NanoID Generator
Generate short, URL-friendly unique identifiers similar to NanoID. These compact IDs use a larger alphabet (A-Z, a-z, 0-9, -, _) than UUIDs, so they pack more entropy into fewer characters. A 21-character NanoID has the same collision probability as a UUID v4.
Frequently Asked Questions
›What is NanoID?
NanoID is a tiny, URL-friendly unique ID generator. It uses a 64-character alphabet (A-Za-z0-9_-) and crypto-random generation. A 21-character NanoID has ~126 bits of entropy — comparable to UUID v4's 122 bits but in fewer characters.
›NanoID vs UUID — which should I use?
Use NanoID when you need shorter IDs (21 chars vs 36), URL-safe characters, and don't need UUID compatibility. Use UUID when you need a standardized format, version/variant encoding, or compatibility with existing UUID infrastructure.
›Is NanoID cryptographically secure?
Yes. NanoID uses crypto.getRandomValues() for random number generation, the same cryptographically secure API used by UUID v4.