UUID Generator
Generate random UUID v4 identifiers in bulk. Customize format with hyphens, uppercase, and copy with one click.
Frequently Asked Questions
What is a UUID v4?▾
A UUID v4 (Universally Unique Identifier version 4) is a 128-bit identifier generated using random or pseudo-random numbers. It follows the format xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx where y is 8, 9, a, or b.
Are the generated UUIDs truly unique?▾
Yes. UUIDs are generated using the Web Crypto API which provides cryptographically secure random values. The probability of a collision is astronomically low.
Can I generate multiple UUIDs at once?▾
Yes. Use the count slider to generate up to 100 UUIDs in a single click. All generated UUIDs can be copied to your clipboard at once.
Is my data safe when using this UUID generator?▾
Yes. All UUID generation happens entirely in your browser using the Web Crypto API. No data is ever sent to a server.