UUID Generator

Generate universally unique identifiers (UUID v4) for your development needs. Create single or bulk UUIDs, format them as needed, and copy with a click. Secure, client-side, and no registration required.

What is a UUID and Why Use One?

Universally Unique

A 128-bit label used to uniquely identify information in computer systems without significant central coordination.

Randomness (v4)

This tool generates Version 4 UUIDs based on strong random numbers, making collisions astronomically unlikely.

Common Use Cases

Database Keys: Generate IDs on different servers or in offline apps without merge conflicts.
Transaction IDs: Assign unique IDs to transactions for easy tracking and debugging.
Session Tokens: Create unique, hard-to-guess tokens for user authentication.
Asset Naming: Avoid file naming collisions in storage systems.

100% Client-Side & Private

This tool runs entirely in your browser. We do not upload, store, or analyze any data.

UUID Generator workflow ideas

UUID Generator is most useful when it sits inside a small repeatable workflow: prepare the source, make the change, then check the output before sharing it.

Start with the source

Use UUID Generator for this job: Generate universally unique identifiers (UUID v4) for your development needs. Create single or bulk UUIDs, format them as needed, and copy with a click. Secure, client-side, and no registration required. It keeps the task in the browser without moving the work into a heavier desktop app.

Check the output

Preview the result, compare it with the original, and repeat the settings until the file is ready for a real project.

Keep the next step close

For adjacent tasks, stay inside the codes & data tools collection instead of opening another service.

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FAQ

What is UUID version 4 (v4)?

UUID v4 is a version generated using random numbers. Due to the massive number of possible combinations (2^122), the probability of collision is infinitesimally small.

Are these UUIDs truly unique?

Practically, yes. The number of possible v4 UUIDs is so large that you would need to generate billions per second for centuries to have a significant chance of a collision.

Is this UUID generator secure?

Yes. This tool uses the built-in, cryptographically secure `crypto.randomUUID()` function available in modern web browsers.