Pembuat UUID v4 Online — Gratis Bulk UUID
Buat ID UUID v4 yang acak secara kriptografis di peramban. Berguna untuk primary key, idempotency token, dan ID sumber daya unik.
Klik Buat untuk menghasilkan UUID v4 baru via crypto.randomUUID(). Sebanyak yang Anda butuhkan — tidak ada yang dicatat.
- Ketik atau tempel sesuatu untuk mulai
Kasus penggunaan umum
- 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.
Pertanyaan yang sering diajukan
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).