UUID Generator
Generate universally unique identifiers (UUIDs/GUIDs)
Multiple Versions
Bulk Generation
Format Options
UUID Version
Randomly generated, most common
Generated UUIDs
1
Format Options
Preview:
00000000-0000-0000-0000-000000000000UUID Validator & Parser
UUID Versions
Version 4 (Random)
Most commonly used. 122 random bits provide extremely low collision probability.
Version 1 (Time-based)
Based on timestamp and MAC address. Can reveal creation time.
Version 7 (Unix Epoch)
Newer standard. Time-ordered and sortable, ideal for databases.
UUID Facts
Total possible v4 UUIDs:2¹²²
Collision probability:~1 in 2.71 quintillion
String length:36 characters
Bytes:16 bytes (128 bits)