UUID Generator
Generate cryptographically random UUID v4 identifiers. Bulk generate up to 100 at once.
About UUID v4
A UUID v4 is a 128-bit randomly generated identifier in the format xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx. The probability of a collision is astronomically low, making UUIDs safe for use as unique keys in databases, distributed systems, and APIs.
Frequently asked questions
Is UUID v4 truly random?
UUID v4 uses the browser's cryptographically secure random number generator (crypto.getRandomValues). This is the same source used for cryptographic operations and is far stronger than Math.random().
What is the difference between UUID v1 and v4?
UUID v1 is generated from the MAC address and current timestamp, making it potentially traceable. UUID v4 is fully random with no identifiable information, making it better for privacy-sensitive use cases.
Are the UUIDs stored?
No. Generation happens entirely in your browser. No UUIDs are sent to or stored on any server.
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