ULID Generator
ULID (Universally Unique Lexicographically Sortable Identifier) is a modern unique identifier generation scheme. It serves as an alternative to UUID, offering advantages such as time-based sorting and better readability.
Main Features
- Time-Sortable: ULIDs are sorted by time, facilitating database indexing and queries
- Uniqueness: Uses random numbers to ensure global uniqueness
- Friendly Format: Uses Crockford's Base32 encoding, avoiding ambiguous characters
- Fixed Length: Each ULID is 26 characters long
- Contains Timestamp: First 10 characters encode millisecond-precision timestamp
How to Use
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Quantity Setting:
- Use the input box to set the number of ULIDs to generate (1-100)
- Default generates 5 ULIDs
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Format Selection:
- Raw format: One ULID per line
- JSON format: Output as JSON array
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Operation Buttons:
- Click "Generate" button to create new ULIDs
- Click "Copy" button to copy results to clipboard
Use Cases
- Database primary key generation
- Unique identifiers in distributed systems
- Time-sortable identifiers
- Log event IDs
- File naming
Technical Details
- All generation processes are performed locally in the browser
- Uses standard ULID algorithm
- Supports batch generation
- Guarantees time ordering and uniqueness
Usage Recommendations
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For Database Applications:
- Raw format recommended
- Can be used directly as primary keys
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For API Development:
- JSON format available
- Convenient for API responses and processing
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For Batch Generation:
- Set reasonable quantities
- Be mindful of timestamp continuity