when creating IDs for records, sessions, or API requests. The results should be interpreted as a randomly generated UUID with extremely low collision probability.
FAQ
- What does this UUID validator do?
It checks whether a string is a valid UUID and identifies the version and variant when possible.
- Which UUID versions are recognized?
The validator recognizes common UUID versions such as v1 through v5 when the input follows the standard format.
- Does it normalize uppercase and lowercase letters?
Yes. It can display the normalized lowercase UUID form for comparison.
- Is my UUID input stored?
No. Validation runs locally in your browser and is not stored or transmitted.