404 Detector
Overview
404 Detector is a Chrome extension that answers a small but annoying question every site owner has: are there broken links on this page? Instead of clicking every link by hand, the extension scans the page you are viewing and flags dead links in real time.
What it does
- Scans all links on the current page and checks their status
- Highlights broken (404) links so they are easy to spot
- Runs quietly in the background with a simple popup interface
How I built it
The extension is built on Chrome Manifest V3, the current extension standard, with a background service worker handling the link checks and a popup (popup.js) presenting the results. Building it taught me how modern browser extensions are structured: permissions, content scripts and the messaging between them.
Tech Stack
JavaScript, Chrome Extensions API (Manifest V3), HTML/CSS
A Closer Look
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