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Nano ID Generator

Generate compact random Nano ID values.

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Generate compact random Nano ID values.

Generated output will appear here.

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Tool guide

Free Nano ID Generator

Generate compact Nano ID-style random strings with a configurable length and quantity. IDs use browser cryptographic randomness and a fixed URL-friendly alphabet of letters, numbers, underscore, and hyphen.

Steps

How it works

  • Choose an ID length from 4 to 64 characters.
  • Choose a quantity from 1 to 100.
  • Generate the Nano ID-style values in your browser.
  • Copy the list or download it as a TXT file.

Highlights

Key features

  • Uses crypto.getRandomValues for random character selection.
  • Supports lengths from 4 through 64 characters.
  • Generates up to 100 IDs in one operation.
  • Uses a fixed 64-character URL-friendly alphabet.
  • Provides copy and text download actions.

Use cases

Common uses

  • Create compact IDs for test records and fixtures.
  • Generate sample keys for URLs or interface prototypes.
  • Prepare random strings for database and API testing.
  • Compare identifier lengths for an application design.

Notes

Limitations to know

  • The alphabet is fixed and cannot be customized.
  • Generated IDs are not checked for duplicates or stored in a registry.
  • Collision probability depends on ID length and the number of IDs created; shorter values collide more easily.
  • This implementation is Nano ID-style and does not import or claim exact compatibility with the official Nano ID package.
  • These identifiers are not passwords, encryption keys, or guaranteed-unique database constraints.

FAQ

Frequently asked questions

6 answers
What is the default Nano ID length?

The interface starts at 12 characters and allows lengths from 4 to 64.

Can I use a custom alphabet?

No. The current tool uses a fixed alphabet containing letters, numbers, underscore, and hyphen.

Are Nano IDs guaranteed unique?

No. Collision risk can be made very small with sufficient length, but uniqueness is not guaranteed.

Does the generator use secure randomness?

Yes. Character selection uses crypto.getRandomValues in the browser.

Can I generate Nano IDs in bulk?

Yes. Generate between 1 and 100 values at once.

How does length affect collision risk?

A longer ID provides many more possible combinations, reducing collision risk for the same number of generated values.

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