NanoID Generator

NanoID Generator

The NanoID generator creates compact, URL-friendly unique identifiers directly in your browser. NanoID is a modern alternative to the UUID: it builds shorter strings from a customizable alphabet, so the IDs are easier to read, safe to drop into URLs, and cheaper to store. Set the size (how many characters each ID contains) and the alphabet (which characters are allowed), then generate a single ID or a whole batch at once. The common default is a 21-character ID drawn from a URL-safe alphabet.

How it works

The generator runs entirely on your device in JavaScript. You choose a length and character set, and each ID is assembled locally from a random source — nothing is ever requested from a server. Results show up instantly and copy with a single click, and you can regenerate as many times as you like. Because it is fully client-side, it works offline after the page loads and behaves identically across desktop and mobile browsers.

When to use NanoIDs

• Primary keys or record IDs that need to stay short.
• URL slugs, share links, and public-facing identifiers.
• Filenames, coupon codes, or invite tokens.
• Anywhere a full UUID feels longer than it needs to be.

Exploring other identifier options? Compare with the UUID Generator for RFC-standard IDs, the Password Generator for random secrets, or the Random Number Generator for numeric values.

Private by design

Every ID is generated locally and never uploaded. There is no account, no logging, and no tracking of what you create — the tool is free and completely private, so your identifiers stay on your machine.