Why ULID over UUID
A ULID encodes the same 128 bits as a UUID but as Crockford Base32 — case-insensitive, free of ambiguous characters, and lexicographically sortable by creation time out of the box.
ULID Generator
Generate lexicographically sortable, 26-character ULIDs directly in your browser. Nothing is uploaded.
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0 IDs
Generated and inspected locally. Nothing is uploaded.ULID
Structure
The first 10 characters encode a 48-bit millisecond timestamp; the remaining 16 encode 80 bits of randomness.
Frequently asked questions
ULIDs decode and compare as plain strings — no library-specific parsing is required to sort them.