DeveloperRuns locally · No upload

UUID Validator

Check if a string is a valid RFC 4122 UUID and identify its version (v1–v8) and variant. Useful for API debugging and data validation.

Private by design

Everything runs in your browser. Your input is never uploaded, stored, or logged on our servers.

Works offline after load

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UUID Generator Online Free — Generate UUID v4 Instantly

Generate cryptographically random UUID v4 identifiers online. Free, private, bulk copy — runs in your browser, no upload.

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UUID Versions Explained (v1–v7)

Understand the different UUID versions and when each is used.

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Frequently asked questions

Is this tool free?+

Yes. Every Utiliio utility is free with no sign-up, usage limits, or paywalls.

Do you store my data?+

No. Processing happens entirely in your browser. Your input never leaves your device.

Can I use this tool offline?+

Yes. Once the page loads, most tools continue working without an internet connection.