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UUID Generator
Generate cryptographically random UUID v4 values
Runs locally in your browser
Generation
How it works
Generates cryptographically random UUID version 4 identifiers using the Web Crypto API—suitable for database primary keys, correlation IDs, and file names.
Who it's for: Backend and frontend developers, QA engineers, and anyone needing unique identifiers without a server
Creates RFC 4122 version 4 UUIDs with strong randomness from crypto.getRandomValues.
Supports generating multiple UUIDs in one click (up to the tool’s limit).
No network calls; IDs are created instantly in the browser.
How to use
- Set how many UUIDs you need (typically 1–20).
- Click Generate to produce new v4 identifiers.
- Copy a single UUID or the full list for seeds, test data, or application use.
- Paste into your code, database migration, or API request as needed.
Good to know
- UUID v4 is random—not sequential; use ULID or snowflake IDs if you need sortable keys.
- Regenerating replaces all values—copy important IDs before generating again.