The latest articles on DEV Community by Nzuki Mwaniki (@nzuki_mwaniki). https://dev.to/nzuki_mwaniki https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3753064%2F5fdb5a60-c880-4c57-a090-fed785c06f30.png https://dev.to/nzuki_mwaniki en Nzuki Mwaniki Wed, 04 Feb 2026 16:03:59 +0000 https://dev.to/nzuki_mwaniki/how-i-built-a-privacy-first-image-pdf-converter-in-less-than-48-hours-no-backend-18j9 https://dev.to/nzuki_mwaniki/how-i-built-a-privacy-first-image-pdf-converter-in-less-than-48-hours-no-backend-18j9 <p>Every time I needed to shrink a PNG for a PR or extract images from a PDF, I ended up on shady sites with ads, tracking, and file uploads. So I built <a href="https://swiftpix.nzuki.com/" rel="noopener noreferrer">Swiftpix</a> — a dead-simple, client-side tool that does it all in your browser.</p> <p>What it does</p> <ul> <li>Convert between JPG, PNG, WebP PDF</li> <li>Resize images (width/height, %, or fit)</li> <li>Drag &amp; drop or paste files — no login, no server How it works</li> <li>PDF parsing: <code>pdf.js</code> (Mozilla’s open-source library)</li> <li>Image ops: HTML5 Canvas + <code>createImageBitmap</code> </li> <li>File handling: Native File API + Blob URLs</li> <li>Zero external requests — everything runs locally</li> </ul> <p>Why developers love it</p> <ul> <li>✅ No cost to host (static site only)</li> <li>✅ Works offline after first load</li> <li>✅ Respects user privacy (files never leave the browser)</li> <li>✅ Lightweight (~50KB total)</li> </ul> <p>Try it<br> 👉 <a href="https://swiftpix.nzuki.com/" rel="noopener noreferrer">https://swiftpix.nzuki.com/</a></p> <p>(P.S. I’m also available for AI/automation projects — helping startups ship faster. <a href="https://velocity-ai-solutions.nzuki.com/" rel="noopener noreferrer">velocity-ai-solutions.nzuki.com</a>)</p> webdev privacy tool javascript