UUID Generator
Generate v4 UUIDs in bulk.
Basic UUID (v4)
Advanced UUID Batch
What is the UUID Generator?
A UUID generator produces 128-bit identifiers that are practically guaranteed not to collide, so separate systems can create IDs independently without coordinating. Version 4 UUIDs are random, which is what you want for database keys, request tracing and idempotency tokens.
Frequently asked questions
Are these UUIDs random enough to use as security tokens?
They come from the browser crypto API, so they are cryptographically random rather than pseudo-random. A v4 UUID has 122 random bits, which is plenty of entropy — but a UUID is an identifier, not a secret, so do not use one as a password or session token.
Will two generated UUIDs ever be the same?
The probability is negligible. You would need to generate on the order of a billion UUIDs per second for about 85 years to reach a 50% chance of a single collision.
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UUID Generator is one of 6 tools in Generators on Toolkit Hub, a free collection of browser-based utilities. It requires no account and no installation. Browse all tools.