Developer Tools
UUID / GUID Generator
RFC4122 UUID v4 in bulk, generated locally in your browser — no network requests at all
Count
UUID and GUID
A UUID (Universally Unique Identifier) is defined by RFC4122: a 128-bit identifier, usually written as xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx. GUID (Globally Unique Identifier) is Microsoft’s name for the same thing — the format is identical, it is just written in uppercase by convention.
This tool generates UUID v4, the random-number version, using the browser’s built-in crypto.randomUUID(). No server-side API is involved.
Formats
- Standard UUID (lowercase, with hyphens):
550e8400-e29b-41d4-a716-446655440000 - GUID style (uppercase, with hyphens):
550E8400-E29B-41D4-A716-446655440000 - Without hyphens (common for database keys):
550e8400e29b41d4a716446655440000