Instant Online ULID Generator Tool
Generate sortable, unique identifiers with timestamp integration. Perfect for distributed systems and databases.
How to Use Our ULID Generator
Creating universally unique lexicographically sortable identifiers is simple with our comprehensive ULID generator. Whether you need single IDs for testing or bulk generation for database seeding, follow these four easy steps to generate ULIDs tailored to your specific requirements.
Choose Mode
Select from single generation, bulk creation, timestamp decoding, or UUID conversion.
Set Parameters
Configure your generation settings like quantity for bulk or input for conversion.
Generate IDs
Click the generate button to create ULIDs with embedded timestamps instantly.
Copy or Export
Copy individual IDs or download bulk generations for immediate use in your projects.
Powerful Features for ID Generation
Our ULID generator is equipped with advanced features designed to create sortable, unique identifiers perfect for distributed systems. From single generation to bulk creation, every feature is crafted to provide you with reliable, timestamp-embedded identifiers.
Instant Single Generation
Generate individual ULIDs with embedded timestamps instantly, perfect for testing and development workflows with immediate timestamp extraction.
Bulk Generation
Create up to 1000 ULIDs at once for database seeding, testing suites, or large-scale applications with downloadable text file export.
Timestamp Decoding
Extract and decode embedded timestamps from any ULID to view creation time in multiple formats including ISO and localized dates.
UUID Conversion
Seamlessly convert between UUID and ULID formats for compatibility with existing systems and migration scenarios.
Export Functionality
Download bulk generated ULIDs as text files for easy integration into your development workflow and database scripts.
One-Click Copy
Copy generated ULIDs to your clipboard instantly with convenient copy buttons for immediate use in your applications.
Benefits of Using ULID
Discover why developers and database architects trust ULIDs for distributed systems and modern applications. From lexicographic sorting to timestamp embedding, ULIDs offer numerous advantages over traditional UUID implementations.
- Lexicographically sortable identifiers that maintain chronological order in databases
- Embedded timestamps allow extraction of creation time without additional metadata
- Case-insensitive encoding using Crockford's Base32 for URL-safe identifiers
- Perfect for distributed systems with no coordination required between nodes
- Compact 26-character string representation compared to 36-character UUIDs
- Monotonically increasing within the same millisecond for better database indexing
- Compatible with UUID systems through conversion for seamless migration
- Cryptographically secure random component ensures uniqueness across systems
Frequently Asked Questions
Find answers to common questions about ULIDs and our generator tool. Learn how to get the most out of ULIDs for your distributed systems and database applications.
What is a ULID and how does it differ from UUID?
ULID (Universally Unique Lexicographically Sortable Identifier) is a 128-bit identifier like UUID, but with embedded timestamps and lexicographic sorting. Unlike UUIDs, ULIDs maintain chronological order when sorted as strings, making them ideal for database indexing.
Are ULIDs truly unique across distributed systems?
Yes, ULIDs combine a 48-bit timestamp with 80 bits of cryptographically secure randomness, ensuring uniqueness across distributed systems without coordination. The probability of collision is astronomically low, similar to UUIDs.
Can I use ULIDs as database primary keys?
ULIDs are excellent for database primary keys because they're sortable, which improves index performance. Their chronological ordering reduces index fragmentation compared to random UUIDs, leading to better database performance.
How do I extract the timestamp from a ULID?
Use our Decode Timestamp tab to extract the embedded timestamp. The first 10 characters of a ULID encode the millisecond-precision timestamp, which our tool decodes into human-readable date formats including ISO 8601.
What is Crockford's Base32 encoding?
Crockford's Base32 is a human-friendly encoding that uses 32 characters (0-9 and A-Z, excluding I, L, O, U) to avoid visual confusion. It's case-insensitive and URL-safe, making ULIDs easy to use in web applications.
Can I convert existing UUIDs to ULIDs?
Yes, use our UUID Conversion tab to convert between formats. However, note that converted UUIDs won't have meaningful timestamps since UUIDs don't embed time information in the same way ULIDs do.
How many ULIDs can I generate in bulk?
Our tool supports bulk generation of up to 1000 ULIDs at once. You can download the results as a text file for easy integration into database seeding scripts or testing frameworks.
Are ULIDs suitable for security-sensitive applications?
ULIDs use cryptographically secure random number generation for the random component, making them suitable for most applications. However, the embedded timestamp is visible, so avoid using ULIDs where timestamp disclosure is a security concern.