NanoID Generator — Short Unique IDs
Short, URL-friendly IDs with your own length and alphabet — plus a live collision-probability calculator.
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Help shape NanoID Generator — Short Unique IDs
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Frequently Asked Questions
As short as you like, but collisions grow fast. The tool shows how many IDs you can create before a 1% chance of a duplicate — pick a length that fits your volume.
Yes. It uses the same mask-and-reject method as the reference nanoid library, so every character is equally likely with any alphabet size.
Pick the “No look-alikes” alphabet or type your own.
No. IDs are generated in your browser.