UUID Generator

Three options: version 4 random UUIDs (the default and the most common choice), version 1 timestamp-based UUIDs, and the nil UUID of all zeros used as a placeholder value. The quantity slider produces up to 100 at a time.

A version 4 UUID contains 122 random bits, so the chance of two values matching is astronomically small. You could generate billions of UUIDs and still be extremely unlikely to ever see a duplicate; treat them as unique for any practical purpose.

Standard dashed form, simple form without dashes, uppercase, wrapped in braces, or wrapped in quotes, which covers the formatting conventions of different systems and languages.

When you generate a single UUID, a detail card breaks out its length, version digit, and variant (such as RFC 4122), and for version 1 UUIDs it decodes the embedded timestamp into a readable date.

They are generated in your browser with the standard random number generator, which is ideal for identifiers, database keys, and development work. For secrets like API tokens, use a dedicated cryptographic password generator instead.