ULID Generator
Create a 26-character, time-ordered unique ID in Crockford base32.
Quick answer: enter your details below and click Generate ULID — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
U
Converters & Utilities
Enter your details below.
How to use
- Choose how many ULIDs you need.
- Press Generate ULID.
- Copy the ID; later IDs will sort after earlier ones.
About this tool
ULID Generator creates identifiers that are both unique and sortable by creation time, which makes them handy for logs, events, and records that arrive in order. The first part encodes the timestamp and the rest is random, so IDs generated later sort after earlier ones. The Crockford base32 alphabet avoids confusing characters, keeping the ID readable when copied by hand.
Frequently asked questions
How is a ULID different from a UUID?
A ULID is time-ordered and uses a readable base32 alphabet, while a UUID is not ordered by time.
What characters are excluded?
I, L, O, and U are left out to avoid confusion with digits and to prevent accidental words.