UUID Generator
Generate random UUID v4 / GUID values, one or in bulk.
🔒 Runs entirely in your browser — nothing is uploaded.
How UUID Generator works
How does the UUID generator work?
It calls the browser's native crypto.randomUUID() method directly, with no external library involved, which produces a cryptographically random RFC 4122 version 4 UUID using the Web Crypto API's secure random number generator. One UUID is generated automatically the moment the page loads.
What are these UUIDs used for?
They are commonly used as unique IDs for database records and primary keys, test fixtures, or placeholder identifiers during development, anywhere you need a value that will not collide.
Is there a limit on how many I can generate at once?
Yes - the count field is clamped between 1 and 100 with Math.min/Math.max, so a single click of Generate will not produce more than 100 at a time. For larger batches, click Generate again to get a fresh set.