Nano ID is a tiny, secure, URL-friendly unique string generator that uses cryptographically strong random values.

How many IDs can I generate at once?

This tool supports bulk generation from 1 to 1000 IDs in one run.

Can I customize ID length and alphabet?

Yes. You can choose the ID length and define your own character alphabet for custom formats.

Create secure short unique IDs in your browser. Customize length and alphabet, generate in bulk, then copy or download instantly.

ID Length Amount (1-1000)

Alphabet

Tip: use unique characters only. Duplicate characters are automatically removed.

0 IDs

Based on birthday paradox approximation for generated count within one batch.

Yes. It uses crypto.getRandomValues in your browser, which is cryptographically strong randomness.

No generation happens server-side. IDs are created entirely in the browser.

21 characters with the default Nano ID alphabet is a strong general-purpose default.