Trace URL 
Trace URL helps you expand shortened URL into original URL or trace any URL with redirections towards the destination. If you want to use it without deploying the code, you can visit https://traceurl.catchen.app/.
Source Code Repositories
This repository contains the code for the web user interface. traceurl-api contains the code for the web API and it's deployed on Heroku. traceurl is the library used in the API to follow URL redirections.