UUID v4 generator online — gratis bulk UUID
Genereer cryptografisch willekeurige UUID-v4-id's in je browser. Handig voor primaire sleutels, idempotency-tokens en unieke resource-ID's.
Klik Genereren om een nieuwe v4-UUID met crypto.randomUUID() te maken. Zo veel als je wilt — niets wordt gelogd.
- Typ of plak iets om te beginnen
Gangbare toepassingen
- 1Pre-generate IDs for database records before you have an INSERT round-trip.
- 2Create idempotency keys for retry-safe API calls.
- 3Stamp upload filenames so two simultaneous uploads cannot collide.
Veelgestelde vragen
Is this UUID v4 or v7?+
v4 — fully random with 122 bits of entropy. It does NOT sort by time. If you need time-ordered IDs use UUID v7 or ULID instead.
How unlikely is a collision?+
Generating 1 billion UUIDs per second for 100 years still leaves less than a one-in-a-billion collision chance. Practically zero for any sensible workload.
Are these UUIDs cryptographically random?+
Yes. crypto.randomUUID() uses the OS CSPRNG (/dev/urandom on Linux, BCryptGenRandom on Windows, SecRandomCopyBytes on macOS).