UUID Generator
Generate random UUID v4 (GUID) identifiers — one or hundreds at a time.
🔒 Uses the Web Crypto API on your device. Nothing is generated on a server or sent anywhere.
About this tool
This free tool generates version 4 UUIDs (Universally Unique Identifiers, also called
GUIDs). A UUID v4 is a 128-bit identifier formatted as
xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx, where 122 of the bits are random.
They are used as database keys, API request IDs, file names and session tokens.
Generation uses your browser's built-in crypto.getRandomValues() — a
cryptographically secure random source — so the UUIDs are suitable for anything from
test fixtures to production primary keys. Your device never contacts a server during
generation, so the values cannot leak.
Need hashes instead of unique IDs? Try the Hash Generator, or format API payloads with the JSON Formatter.