UUID Generator
UUID Generator: free, instant and private. UUID v4 is random rather than sequential, so it does not reveal creation order or machine identity, and collision odds are negligible for any realistic dataset.
How the UUID Generator works
The UUID Generator takes How many, Version and returns the answer instantly — no button to hunt for, no page reload. UUID v4 is random rather than sequential, so it does not reveal creation order or machine identity, and collision odds are negligible for any realistic dataset. Ideal for database keys, test fixtures and request tracing.
Enter your own numbers to replace the example values; the result panel updates as you type. Everything runs in this single page, so nothing you enter leaves your device.
Formula used
128 random bits, with version and variant bits set (RFC 4122 v4)
| Symbol | Meaning |
|---|---|
| count | how many identifiers to generate |
| version | v4 — random, no MAC address or timestamp leaks |
UUID v4 is random rather than sequential, so it does not reveal creation order or machine identity, and collision odds are negligible for any realistic dataset. Ideal for database keys, test fixtures and request tracing.
Inputs used: How many, Version.
Worked example
Take the default example — how many of 5, version set to UUID v4:
- list: b7d68f44-1007-428e-8cdf-c4db7fb4e45e 11d0499f-cc4b-469a-805c-425144aea3d3 d0e4a257-6bb5-4662-8252-2fbd6afcac7b 08020cd2-27de-4b7c-8ab1-66d878ccfe3f b2da2b7c-795f-46a5-b2af-d4929f2fff40
- count: 5
Frequently asked questions
- What formula does the UUID Generator use?
- It uses 128 random bits, with version and variant bits set (RFC 4122 v4), where count is the how many identifiers to generate; version is the v4 — random, no MAC address or timestamp leaks.
- Is the UUID Generator free?
- Yes. There is no signup, no usage limit and no watermark — the generator runs entirely in your browser.
- How do I read the result?
- UUID v4 is random rather than sequential, so it does not reveal creation order or machine identity, and collision odds are negligible for any realistic dataset. Ideal for database keys, test fixtures and request tracing.
- Does the UUID Generator store or send my data?
- No. Every calculation happens locally in the page, so the numbers you type are never uploaded or logged.
- Does it work on a phone and offline?
- Yes — the page is a single lightweight file that adapts to any screen size. Once it has loaded it keeps working without a network connection.