UUID Generator
Generate random v4 UUIDs (GUIDs) locally in your browser using the platform CSPRNG. Free and private, no data sent anywhere.
Generate RFC 4122 version 4 UUIDs. Random, 122-bit unique identifiers commonly used for database keys, API request IDs, session tokens, and file names. Grab one instantly or generate a batch when you're seeding test data or writing migration scripts.
How to use it
- Set how many UUIDs you need (one or a batch)
- Click generate to create random v4 UUIDs instantly
- Copy a single UUID or the whole list to your clipboard
Frequently asked questions
- Are these UUIDs actually unique?
- Practically, yes. A v4 UUID has 122 random bits, so the odds of two colliding are astronomically low. You'd need billions of UUIDs generated per second for trillions of years before a collision became likely.
- Can I use these in production databases or APIs?
- Yes, v4 UUIDs are the standard choice for primary keys, request IDs, session tokens, and any place you need a unique identifier without a central counter. Just don't use them where you need IDs that sort chronologically, for that you'd want something like UUIDv7.
- Does this tool send my UUIDs anywhere?
- No. Generation happens entirely in your browser using the Web Crypto API, so nothing is logged or transmitted, useful if you're generating IDs for sensitive systems.
- What format do the UUIDs come in?
- Standard lowercase hyphenated format, e.g. 3fa85f64-5717-4562-b3fc-2c963f66afa6. You can generate one or a batch and copy them all at once.
- 1
Nothing is uploaded
The file never leaves your device. There is no server to send it to, so there is nothing to leak, log, or subpoena.
- 2
No signup, no limits
No account, no email, no daily cap, no watermark, and no paid tier waiting behind the third file.
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Works offline
Load the page once and it keeps working with the network off, because all the work was always happening locally.