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UUID Generator

Generate random v4 or name-based v5 UUIDs (GUIDs).

Hashing & CryptoBrowser-only • PrivateFree

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UUIDs (v4)

Output will appear here...

Privacy First: All processing happens locally in your browser. Your data never leaves your device and is never uploaded to any server.

About UUID Generator

The UUID Generator creates universally unique identifiers — random version 4 UUIDs or deterministic name-based version 5 UUIDs — for primary keys, record IDs, and distributed systems where collisions must be avoided. You can generate one or many at once. Generation runs locally in your browser using secure randomness, so nothing is uploaded. For shorter URL-friendly IDs use the Nano ID Generator, and for API secrets the API Key Generator.

How to Use

1Open UUID Generator and paste or type your data into the input area.
2Adjust any available options to match the result you want.
3Your output is generated instantly — no button-clicking required for most tools.
4Use the Copy or Download button to save your result.

Common Use Cases

Generating checksums to verify file and data integrity
Creating unique identifiers for records and keys
Hashing passwords and secrets during development
Comparing hashes to detect tampering or duplicates

Frequently Asked Questions

What's the difference between UUID v4 and v5?

Version 4 UUIDs are random, ideal when you just need a unique value. Version 5 UUIDs are derived from a namespace and name, so the same input always yields the same UUID — useful for deterministic IDs.

Are UUID collisions possible?

In practice, no. A version 4 UUID has 122 random bits, so the odds of generating the same one twice are astronomically small, which is why they're safe as globally unique keys.

Is UUID Generator free to use?

Yes. UUID Generator is completely free with no sign-up, no subscription, and no usage limits. Every tool on CodeUtilityKit is free forever.

Is my data safe when I use UUID Generator?

Absolutely. UUID Generator runs entirely in your browser. Your input is processed locally with JavaScript and is never sent to, stored on, or logged by any server — so it is safe even for private or sensitive data.