Gerador de UUID v4 online — grátis e em lote
Gere identificadores UUID v4 criptograficamente aleatórios no seu navegador. Útil para chaves primárias, tokens de idempotência e IDs únicos.
Clique em Gerar para produzir um novo UUID v4 via crypto.randomUUID(). Quantos quiser — nada é registrado.
- Digite ou cole algo para começar
Casos de uso comuns
- 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.
Perguntas frequentes
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).