NanoID Generator

How to use NanoID Generator

1. Open NanoID Generator — it runs entirely in your browser with no setup.
2. Paste or type your input into the text area, or upload a file where supported.
3. Set any options you need. The result appears in the output panel — there is no upload step and no waiting on a server.
4. Review the output instantly; large inputs are handled locally without lag.
5. Copy the result to your clipboard or download it. Your data never leaves the page.

Why use NanoID Generator?

• 100% free with no limits, no sign-up and no watermarks.
• Private by design — your data are processed in your browser and never uploaded to a server.
• Fast and lightweight, with instant results even on a phone or a slow connection.
• Works everywhere — any modern browser on Windows, macOS, Linux, Android or iOS.
• Part of a full generators suite, so related nanoid tasks are one click away.

What people use NanoID Generator for

• Generating a short, URL-safe unique identifier for a link shortener or a public-facing record.
• Producing IDs that are shorter than a UUID but carry comparable collision resistance.
• Creating a batch of identifiers for seed data or load testing.

NanoID Generator: limits and things worth knowing

• The default Nano ID is 21 characters from a 64-symbol alphabet, giving about 126 bits of randomness — comparable to a UUID v4's 122 bits, in 21 characters instead of 36.
• The alphabet is URL-safe (A-Za-z0-9_-), so IDs need no encoding in a path, a query string or a filename.
• Length is adjustable. Shortening it reduces collision resistance sharply: at 8 characters you should expect a collision within a few million IDs.
• Values come from the browser's cryptographically secure random number generator, not Math.random.

Is it private and secure?

Your privacy is built in. NanoID Generator runs completely on your device, so whatever you enter stays in your browser and is never transmitted, logged or stored on any server.

Network activity: none. Nothing is sent and nothing is fetched. This tool makes no network request at all once the page has loaded — which is why it keeps working if your connection drops.

You do not have to take that on trust — our privacy proof page publishes the Content-Security-Policy that enforces it, lists every third party it permits, and shows how to verify the whole claim yourself.

Learn more

Are Online Password Generators Safe? — A password generated on a server has been known to that server. Here's how to tell which generators are safe, and what actually makes a password strong.