NanoID Generator

Generates compact, URL-safe random IDs.

The NanoID Generator creates compact, URL-safe random IDs right in your browser. Set the length and how many IDs you want, and it produces short, collision-resistant identifiers using a 64-character URL-safe alphabet. It's a quick way to generate random IDs for database keys, tokens, or short links without reaching for a CLI or library.

Common uses

• Generating short, URL-safe unique IDs for database records or API resources
• Creating identifiers for short links or slugs that are safe to drop straight into a URL
• Seeding test data with batches of random IDs (up to 1000 at a time)
• Producing tokens or keys for client-side prototypes and quick scripts
• Generating an alternative to UUIDs when you want shorter strings

FAQ

Is my data sent to a server?

No. The generator runs entirely in your browser and uses the built-in crypto.getRandomValues API to produce randomness. Nothing is uploaded or transmitted anywhere.

What characters can appear in the generated IDs?

IDs use a fixed 64-character URL-safe alphabet: A-Z, a-z, 0-9, plus the hyphen (-) and underscore (_). Every character is safe to use in URLs without encoding.

What length and count limits apply?

Length can be from 1 to 512 characters and defaults to 21. Count can be from 1 to 1000 and defaults to 5. Values outside those ranges are clamped, and invalid input falls back to the default.

Are the IDs cryptographically random?

Yes. Each ID is built from bytes produced by the browser's crypto.getRandomValues, a cryptographically secure random source. Because the alphabet is exactly 64 characters, each byte maps uniformly to one character.

How are multiple IDs returned?

When you generate more than one ID, they are returned one per line, so you can copy the whole block or split it however you need.

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