Developer Utilities
UUID Generator
UUIDs (universally unique identifiers) are used everywhere in software development — as database primary keys, API request IDs, session tokens, and test data — precisely because they can be generated independently on different machines with virtually no chance of collision. This free UUID generator creates random version 4 UUIDs, the most common variant, using your browser's built-in cryptographically secure random number generator. Generate a single UUID or a batch at once, then copy them individually, copy the whole list, or download it as a text file. Nothing is sent to a server — each UUID is generated locally on your device.
Processed entirely in your browser — your files are never uploaded anywhere.
5 UUIDs
1e8cab07-b044-4ebe-a55c-75db7e46d77fa88d5335-d9b3-4edd-8f46-93de06a5983a96cd992f-b90f-4acb-b50d-84f62629b6f4fb4d0b1e-ab0c-4345-bf0c-4ead355811a23b65295d-dd35-4167-a7f9-54f56627f0f2
How to use this tool
- Choose how many UUIDs you want.
- Click Generate.
- Copy an individual UUID, copy them all, or download the list as a text file.
Frequently asked questions
- How random are these UUIDs?
- They're generated using the browser's built-in crypto.randomUUID() function, which uses a cryptographically secure random number generator — the same standard used by v4 UUIDs everywhere.
- Can two generated UUIDs ever collide?
- It's astronomically unlikely — v4 UUIDs have 122 random bits, so the chance of a collision is negligible even across trillions of IDs.
- What's the difference between UUID versions?
- Version 4 (used here) is randomly generated and by far the most common in modern software. Other versions (like v1 or v5) derive the ID from a timestamp, MAC address, or a hash of a name — this tool only generates v4.
- Can I generate UUIDs in bulk?
- Yes — choose a batch size from the dropdown, then copy or download the full list at once.
- Is this UUID generator free to use?
- Yes, completely free with no limits on how many times you can generate UUIDs.