Nano ID Generator
Generate short URL-safe identifiers with a chosen alphabet.
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About this tool
Generates short URL-safe identifiers from a 64-character alphabet. Twenty-one characters gives collision odds comparable to a UUID while taking up far less room in a URL.
Limitations
- Shorter identifiers collide sooner. The tool shows the entropy so you can judge the tradeoff.
Questions
- How short can I go?
- Shorter means more collisions. At 21 characters the risk is negligible; below about 12 you should be checking for duplicates on insert.
Privacy
This page does its work in your browser. What you paste is processed by JavaScript running on your own device and is never sent to a DevToolery server — there is no server that could receive it. The page itself is a static file delivered by a CDN. See exactly what is stored.