c-url-shortener
An npm package that converts your long and non-long urls into short urls
id-shorter
A little module that replaces a long ObjectId value with short one keeping uniqueness. A charset for conversion is fully configurable and does not depend on requirement of 64 symbols. So it is possible to use only letters, letters+digits, digits etc.
kutt
Node.js & browser (TypeScript) client for Kutt url shortener