Generate ULID (Universally Unique Lexicographic Sortable Identifier) strings that are time-sortable and globally unique.
The ULID Generator by TooliFyra creates Universally Unique Lexicographic Sortable Identifiers (ULIDs). ULIDs are an alternative to UUIDs that are lexicographically sortable, making them ideal for database primary keys and distributed systems.
ULIDs are 128-bit identifiers encoded as 26 characters using Crockford's Base32. They contain a 48-bit millisecond timestamp and 80 bits of randomness, ensuring both uniqueness and time-based sorting.
ULIDs solve the main problem with UUID v4: they are sortable by creation time. This makes them ideal for database indexes, event sourcing, and log aggregation where chronological order matters. The ULID Generator makes it easy to create these modern identifiers.
Database Design: Use as primary keys that are both unique and chronologically sortable.
Event Sourcing: Create event IDs that maintain temporal ordering.
Log Aggregation: Generate correlation IDs that sort by creation time.
API Design: Use as resource identifiers in REST and GraphQL APIs.
TooliFyra generates ULIDs using cryptographically secure randomness with millisecond-precision timestamps. The lexicographic sorting property makes ULIDs superior to UUIDs for most modern applications.
A ULID is a 128-bit identifier encoded as 26 Crockford Base32 characters. It contains a timestamp and random component, making it both unique and sortable.
ULIDs are lexicographically sortable by creation time, shorter (26 chars vs 36), and use a URL-safe character set. They are ideal for database keys.
Yes. The first 10 characters of a ULID encode the millisecond timestamp. TooliFyra includes a decoder that shows the creation time.