Generate URL-safe unique IDs
NanoID is a popular way to create short, unique identifiers for database rows, URLs, filenames and API keys. It packs the same practical uniqueness as a UUID into fewer characters and only uses URL-safe symbols by default, so the IDs are safe to drop straight into links.
How to use it
- Set the length and how many IDs you want.
- Optionally customise the alphabet.
- Click Generate and copy the IDs.
Frequently asked questions
What is a NanoID? NanoID is a tiny, URL-safe unique-ID format — like a shorter UUID. The default 21-character ID has a collision probability comparable to a UUID v4.
How is it different from a UUID? NanoIDs are shorter, URL-friendly by default and let you customise the alphabet and length, while UUIDs have a fixed 36-character format.
Are the IDs secure/random? Yes — they use the browser’s cryptographically secure random generator, not Math.random.
Is anything sent to a server? No — IDs are generated entirely in your browser.