How it works
Pick a version
v4 (random) for tokens, v7 (time-ordered) for database keys, or Nil UUID.
Set count & format
1 to 1000 UUIDs. Choose case, with or without hyphens, or braced.
See instant output
Generated with cryptographically secure random — RFC 9562 compliant.
Copy or download
Copy all to clipboard, or download as CSV for spreadsheets / TXT for scripts.
Generating UUIDs in code
Every modern language has built-in UUID support — here's the correct, cryptographically secure way:
UUID v7 vs UUID v4 — which unique identifier to use
Most people default to UUID v4 because it's the most familiar version, but v7 is the modern choice for database primary keys. This UUID generator supports both plus the special Nil UUID:
🏆 UUID v4 (random)
- 122 bits of pure randomness
- Best for security tokens, API keys, session IDs
- Zero information leakage — safe to expose publicly
- Collision probability: 1 in 2.71×1018
- Format:
xxxxxxxx-xxxx-4xxx-[89ab]xxx-xxxxxxxxxxxx
🔑 UUID v7 (time-ordered)
- First 48 bits: Unix timestamp in milliseconds
- Best for database primary keys — 10-20% faster inserts than v4
- Sortable by creation time without a separate column
- Standardized in RFC 9562 (May 2024)
- Format:
xxxxxxxx-xxxx-7xxx-[89ab]xxx-xxxxxxxxxxxx
Cryptographically secure random — why the browser API matters
This UUID generator uses crypto.getRandomValues() and crypto.randomUUID() — the same cryptographic APIs that browsers use for HTTPS keys and password hashing. Many older UUID generators use Math.random(), which is predictable and unsuitable for security-sensitive uses like session tokens or API keys. If someone knows a few of your UUIDs, they can potentially predict the next ones. Cryptographic randomness makes this impossible.
Bulk UUID generation up to 1000 at once, CSV or TXT export
Need a batch for a database migration, test fixtures, or seeding a distributed system? Set the count up to 1000 and download as CSV (with a header row for direct spreadsheet import) or plain TXT (one per line, ready for a script). Every UUID is generated independently — batch generation doesn't reduce randomness.
Generate UUID online — v4, v7 and Nil unique identifier support
This uuid generator (v4) runs entirely in your browser using JavaScript. Provide your input, adjust any settings, and get instant results — nothing is uploaded to a server, making it both fast and completely private.
Whether you need this tool once or use it daily as part of your workflow, it remains completely free with no sign-up, no usage limits, and no interrupting advertisements. Every calculation, conversion and generation happens locally on your device — your data stays yours from start to finish.
Why browser-based tools are better
Server-based tools require uploading your data, waiting for processing, and trusting a third party with your information. This tool eliminates all three concerns: processing happens on your own device, results appear instantly regardless of your internet speed, and the tool continues working even offline once the page has loaded. For professionals handling sensitive data, this local-processing approach is a genuine practical advantage.
Random UUID and GUID use cases
This tool serves content creators, developers, students, designers and everyday users who need a quick, reliable utility without the overhead of installing desktop software or creating yet another online account. It does one job well and gets out of your way — exactly what a good tool should do.
Getting the best results
Start with the highest quality input available, use the specific settings the tool provides rather than accepting defaults, and bookmark the page for instant future access. For sharing with team members, simply share the page URL — no accounts or installations needed on their end.
| Feature | Details |
|---|---|
| Price | 100% free, no limits |
| Privacy | Runs in browser, no uploads |
| Devices | Phone, tablet, desktop |
| Offline | Works after page loads |
💡 Key takeaways
- Free uuid generator (v4) — instant results in your browser
- No sign-up, no upload, 100% private
- Works on every device — phone, tablet, desktop
- No usage limits — free forever
Pro tip: Bookmark this uuid generator (v4) for instant access — it loads in under a second and works offline once cached.
Why choose our tool?
100% Private
Everything runs in your browser. Your data never leaves your device — no uploads, no server processing, no tracking.
Instant Results
No loading screens, no waiting, no queues. Results appear the moment you click — powered by client-side JavaScript.
No Sign-Up Ever
No accounts, no emails, no passwords. Just open the page and start using it — forever free, no strings attached.
Works Everywhere
Phone, tablet, laptop, desktop — any browser, any OS. Fully responsive and works offline once loaded.
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