UUID / GUID Generator (v4 & v7)
Random v4 and time-ordered v7 UUIDs, in bulk.
About this tool
UUIDv4 is 122 bits of pure randomness — collision-proof for any practical purpose. UUIDv7 (RFC 9562, 2024) leads with a Unix timestamp so identifiers sort by creation time, which keeps database indexes happy. Both generate here in bulk from the browser CSPRNG.
Like everything on encrypt.tools, this runs entirely in your browser — nothing you enter is transmitted or stored.
Frequently asked questions about UUID Generator
What's the difference between UUID v4 and v7?+
v4 is fully random. v7 begins with a timestamp so IDs sort by creation time, which keeps database indexes efficient while staying practically collision-free.
Can UUIDs collide?+
For v4, the odds are astronomically low — 122 random bits. You'd need to generate billions per second for years to have any realistic chance of a collision.
Are these generated locally?+
Yes — they use your browser's secure random generator and are never sent anywhere.
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