UUID / GUID Generator
Generate one or many random v4 UUIDs (GUIDs) instantly in your browser, using the same cryptographically secure randomness browsers use for everything else.
How this tool works
Choose how many UUIDs you need (up to 100 at once) and click Generate. Each one is a version 4 (random) UUID, formatted the standard way — 32 hexadecimal characters split into five groups by hyphens.
Why version 4?
UUIDs come in several versions with different generation strategies — version 1 encodes a timestamp and network identifier, version 4 is pure randomness. Version 4 is by far the most common choice for general-purpose unique IDs because it requires no coordination or configuration and reveals no information about when or where it was created.
Privacy by design
UUIDs are generated entirely in your browser using the Web Crypto API. Nothing is sent to a server, logged, or stored.
This tool runs entirely in your browser. Nothing you enter is uploaded or stored.
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