Create Universally Unique Lexicographically Sortable Identifiers with a timestamp prefix and random suffix. Generate one or many ULIDs on your device.

How to use this tool

1. Choose how many ULIDs to generate. 2. Generate and copy IDs into your database seed, API fixture, or migration. 3. Prefer ULIDs when you need time-sortable unique keys without a central counter.

Worked example

Example: generating three ULIDs yields Crockford Base32 strings that sort by creation time when compared lexicographically.

How it works

Generate Universally Unique Lexicographically Sortable Identifiers (ULIDs) locally with a timestamp prefix and random suffix. ULIDs are never stored or sent to a server.

Limitations

Results are based on the inputs you provide and may not cover every edge case. This tool is for general use and is not professional advice.

Privacy and file handling

Your data stays on your device and is not uploaded.

FAQ

Frequently asked questions

Is ULID Generator free?

Yes. It is free to use and you do not need to sign in or create an account.

Is my data private?

See the privacy note on this page. Many tools run on your device; some heavier file tools may use secure temporary processing when required.

Can I use ULID Generator on mobile?

Yes. Open this page on your phone or tablet, enter your inputs, and use the on-screen controls.

Page last reviewed: March 1, 2026

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