The latest articles on DEV Community by Arhan Ahmad (@arhan_ahmad_a67ef7bd2b992). https://dev.to/arhan_ahmad_a67ef7bd2b992 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%2F4010774%2F192502fa-ff38-45ee-a6ad-f12613f6d8e2.png https://dev.to/arhan_ahmad_a67ef7bd2b992 en Arhan Ahmad Wed, 01 Jul 2026 10:45:32 +0000 https://dev.to/arhan_ahmad_a67ef7bd2b992/building-a-privacy-first-image-compressor-with-webassembly-1dfg https://dev.to/arhan_ahmad_a67ef7bd2b992/building-a-privacy-first-image-compressor-with-webassembly-1dfg <p>Most "free" image compressors upload your files to a server, cap you at 10 images, or watermark your output. I wanted something different.</p> <p>So I compiled Mozilla's mozJPEG, Google's libwebp, and libaom (AVIF) to WebAssembly using Emscripten. Each image compresses on a separate Web Worker, saturating all CPU cores. On an 8-core laptop, 8 images compress simultaneously. A batch of 200 photos finishes in seconds.</p> <p>No uploads. No limits. No data ever leaves your device.</p> <p><strong>Try it:</strong> <a href="https://toolboximage.com" rel="noopener noreferrer">https://toolboximage.com</a></p> webassembly javascript webdev performance