The latest articles on DEV Community by DevBlocks42 (@devblocks42). https://dev.to/devblocks42 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%2F3964981%2Fe87bc3d4-99c0-4574-8034-ef5593c41687.png https://dev.to/devblocks42 en DevBlocks42 Tue, 02 Jun 2026 16:12:48 +0000 https://dev.to/devblocks42/i-built-a-free-online-pdf-and-image-toolkit-no-signup-no-tracking-30l5 https://dev.to/devblocks42/i-built-a-free-online-pdf-and-image-toolkit-no-signup-no-tracking-30l5 <p>A few weeks ago, I built a small web tool because I needed something simple: a way to manipulate PDF and image files without installing heavy software or creating accounts.</p> <p>Most existing tools felt either:</p> <ul> <li>overly complicated</li> <li>behind paywalls</li> <li>or full of ads and tracking</li> </ul> <p>So I decided to build my own lightweight alternative.</p> <h2> What I built </h2> <p>It's a free online toolkit that runs entirely in the browser/backend, allowing users to process common file tasks:</p> <ul> <li>Convert images to PDF or other image formats</li> <li>Merge multiple PDF files into one</li> <li>Add password protection to PDF files (using encryption)</li> </ul> <p>Everything is designed to be fast, minimal, and accessible from any device.</p> <h2> Why this project exists </h2> <p>The main goal was simplicity.</p> <p>I wanted:</p> <ul> <li>no account creation</li> <li>no email collection</li> <li>no hidden paywalls</li> <li>a tool that just works</li> <li>GDPR compliant tool</li> </ul> <p>It’s mainly built for quick everyday tasks like:</p> <ul> <li>sending documents</li> <li>organizing PDFs</li> <li>converting images for administrative use</li> </ul> <h2> Tech stack </h2> <p>The project is built with:</p> <ul> <li>FastAPI (backend)</li> <li>Nginx (reverse proxy)</li> <li>Cloudflare (DNS + security layer)</li> <li>Vanilla HTML/CSS/JS frontend</li> </ul> <p>The focus was more on performance and simplicity than on heavy frontend frameworks.</p> <h2> What I learned </h2> <p>Building a “simple tool” is surprisingly complex when you consider:</p> <ul> <li>file handling safely</li> <li>performance for large files (asynchronous jobs and event queue)</li> <li>keeping the UI minimal but usable</li> <li>making everything work across devices</li> </ul> <h2> Live demo </h2> <p>You can try it here:</p> <p><a href="https://universal-converter.fr.eu.org?language=en" rel="noopener noreferrer">https://universal-converter.fr.eu.org?language=en</a></p> <p>Or in french language here: </p> <p><a href="https://universal-converter.fr.eu.org/?language=fr" rel="noopener noreferrer">https://universal-converter.fr.eu.org/?language=fr</a></p> <h2> Future improvements </h2> <p>I plan to add:</p> <ul> <li>more image formats support</li> <li>PDF compression</li> <li>OCR features</li> <li>OMR features using Audiveris</li> <li>mobile UX</li> </ul> <h2> Feedback welcome </h2> <p>If you have suggestions or ideas for useful features, feel free to share them.<br> I’m mainly improving this project based on real usage.</p> privacy productivity showdev webdev