UUID / ULID Generator
Generate universally unique identifiers for your applications
Format
UUID v4
Length
36 chars
Timestamp
N/A
Understanding Unique Identifiers
Different ID formats and when to use them
UUID v4
Randomly generated 128-bit identifiers. The most commonly used UUID version with extremely low collision probability. Ideal for client IDs, session tokens, and database primary keys.
UUID v7
Time-ordered UUIDs that embed a Unix timestamp in the first 48 bits. They are sortable by creation time, making them excellent for database indexing while maintaining uniqueness.
ULID
Universally Unique Lexicographically Sortable Identifiers. 128-bit compatible with UUID, encoded in Crockford Base32 for a compact 26-character string that is URL-safe and sortable.
Need unique IDs for your auth system?
AuthAction automatically generates secure, unique identifiers for users, sessions, tokens, and API keys.