Unique identifiers, generated locally
The UUID Generator creates RFC 4122-compliant UUID v4 identifiers — 128-bit values whose randomness makes collisions practically impossible — in any quantity, one click at a time or in bulk lists. Each identifier is generated by your browser's cryptographic random number generator, never fetched from a server.
Unique IDs are the plumbing of software: database primary keys, request tracing headers, file names, idempotency keys, test fixtures. Hand-rolling “unique” identifiers invites collisions; a proper v4 UUID gives you 122 bits of entropy, meaning you could generate billions per second for a century without repeating one.
Generation is instant and offline-capable — generate a list of a thousand UUIDs for test data, or a single one for a config value. Uppercase/lowercase and brace-wrapped formatting options match whatever your platform expects, and nothing you generate is ever logged.
Like every Piclizer tool, this one runs entirely in your browser — your files stay on your device.