A Developer's Guide to the ULID Generator & Validator

The ULID Generator & Validator is a tool for working with Universally Unique, Lexicographically Sortable Identifiers. ULIDs are a great alternative to UUIDs when you need your IDs to be sortable by the time they were created.

Generator Features

• Bulk Generation: Create multiple ULIDs at once by specifying the quantity you need.
• Timestamp Seeding: For testing or specific use cases, you can provide a Unix timestamp (in milliseconds) to generate ULIDs for a specific point in time.
• Easy Copying:
  • Copy a single ULID with one click.
  • Copy all generated ULIDs to your clipboard at once.

Validator Features

• ULID Validation: The tool checks if a given string is a valid ULID.
• Timestamp Decoding: For a valid ULID, it automatically decodes the embedded timestamp and displays it in a human-readable UTC format.

How to Use

Generator

1. Select the "Generator" Tab.
2. Set Quantity: Enter the number of ULIDs you want to generate.
3. (Optional) Set Seed: If you need to generate ULIDs for a specific time, enter the Unix timestamp in milliseconds into the "Seed Timestamp" field. Leave it blank to use the current time.
4. Generate: Click the "Generate" button. A new list of ULIDs will appear.
5. Copy: Copy individual ULIDs or the entire list using the dedicated buttons.

Validator

1. Select the "Validator" Tab.
2. Enter a ULID: Paste the ULID string you want to validate into the input field.
3. Click Validate: Press the "Validate" button.
4. Review the Result: An alert will appear, telling you if the ULID is Valid or Invalid. If it's valid, it will also show you the decoded timestamp.