UUID Generator
Runs in your browser — your data is never uploaded.
Generate one or hundreds of RFC 4122 version-4 UUIDs with a click. OkConverter uses your browser’s cryptographically secure random generator (crypto.randomUUID), the same primitive production systems rely on — not a seeded pseudo-random shim. Generation is instant and local; copy the list or download it as a text file.
How to use UUID Generator
- 1
Choose how many UUIDs you need (1 to 1000).
- 2
Click “Generate” — each UUID comes from your browser’s secure random source.
- 3
Copy the list to your clipboard, or download it as a .txt file (one per line).
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Frequently asked questions
What version of UUID does this generate?+
Version 4 (random) — the format in the pattern xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx, where 122 bits are cryptographically random. It’s the right default for database keys, request IDs, and correlation tokens.
Can two generated UUIDs collide?+
The probability is vanishingly small — you’d need to generate about 2.7×10¹⁸ UUIDs for even a 50% chance of one collision. For practical purposes, v4 UUIDs are unique.
Are these UUIDs generated securely?+
Yes — via crypto.randomUUID(), backed by your operating system’s CSPRNG, and entirely on your device. No server ever sees or logs them.
Should I use UUID v4 or v7?+
v4 is fully random; v7 embeds a timestamp so IDs sort by creation time, which can improve database index locality. If you don’t have that specific need, v4 is the standard choice.