HTMLUUID 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.
Ctrl+Enter to run | Ctrl+K to switch tools | Recent button shows input history
Repeating this work? Turn this kind of browser utility into an API batch, MCP prompt, extension workflow, or shared team recipe.
Buy Pro Browse tool packsFAQ
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().