UUID Generator

Produce RFC 4122 v4 UUIDs to use as primary keys in PostgreSQL, MySQL, MongoDB, or DynamoDB. UUID primary keys eliminate auto-increment collisions when merging data across multiple database shards.

Generate batches of random UUIDs to populate test fixtures, seed scripts, and factory functions with realistic-looking identifiers. Supports generating up to 100 UUIDs in one click.

Copy a fresh UUID to use as an idempotency key in Stripe, Twilio, or other payment and messaging APIs. Guarantees that duplicate network retries do not result in duplicate charges or messages.

Get uppercase, no-dash formatted GUIDs that match the GUID syntax expected by C#, COM interfaces, and Visual Studio project files. Toggle uppercase and remove-dashes options with a single checkbox.

Use a v4 UUID as a session identifier, CSRF token, or one-time link token when a cryptographically random, collision-resistant string is needed. Suitable for use in cookies, query params, and headers.

Assign stable, globally unique identifiers to events, messages, and resources across microservices and distributed queues. UUIDs avoid ID collisions without requiring a central ID-generation service.