qevroUUID Generator
Generate random UUIDs (v4) instantly.
d20139f1-e4ab-4eba-b4f6-37b892e2ff41
About UUIDs
What is a UUID?
UUID (Universally Unique Identifier) is a 128-bit identifier that is guaranteed to be unique across space and time. Version 4 UUIDs (what this tool generates) use random numbers, making collisions astronomically unlikely — about 1 in 2^122.
UUID Format
A UUID looks like: 550e8400-e29b-41d4-a716-446655440000. It consists of 32 hexadecimal characters in 5 groups separated by hyphens (8-4-4-4-12). The version number (4) appears in the third group.
When to Use UUIDs
Use UUIDs as database primary keys (especially in distributed systems), API resource identifiers, session tokens, correlation IDs in microservices, file names to avoid collisions, and any case where you need a unique ID without coordination between systems.