UUID Validator
Check UUID formatting and identify the version and variant.
Runs entirely in your browser - your files are never uploaded
What is UUID Validator?
UUID Validator is a free, web-based utility designed for instant, local developer tools tasks. It allows users to compute, format, convert, or edit data directly in their browser without installing software or registering an account.
- 100% Free & Unlimited Usage
- 0% File Uploads (100% Client-Side Privacy)
- Instant Real-Time Calculations
- Mobile, Tablet & Desktop Compatible
How to use UUID Validator
Select or Enter Input
Provide your source file or type your values into UUID Validator.
Configure Settings
Adjust parameters, formatting options, or units in real-time.
Get Instant Output
Download the final processed file or copy the generated output.
About the UUID Validator
Paste one UUID or a whole list to check each against the RFC 4122 format. Valid identifiers report their version - v1 time-based, v3 and v5 name-based, v4 random, v6 and v7 time-ordered - plus the variant bits and the canonical lowercase form.
Braces, urn:uuid prefixes and uppercase input are all accepted and normalised, and invalid entries explain exactly what is wrong, whether that is the length, a stray character or a bad group boundary.
Frequently asked questions
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