TOOL
UUID Generator
Generate cryptographically random version 4 UUIDs, one or in bulk. Runs locally.
Processing happens locally in your browser. Nothing you type is sent to BlackhawkHub.
How to use it
Choose how many UUIDs you want (up to 1000) and generate them. Copy the whole list with one button.
What they are for
A version 4 UUID is a 128-bit identifier that is almost certainly unique without any central coordination, because 122 of its bits are random. That makes UUIDs ideal as database keys, request IDs, session identifiers and idempotency keys in distributed systems where two components must not accidentally choose the same ID. These are generated from your browser's cryptographic random source and never leave your device.
Frequently asked questions
What is a version 4 UUID?
A 128-bit identifier with 122 random bits, written as 32 hex digits in five groups (8-4-4-4-12). The chance of two randomly generated v4 UUIDs colliding is negligibly small, so they are used as unique keys without coordination.
Are these UUIDs cryptographically random?
Yes. They use the browser's crypto.randomUUID() or crypto.getRandomValues(), which draw from a cryptographic random source. They are generated in your browser and not stored or transmitted.