Free UUID/ULID Generator
Generate universally unique identifiers (UUIDs and ULIDs) instantly. Perfect for databases, API keys, distributed systems, and any project that needs guaranteed unique IDs.
Unique IDs for Every Use Case
From database primary keys to distributed system identifiers, unique IDs are essential in modern software development. This tool generates cryptographically secure UUIDs and sortable ULIDs, ready to use in any application with a single click.
Frequently Asked Questions
UUIDs are 128-bit identifiers in a standard hex format (e.g., 550e8400-e29b-41d4-a716-446655440000). ULIDs are also 128-bit but are lexicographically sortable and encode a timestamp, making them better for database primary keys where sort order matters.
UUID v4 uses cryptographically secure random numbers, making the probability of a collision astronomically small — roughly 1 in 2^122. For all practical purposes, every generated UUID is unique.
Yes. You can specify how many identifiers to generate in a single batch and copy them all at once, which is handy when seeding databases or creating test fixtures.