UUID Generator
Generate cryptographically secure v4 UUIDs instantly. Choose how many you need, generate with one click, and copy individual UUIDs or all at once.
UUID Generator
Generate cryptographically secure v4 UUIDs with one click
Generated UUIDs
5Uses crypto.randomUUID() — cryptographically secure, RFC 4122 compliant v4 UUIDs generated by the browser's built-in CSPRNG.
Format: xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx (y = 8, 9, a, or b)
About UUIDs
What is a UUID?
A Universally Unique Identifier (UUID) is a 128-bit label used for unique identification. v4 UUIDs are randomly generated with 122 random bits, making collisions virtually impossible.
RFC 4122
This tool generates RFC 4122 compliant v4 UUIDs. The 13th digit is always '4' (version) and the 17th digit is one of '8', '9', 'a', or 'b' (variant).
Common Uses
Database primary keys, API resource identifiers, session tokens, file names, distributed system IDs, and any scenario requiring unique identifiers without a central authority.
Free online UUID v4 Generator. Generate 1, 5, 10, or 20 cryptographically secure UUIDs using the browser's crypto.randomUUID() API. Copy individual UUIDs with per-row buttons or bulk copy all. Perfect for developers, database designers, and system architects.