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Free security tool

UUID Generator & Validator

Generate and validate UUIDs in seconds. Create a fresh v4 ID, check any UUID against RFC 4122, and copy the result — fast, private, and processed right in your browser.

Working field

Generate a UUID or paste one to validate.

100% private — all generation runs in your browser. Your data never leaves your device.

Validation result

Your UUID status and version appear here.

Generate a UUID or paste one and click Validate UUID to see the result here.

Best for unique database keys, asset IDs, and distributed systems.

Free UUID Generator & Validator — Fast, Secure, Private

Create a fresh UUID with one click and validate any UUID against RFC 4122. Built for developers working on distributed systems, database keys, and unique asset IDs. The tool sits up top so you can work first and read guidance below. Free, fast, and no sign-up. Need more? Pair it with the SHA-256 Hash Generator or the Strong Password Generator.

Instant generation

Create a fresh, high-entropy UUIDv4 the moment you click Generate.

Built-in validation

Check any UUID against the RFC 4122 format and see its version.

100% private

All processing happens on your device — no server uploads, ever.

No setup required

Use it right in the browser — no account, no install, no waiting.

How it works

  1. Click Generate UUID for a fresh v4 identifier.
  2. Or paste an existing UUID into the field above.
  3. Click Validate UUID to check its format and version.
  4. Copy the result or clear the field to start again.

Best practices

  • Use UUIDv4 for unpredictable, unique keys.
  • Validate UUIDs before saving them to a database.
  • Keep UUIDs for IDs, not for passwords.
  • Pair a UUID key with a SHA-256 hash for integrity.
  • Store UUIDs as their full 8-4-4-4-12 string.
  • Keep sensitive data local — no uploads needed.

Frequently asked questions

Is this UUID generator free?

Yes. It's 100% free — no login, no install, no subscription.

What UUID versions does it support?

It generates UUIDv4 (random) and validates UUIDs across the standard versions used in modern development.

Is UUID generation secure?

Yes. The tool uses cryptographically strong random values right in your browser, so tokens stay secure and private.

How is a UUID different from a regular ID?

Regular IDs are often sequential and easy to guess. A UUID is a 128-bit random string that's virtually impossible to duplicate.

Can I use a UUID as a password?

No. UUIDs are unique but not built for passwords. Use the Strong Password Generator for that.

Does this tool store the UUIDs I generate?

No. All generation and validation run locally. Refresh the page and the data is gone for good.

What makes a UUID valid?

It must follow the 8-4-4-4-12 hexadecimal format and match the version bits defined in RFC 4122.

Does it work on mobile?

Yes. The tool is fully responsive and works on phones, tablets, and desktops.

For related security work, try the SHA-256 Hash Generator or Strong Password Generator.