How it works
Choose how many UUIDs you want and click Generate. Each is a version-4 (random) UUID produced from your browser's cryptographically secure random source, using the built-in crypto.randomUUID where available and a secure fallback otherwise. Toggle uppercase or remove the dashes to match the format your system expects. UUIDs are ideal as database keys, request IDs, or file names because collisions are practically impossible. Everything runs locally in your browser.
UUID Generator
Random version-4 UUIDs (GUIDs), generated securely.
FAQ
What is a UUID?
A UUID (Universally Unique Identifier), also called a GUID, is a 128-bit value written as 32 hexadecimal digits in five dash-separated groups. It's used as an identifier that's practically guaranteed to be unique without a central authority.
Which version does this generate?
Version 4 — random UUIDs. They're produced from your browser's cryptographically secure random source, using crypto.randomUUID where available.
Can I get uppercase or dash-free UUIDs?
Yes. Toggle uppercase to capitalize the hex digits, and toggle "remove dashes" for a compact 32-character form.
Are they truly unique?
Version-4 UUIDs have 122 random bits, so the chance of a collision is astronomically small — for practical purposes they can be treated as unique.
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