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UUID Generator
Generate cryptographically random UUID v4 identifiers.
0 UUIDs · v4
Runs entirely in your browser. Nothing you paste is uploaded, logged, or stored.
What it does
Generates RFC 4122 version 4 UUIDs using the Web Crypto API (crypto.randomUUID / getRandomValues), so the identifiers are backed by a cryptographically secure random source rather than Math.random.
About UUID v4
A v4 UUID has 122 random bits, which makes accidental collisions astronomically unlikely. That makes it a solid default for database primary keys, idempotency keys, correlation IDs, and file names that must not clash.
FAQ
- Are these UUIDs safe to use as primary keys?
- Yes. Version 4 UUIDs have 122 bits of randomness from a secure source, so collisions are effectively impossible in practice.
- Are the UUIDs generated on a server?
- No. They are generated locally using your browser's Web Crypto API. Nothing leaves your device.