Developer UUID tools
JavaScript UUID Generator
Generate UUIDs for JavaScript and TypeScript projects, then review browser-native crypto.randomUUID() and validation patterns.
JavaScript UUID generator
Create UUID values in the browser for frontend fixtures, tests, API payloads, and documentation examples.
123e4567-e89b-42d3-a456-426614174000 123e4567-e89b-42d3-a456-426614174001 123e4567-e89b-42d3-a456-426614174002 123e4567-e89b-42d3-a456-426614174003 123e4567-e89b-42d3-a456-426614174004 123e4567-e89b-42d3-a456-426614174005 123e4567-e89b-42d3-a456-426614174006 123e4567-e89b-42d3-a456-426614174007 123e4567-e89b-42d3-a456-426614174008 123e4567-e89b-42d3-a456-426614174009
Generate 1 to 1000 IDs per batch.
Generated values stay in your browser. This page does not send UUIDs or GUIDs to a server for generation.
crypto.randomUUID() example
Modern browsers and current Node.js releases support crypto.randomUUID() for UUID v4 generation.
const id = crypto.randomUUID();
console.log(id);const uuidRegex =
/^[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
console.log(uuidRegex.test("123e4567-e89b-42d3-a456-426614174000"));getRandomValues fallback note
When crypto.randomUUID() is unavailable, generate random bytes with crypto.getRandomValues() and set the UUID version and variant bits correctly.
Avoid Math.random() for serious UUID generation. It is not designed for cryptographic randomness and can produce weaker identifiers.
FAQ
What is the easiest way to generate a UUID in JavaScript?+
Use crypto.randomUUID() when it is available. It returns a UUID v4 string.
Should I use Math.random() for UUIDs?+
Avoid Math.random() for serious UUID generation. Prefer crypto.randomUUID() or crypto.getRandomValues().
Does this page generate UUIDs client-side?+
Yes. The live generator runs in your browser and uses browser crypto APIs.