Nano ID Generator

What is a Nano ID?

A Nano ID is a compact, secure, and URL-friendly unique string identifier. It is designed to be a shorter alternative to traditional UUIDs, maintaining strong randomness while explicitly minimizing collision risks via robust modulo bias resistance.

How this tool works

This tool generates Nano IDs directly inside your browser using a cryptographically secure random number generator (Web Crypto API). Each identifier is minted by uniformly selecting values from the final alphabet pool resolved by your active settings.

You can fully customize the output structure by modifying the token length, toggling standard character sets (a-z, A-Z, 0-9, safe symbols), or injecting your own custom character pools.

Alphabet Assembly & Security

The generation engine dynamically resolves your character pool based on active selections. If no standard set is selected, the engine falls back exclusively to your extra characters field. If the final resolved alphabet pool drops below 4 unique characters, token minting is automatically halted by the telemetry pipeline to prevent low-entropy identifiers.

Why use Nano IDs?

• Compact Footprint — significantly shorter than a standard UUID while offering equivalent cryptographic uniqueness.
• Alphabet Flexibility — absolute freedom to fine-tune the character set layout for specialized environments.
• URL-Friendly — utilizes an alphabet that is natively safe for web URLs, parameters, and application routing.
• Secure Client-Side Execution — leverages native hardware-level client entropy via the Web Crypto API (crypto.getRandomValues).

Open Source & Libraries

The core generation and sorting mechanics powering this web utility are fully open-source. You can explore, inspect, and integrate the free IdCraft.js library on GitHub directly into your own JavaScript projects.