ULID Generator
Generate Universally Unique Lexicographically Sortable Identifiers for distributed systems.
About ULID
- Universally Unique Lexicographically Sortable Identifier
- 128-bit identifier compatible with UUID/GUID
- Sortable by creation time (like UUIDv1/v7) without exposing MAC address
- Uses Crockford's Base32 encoding (26 characters, no confusing chars)
- Monotonic within same millisecond (last char increments)
A ULID isn't a UUID at all, it's a different, older specification encoded in Crockford's Base32, twenty-six characters with no visually ambiguous letters like I, l, O, or 0, which makes it noticeably shorter than a standard UUID's thirty-six characters and genuinely easier to read aloud, type by hand, or reference in a support ticket without a stray typo silently pointing at the wrong record. This tool generates ULIDs, time-sortable identifiers built around compact, human-friendly encoding rather than the standard UUID hex format.
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Useful for generating an identifier that's actually practical to read aloud or type manually, choosing a shorter, sortable ID for a system where UUID's format isn't a hard requirement, or picking ULID specifically for its unambiguous character set over other time-sortable identifier formats.
Key features
- Clean interface
- Fast processing
- No signup required
- Works offline