UUID Generator
Generate random UUIDs (v4) or time-based UUIDs (v1). Free, instant, 100% private — all in your browser.
About UUIDs
UUID (Universally Unique Identifier) is a 128-bit number used to uniquely identify information. Also called GUID (Globally Unique Identifier).
Versions
| Version | Method | Use Case |
|---|---|---|
| v1 | Time + MAC address | Sortable, traceable. Database primary keys. |
| v4 | Random | Most common. IDs, tokens, filenames. |
| Nil | All zeros | Special sentinel value (00000000-0000-0000-0000-000000000000). |
🔒 All UUIDs are generated in your browser. No network calls.
About UUID Generator
Generate random UUIDs (v4) and time-based UUIDs (v7). Create single IDs or bulk generate up to 100 at once. Copy in multiple formats. Uses crypto.getRandomValues() for secure randomness. All in your browser.
UUID v4 & v7
Random UUID v4 for general use. Time-sortable UUID v7 for databases — better index performance.
Bulk Generation
Generate up to 100 UUIDs at once. Copy all, download as text, or pick with one click.
Multiple Formats
Standard (with dashes), no-dash (compact), uppercase, and URN format. Copy in your preferred style.
Cryptographically Secure
Uses crypto.getRandomValues() — not Math.random(). Production-quality unique identifiers.