Developer tool
UUID Generator.
Create cryptographically secure version 4 UUIDs in your browser. Nothing is sent to a server.
Generate identifiers locally.
UUIDs are useful when you need unique IDs without a database sequence, such as test fixtures, API payloads, or client-side records. This generator uses your browser’s built-in cryptographic random number generator.
Frequently Asked Questions
Everything you need to know about this tool, how it works, and privacy.
What UUID version does this create?
This tool creates random version 4 UUIDs using crypto.randomUUID in supported browsers.
Are these UUIDs generated securely?
Yes. The browser uses its cryptographic random-number generator to create each UUID.
Does the tool store generated UUIDs?
No. UUIDs are generated and kept only in the current browser page.