The latest articles on DEV Community by Zain Choohan (@zain_choohan_8645033860ec). https://dev.to/zain_choohan_8645033860ec https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4194689%2F9b4d06c9-c574-4a84-b601-506b2e27035c.png https://dev.to/zain_choohan_8645033860ec en Zain Choohan Mon, 19 Oct 2026 18:32:25 +0000 https://dev.to/zain_choohan_8645033860ec/why-i-built-a-lightweight-ad-free-qr-scanner-using-web-technologies-4204 https://dev.to/zain_choohan_8645033860ec/why-i-built-a-lightweight-ad-free-qr-scanner-using-web-technologies-4204 <p>As a developer, I’ve always been fascinated by how we can solve daily problems with simple web tools. One such problem I encountered was the "QR Scanner Struggle."</p> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fb2ncxcnkxb8rsh7u1j15.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Farticles%2Fb2ncxcnkxb8rsh7u1j15.png" alt=" " width="800" height="800"></a><br> Most of the QR scanner apps available today are bloated. They take too much space, require unnecessary permissions, and are often riddled with intrusive ads. I thought, "Why can't we just use the browser?"</p> <p>So, I built Fast QR Scanner. My main goal was to keep it minimal and privacy-focused.</p> <p>Key Technical Decisions:</p> <p>Client-Side Processing: All the decoding happens right in the browser. No images are uploaded to a server, ensuring 100% privacy.<br> Zero Dependencies: I wanted the tool to be lightning-fast, so I avoided heavy libraries.<br> Responsive Design: Ensuring it works perfectly whether you are on a 4K monitor or a budget Android phone.<br> If you're looking for a clean, fast, and ad-free way to scan QR codes, feel free to check out my project here: <a href="https://qrcodescannar.com/" rel="noopener noreferrer">Fast QR Scanner</a></p> <p>I'm still working on adding a few more features (like a batch scanner). If you have any suggestions or feedback, please let me know in the comments!<br> I'm still working on adding a few more features (like a batch scanner). If you have any suggestions or feedback, please let me know in the comments!</p> webdev javascript productivity opensource