DEV3 Redirect and HTTP Status Checker — Source Code (Next.js + MongoDB)

Source code of the DEV3 Redirect and HTTP Status Checker, a redirect tracer that follows each hop by hand, up to 10 hops, with status, Location and timing, for one URL or a bulk list of 20.

Download: buy a licence and the ZIP is waiting in Account → Downloads. Try it live: https://dev3.tech/tools/redirect-status-checker shows the finished tool running.

What is in the download

• Route handlers and pages for the Next.js App Router
• The service layer, Mongoose models and the UI components, in a dev3-tools/ folder that cannot clash with your own files
• README.md (install, environment, customise), .env.example and an MIT LICENSE

What the code does

• Manual redirect following with every hop re-validated against private ranges
• Loop and long-chain detection
• Per-hop timing and CSV export
• Injectable transport so it can be unit tested offline

Tech stack

Next.js 15 (App Router), React 19, TypeScript, Mongoose on MongoDB, Tailwind CSS 4.

Install and customise

The How to install and How to use tabs list the steps. In short: copy the module into a Next.js app, install the listed packages, add the MongoDB connection string and run it.

Good to know

• This is server code: you need a MongoDB database and your own hosting.
• HTTP redirects only; meta refresh and JavaScript redirects are not followed.