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UUID Generator

Generate RFC 4122 version 4 UUIDs (universally unique identifiers) in your browser using the cryptographically secure crypto.randomUUID() API. Bulk-generate up to 100 at once. Format options: lowercase, UPPERCASE, no hyphens, or braces.

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FAQ

UUID Generator: questions

What is a UUID?
A UUID (Universally Unique Identifier) is a 128-bit identifier represented as 32 hex digits grouped 8-4-4-4-12. Version 4 UUIDs are randomly generated. With 2^122 possible values, the chance of collision is negligible.
Are these UUIDs cryptographically secure?
Yes — this tool uses crypto.randomUUID() (or crypto.getRandomValues() as a fallback), which is cryptographically secure random, not Math.random().
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