What is ULID Generator?
ULID is a 128-bit identifier that is lexicographically sortable. It combines a 48-bit timestamp with 80 bits of random data, making it sortable by creation time while maintaining uniqueness.
Input Formats
- Quantity
Output Results
- List of ULIDs
Key Features
Sortable: Lexicographically sortable by generation time
URL Safe: Uses Crockford's Base32 encoding
No Special Chars: Alphanumeric only
High Precision: Millisecond precision
Who is this for?
Database Keys
Using ULIDs as primary keys for better indexing.
Primary keyDatabase indexing
How to Use
1
Enter the quantity of ULIDs to generate.
2
Click 'Generate'.
3
Copy or download the list.
Examples
Input
Quantity: 1Output
01ARZ3NDEKTSV4RRFFQ69G5FAVCommon Errors
- Confusing with UUID
Code Examples
JavaScript
import { ulid } from 'ulid';
console.log(ulid());Frequently Asked Questions
Why ULID over UUID?
ULIDs are sortable by time, which can improve database performance compared to random UUIDs.