UUID Generator

UUID v4 Generator

Generate cryptographically random UUID v4 identifiers in bulk with format options. All generation happens locally in your browser.

Count:max 100

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What is UUID v4?

UUID v4 (Universally Unique Identifier version 4) is a randomly generated 128-bit identifier. It follows the format xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx where 4 indicates the version and y is one of 8, 9, a, b.

Collision Probability

With 2¹²² possible values (~5.3 × 10³⁶), the probability of generating two identical UUIDs is astronomically low. You would need to generate ~2.71 quintillion UUIDs to have a 50% chance of a collision.

Privacy Notice

All UUIDs are generated locally using crypto.randomUUID(). Nothing is sent to any server.