Free UUID generator (v4, browser-only)
Generate standards-style v4 UUIDs using crypto.getRandomValues in your browser. No server round-trip.
How to use this tool
- 1
Open UUID generator
Use it for this task: Bulk UUID v4 generation, crypto-random values, clipboard copy, .txt download - 100% local.
- 2
Generate values
Choose the version, quantity, or format options, then let the tool create values instantly.
- 3
Copy the values you need
Copy one value or the full list into your app, database seed, test data, or notes.
Quick facts
| Runs offline? | Yes — after load, processing stays in your browser. |
|---|---|
| Uploads data? | No. Your input is not sent to our servers. |
| Account required? | No signup or login. |
| Locales? | UI in 7 languages; tool logic is locale-agnostic. |
Top use cases
- Bulk UUID v4 generation, crypto-random values, clipboard copy, .txt download - 100% local.
- Runs offline?: Yes — after load, processing stays in your browser.
- Uploads data?: No. Your input is not sent to our servers.
- Account required?: No signup or login.
- Locales?: UI in 7 languages; tool logic is locale-agnostic.
FAQ
Does my data leave this device?▾
No. This tool runs in your browser tab; we do not receive your input.
How is this different from desktop software?▾
No install — open and use. Best for quick, small jobs.
How large can inputs be?▾
Limited by device memory. Very large inputs may be slow — split batches if needed.
Mobile browsers?▾
Modern mobile browsers work; heavy jobs are smoother on desktop.
How accurate are results?▾
We use standard Web APIs; verify critical outputs yourself.
How to report issues?▾
Use the Contact link in the site footer.