UUID Generator
Generate random version 4 UUIDs for database keys, test fixtures, or request IDs, up to 50 at a time.
Your input stays in your browser. Nothing is uploaded.
About this tool
A version 4 UUID is 128 bits written as 32 hex digits in the pattern 8-4-4-4-12. Six bits are fixed to mark the version and variant, and the other 122 are random. This page uses crypto.randomUUID where the browser supports it, or crypto.getRandomValues otherwise. With 122 random bits, the chance of two generated UUIDs colliding is negligible for practical purposes.
How to use it
- Choose how many UUIDs you need (1–50).
- Press Generate.
- Copy the list, one UUID per line.
xxxxxxxx-xxxx-4xxx-Nxxx-xxxxxxxxxxxx, where N is 8, 9, a, or b
Examples
Format
A typical result looks like 3f1c9b1e-2d4a-4c7e-9b1a-6f0e2c8d5a47. The 13th hex digit is always 4.
FAQ
Are these UUIDs unique?
They are random, not coordinated, but with 122 random bits a collision is extremely unlikely.
Can I use them as secrets?
They come from a cryptographic random source, but UUIDs are often logged and shown in URLs. For API keys or tokens, use the Random String Generator with a length that suits your needs.
Do you store the generated IDs?
No. They are created in your browser and never sent to SmartKitio.