Free online NanoID generator. Generate short, unique, URL-friendly IDs instantly. Customize length, alphabet, and case. Bulk generate, copy to clipboard, or download. Perfect for URLs, database keys, and short identifiers. Pure client-side, no ads.
NanoID is a small, fast, and URL-friendly unique ID generator. Unlike UUIDs which are 36 characters long, NanoIDs are typically only 21 characters while maintaining similar collision probability. This tool generates NanoIDs entirely in your browser — no data is sent to any server.
NanoID is a tiny, secure, URL-friendly unique ID generator. It produces strings like "V1StGXR8_Z5jdHi6B-myT" that are only 21 characters long but have a similar collision probability to UUID v4.
NanoIDs are shorter than UUIDs (21 vs 36 characters) while maintaining similar uniqueness. They are also faster to generate and URL-safe by default. However, UUIDs are more widely standardized.
With the default 21-character length and alphabet size of 64, NanoID has a collision probability of about 1% after 149 billion IDs generated. For most practical purposes, this is effectively unique.
Absolutely. All NanoIDs are generated locally in your browser using the Web Crypto API. No data is sent to any server or stored anywhere.