Developer Tools
UUID Generator
Generate version-4 UUIDs in bulk — cryptographically random, one-click copy.
Version 4 UUIDs from your browser's cryptographic generator — collision odds are astronomically small.
About this tool
UUIDs (universally unique identifiers) label database rows, API resources and distributed events without a central counter. Generate 1–100 version-4 UUIDs at once, produced by your browser's cryptographic generator.
The 122 random bits of a v4 UUID make collisions astronomically unlikely — you could generate billions per second for decades before expecting a duplicate. Everything runs locally in your browser — nothing is uploaded, logged or stored.
How to use
- Choose how many UUIDs you need.
- Click Generate.
- Copy the list.
Frequently asked questions
The UUID variant built from random bits (vs. v1 which embeds time and machine identity). v4 is the default choice today.
Theoretically, but with 2¹²² possibilities the chance is negligible for any real workload.
No — they come from crypto.getRandomValues, not a seeded pseudo-random generator.