ID
UUID Generator
Bulk-generate random UUID v4 identifiers using the browser's cryptographically secure random source. Toggle uppercase output and hyphens, and copy the whole batch at once.
0 UUID v4
🔒 This tool runs entirely in your browser. Your data is never uploaded.
Frequently asked questions
What kind of UUIDs does this generate?＋
RFC 4122 version-4 UUIDs, which are random. Each carries 122 random bits, so collisions are astronomically unlikely.
Are the UUIDs cryptographically random?＋
They use the browser's secure random source, so they're unguessable identifiers. A UUID on its own still shouldn't be used as a password or auth token.
Can I generate many at once?＋
Yes — create thousands in one go, and toggle uppercase or strip hyphens to match your system's expected format.