A simple Node.js script for checking HTTP redirects across large lists of URLs. The script reads URLs from a text file, sends requests without following redirects, and exports the results to a CSV file.

1. Put your URLs in the urls.txt file, one URL per line.
2. Run the script:

   node script.js

3. The script generates a results.csv file with three columns:
   • url — the original URL
   • status — the HTTP status code
   • redirect_to — the value of the Location header (if present)

Node.js 18+ (uses the built-in fetch API)

• Processes large URL lists (1000+ entries)
• Detects redirects without following them
• Outputs clean CSV results
• Minimal dependencies

redirect-checker/
  ├── script.js
  ├── urls.txt
  ├── results.csv (generated)
  ├── package.json
  ├── .gitignore
  └── README.md

For testing purposes, you may use endpoints from httpbin.org:

https://httpbin.org/status/200
https://httpbin.org/redirect-to?url=https://example.com
https://httpbin.org/redirect/2
https://httpbin.org/status/404
https://httpbin.org/status/500