UUID Generator
Generate v4 and v7 UUIDs in bulk.
Hash & IDs
Hash & IDs
Runs offline
NanoID Generator
Generate compact, URL-safe unique IDs.
Output
0 charsCtrl↵to run
Questions
Why choose NanoID over a UUID?
It is shorter for the same collision resistance. A 21-character NanoID carries about 126 bits of entropy in 21 characters, where a UUID needs 36. The default alphabet is URL-safe, so IDs can go straight into a path without escaping.
How short can I safely go?
It depends on how many IDs you will generate. The collision estimate updates as you change the length and alphabet: aim for a figure comfortably beyond your expected lifetime volume. Below about 12 characters, collisions become a real design consideration rather than a theoretical one.
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