The latest articles on DEV Community by El lord (@el_lord_178eacaf0e32650c0). https://dev.to/el_lord_178eacaf0e32650c0 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%2F4161388%2F1cec30ce-2475-4c9a-a5a2-1a9eb76447f8.jpg https://dev.to/el_lord_178eacaf0e32650c0 en El lord Sun, 04 Oct 2026 10:20:12 +0000 https://dev.to/el_lord_178eacaf0e32650c0/126-private-in-browser-web-pdf-tools-every-developer-needs-4j4f https://dev.to/el_lord_178eacaf0e32650c0/126-private-in-browser-web-pdf-tools-every-developer-needs-4j4f <p>Most online converters and PDF tools upload your sensitive documents, API keys, and contracts to remote cloud servers. For private data, that is a security risk.</p> <p>I built <strong><a href="https://devtol.online" rel="noopener noreferrer">DevTol</a></strong> — a free suite of <strong>126+ developer and productivity tools</strong> that execute 100% inside your browser using Web Workers and the Web Crypto API.</p> <h3> What is inside DevTol? </h3> <ul> <li> <strong>Full Client-Side PDF Suite:</strong> Edit PDFs (with full Arabic RTL support), Compress PDFs locally (down to 100kb/200kb), Merge, and check Digital Signatures.</li> <li> <strong>Developer Utilities:</strong> JSON Diff &amp; Formatter, JWT Decoder, Regex Sandbox, SQL Prettifier, cURL to Code Converter (7 languages).</li> <li> <strong>AI Token Calculator:</strong> Calculate prompt tokens and API pricing across GPT-4o, Claude 3.5, Gemini, and DeepSeek.</li> <li> <strong>Zero Tracking:</strong> 100% free, no account needed, and no files ever leave your machine.</li> </ul> <p>Try it out here: <a href="https://devtol.online" rel="noopener noreferrer">https://devtol.online</a></p> <p>What tools would you like added next? Feedback is welcome!</p> ai webdev programming productivity