UUID Generator

When to use UUID Generator

You're writing a database seed script and need 50 stable primary keys that won't collide with anything already in production — or you're demoing an app and need realistic-looking record IDs for a fake dataset a client will actually click through. Set the count, click generate, and `crypto.randomUUID()` produces the whole batch in your tab: version 4, cryptographically random, with a collision probability so low it's not worth modeling. Copy all of them in one shot and drop them into your migration file, test fixture, or Postman collection. No server is involved — the IDs are generated on your machine and nothing is transmitted between calls. No sign-in, no rate limit, no waiting for a response.

• Seed 50 primary keys into a local database migration script
• Populate a Postman collection with realistic record identifiers
• Generate placeholder IDs for a demo dataset before launch

About this tool

Generate one UUID or a hundred — version 4, cryptographically random, ready to copy. Useful when you're seeding a test database, populating a migration script with stable IDs, creating placeholder record identifiers for a demo, or anywhere you need a unique identifier that won't collide. Each UUID is generated in your browser using the Web Crypto API's `crypto.randomUUID()`, so they're genuinely random and nothing is sent to a server. Generate in bulk, copy all at once, or grab them one by one. No sign-in, no rate limit — just IDs.