UUID Generator

Generate random UUID v4 identifiers. Multiple formats supported.

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About UUIDs

UUID (Universally Unique Identifier) v4 generates 128-bit random identifiers with a collision probability so low it is practically impossible. UUIDs are used as primary keys in distributed databases, session tokens, API keys, file identifiers, and message queue correlation IDs.

This generator uses crypto.getRandomValues() for cryptographically secure randomness. Generate UUIDs in multiple formats: standard lowercase, uppercase, without dashes, and with braces. Bulk generate multiple UUIDs and copy them all with one click.