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: c649fd96-be1c-465b-9417-14f1b629792a 34d1b2ab-f043-4f86-bacc-8118c30f244d 15f2a3bc-8041-46d8-ab02-46352fb239fc 89ea7284-6f52-4893-a2ee-232fed26668d 1b996102-8bcd-44dd-bf70-3e7933ed7317
- 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.