About NanoID
NanoID is a tiny, secure, URL-friendly unique ID generator — a modern alternative to UUID that produces shorter strings. This tool generates NanoIDs in your browser using a cryptographically secure random source; you choose the length and how many to create.
How NanoID Generator works
How to use it
- Set the length and how many to generate.
- Choose the URL-safe alphabet if you want.
- Generate and copy the IDs.
How it works
Each character is drawn from the alphabet using crypto.getRandomValues, so the IDs are unpredictable. With the default 21-character length, NanoID's collision resistance is comparable to UUIDv4 while being shorter.
Common uses
- Generate unique IDs
- Create short URL-safe IDs
- Make database keys
- Replace UUIDs with shorter IDs
- Generate tokens
- Create slugs or handles
- Bulk-generate IDs
- Get secure random IDs
Frequently asked questions
What is NanoID?
A small, secure, URL-friendly unique ID generator.
How is it different from UUID?
It produces shorter IDs with similar collision resistance.
Are the IDs secure?
Yes — they use a cryptographically secure random source.
Can I choose the length?
Yes — set any length from 2 to 64.
Are my IDs uploaded?
No — they are generated in your browser.
What is the default length?
21 characters.
Is it free?
Yes — completely free with no sign-up.