UUID Generator
Generate UUID v4 identifiers. Bulk generate up to 1000 at a time.
About UUID Generator
Generate cryptographically strong UUID v4 identifiers using the browser's native crypto.randomUUID() API. Generate a single UUID or bulk-generate up to 1000 at once. Each UUID is guaranteed to be unique with an astronomically low collision probability. Copy individually or copy all at once. Useful for database primary keys, API tokens, test fixtures, and distributed system IDs.
All processing happens entirely in your browser using modern web APIs. Nothing is uploaded to our servers — your data stays local and private. Free to use forever.
Common use cases
- Generating primary keys for database records without a sequence
- Creating unique IDs for distributed systems where auto-increment is not viable
- Producing test fixture data with realistic-looking unique identifiers
- Generating correlation IDs for logging and tracing across microservices
- Creating idempotency keys for payment and API requests
How it works
Uses window.crypto.randomUUID() — a browser-native API that generates a version 4 UUID from 122 cryptographically random bits. The format is xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx where y is 8, 9, a, or b (the version 4 variant bits). Cryptographically random means the values come from your OS's secure random number generator, not Math.random().