UUID Generator
UUID v4, Nano IDs and short IDs in bulk.
About UUID Generator
UUID Generator produces UUID v4, Nano IDs and short IDs in bulk, using crypto.getRandomValues rather than Math.random — the distinction matters, because Math.random is predictable and unsuitable for anything security adjacent. Generate up to 500 at a time and export as a text file.
How to use it
- Choose the ID type and how many you need.
- Click Regenerate for a fresh batch.
- Copy them all, or save as .txt.
Questions
What is UUID v4?
A 128-bit identifier with 122 random bits. Collisions are so improbable you can generate them independently on different machines and safely assume they will never clash.
When should I use a Nano ID instead?
When the ID appears in a URL. At 21 characters it is shorter than a UUID’s 36 while keeping comparable collision resistance.
Are 8-character short IDs safe for database keys?
No. Collisions become realistically likely above a few hundred thousand rows. Use them for throwaway references only.
UUID Generator is free and runs entirely in your browser. No account, no upload, no watermark, no limit on use.