UUID Generator
Generate UUID v4 identifiers in your browser.
UUID Generator creates cryptographically strong UUID version 4 identifiers using the Web Crypto API. Generate one or many at once for IDs, keys, and testing — all locally.
Frequently Asked Questions
Does my text leave the browser?
No. This tool runs entirely in your browser. Nothing is uploaded to our servers.
Are these UUID v4?
Yes. Each ID is a random UUID version 4 from crypto.randomUUID() (or equivalent).
Are generated UUIDs unique?
Collision risk for v4 UUIDs is astronomically low for normal use. They are suitable as opaque IDs.