CUID Generator

A CUID is a collision-resistant unique identifier designed for distributed systems where many machines mint ids at once without coordinating.

Unlike a UUID, a CUID2-style id is a compact, lowercase, URL-safe string that always begins with a letter, so it slots cleanly into URLs, filenames, CSS selectors, database keys and React list keys without escaping or quoting.

This generator builds ids in that style by mixing the current time, a per-id counter and fresh randomness into a base-36 string, so each value is hard to guess and extremely unlikely to clash even across a large batch.

You control the length from 2 to 32 characters — 24 is the common default — and how many ids you want, up to a thousand at a time.

Press Regenerate to mint a fresh set whenever you need them; the counter guarantees every id in a batch is distinct even though they share the same millisecond.

The result is shown one id per line so you can paste it straight into a seed file, a test fixture or a spreadsheet, and a single click copies the whole list.

Everything is generated locally in your browser using the built-in random source.

Nothing is uploaded, logged or stored, so it stays private and works offline once the page has loaded.

Note that these ids are meant for uniqueness, not as security tokens or secrets.