ULID Generator Online — Free & Private

A free edge API by formatho.com, privacy-first developer tools.

Open the full browser tool →

Free, no signup, runs entirely in your browser — your data never leaves your device.

🔓 Free 🔒 Zero tracking 🚫 No data collection ⚡ Edge-fast

Usage

curl "https://ulid-generator-formatho.filesformatho.workers.dev/api?count=5"
curl "https://ulid-generator-formatho.filesformatho.workers.dev/api?count=5&monotonic=true"
curl "https://ulid-generator-formatho.filesformatho.workers.dev/api?ulid=01ARZ3NDEKTSV4RRFFQ69G5FAV"

Full parameter reference and live response: /api endpoint.

What is a ULID?

A ULID (Universally Unique Lexicographically Sortable Identifier) is a 128-bit identifier that encodes a 48-bit millisecond timestamp plus 80 bits of crypto-secure randomness, written as 26 Crockford Base32 characters like 01ARZ3NDEKTSV4RRFFQ69G5FAV. ULIDs sort chronologically (great for database keys and URLs), are case-insensitive, and contain no confusing I/L/O/U characters.

Privacy-first: every request is processed in-memory on Cloudflare's edge and answered immediately. No logs, no analytics, no cookies, no data collection. See the Formatho privacy philosophy.

Full browser tool

Prefer a UI? Use the complete client-side version — generation happens right in your browser: ULID Generator on formatho.com.

All Formatho edge APIs

Browse every free Formatho Worker tool on the Formatho Tools index.