TOOLXILLAPRO
Developer Tools

NanoID Generator & Collision Calculator

Generate tiny, secure, URL-friendly unique identifiers. NanoID is more compact than UUID, faster, and safe to use in URLs without encoding.

Generated locally via Web Crypto API.
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How to Use NanoID Generator & Collision Calculator

1

Choose ID Length

Select length (default: 21 characters).

2

Select Alphabet

Use URL-safe (A-Za-z0-9_-), alphanumeric, numbers only, or custom alphabet.

3

Generate & Copy

Generate single or batch IDs and copy to clipboard.

About NanoID Generator & Collision Calculator

Uses crypto.getRandomValues() to sample uniformly from a 64-symbol URL-friendly alphabet, avoiding modulo bias through uniform mask calculation.

Supported Formats

NanoID

Operational Limits

  • •Generates client-side NanoID using Web Crypto API.

Key Features

  • CSPRNG cryptographic randomness
  • Custom alphabet and length support
  • Batch generation (1 to 500 IDs)
  • Collision probability estimation display
  • One-click copy and download

Frequently Asked Questions

NanoID is 21 characters long compared to UUID's 36 characters, is completely URL-safe, and uses a larger alphabet with equivalent collision resistance.

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