The latest articles on DEV Community by romail ahmad (@romail_ahmad_a2bea62f86ad). https://dev.to/romail_ahmad_a2bea62f86ad 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%2F3959034%2F84d8e138-0bfa-4a14-a774-3c0a118dcc0e.jpg https://dev.to/romail_ahmad_a2bea62f86ad en romail ahmad Fri, 29 May 2026 19:47:37 +0000 https://dev.to/romail_ahmad_a2bea62f86ad/55-free-developer-tools-that-run-100-in-your-browser-1hn7 https://dev.to/romail_ahmad_a2bea62f86ad/55-free-developer-tools-that-run-100-in-your-browser-1hn7 <p>Every developer pastes sensitive data into online tools all day — JWTs, API keys, production JSON, <code>.env</code> values, customer data. And most "free" dev-tool sites do one of three things: upload that data to their servers, bury the tool in ads, or paywall the useful features.</p> <p>That bothered me enough to build an alternative.</p> <h2> Meet ToolsForDevs Pro </h2> <p><strong><a href="https://www.toolsfordevs.pro" rel="noopener noreferrer">ToolsForDevs Pro</a></strong> is a collection of <strong>55 developer tools that run 100% in your browser</strong>. Your data never touches a server — you can open your browser's DevTools → Network tab while using any tool and watch: zero requests carrying your input.</p> <ul> <li>✅ No signup, no ads, no upload limits</li> <li>✅ Works offline-style (everything is client-side)</li> <li>✅ Available in 7 languages</li> <li>✅ Free, forever</li> </ul> <p>👉 <strong><a href="https://www.toolsfordevs.pro" rel="noopener noreferrer">https://www.toolsfordevs.pro</a></strong></p> <h2> What's inside (7 categories) </h2> <ul> <li> <strong>JSON</strong> — formatter, validator, minifier, compare, JSON ↔ XML/YAML/CSV, JSON → TypeScript/POJO</li> <li> <strong>XML</strong> — validator, formatter, minifier, compare, XML → JSON</li> <li> <strong>Encoding</strong> — Base64, URL, image → Base64, case converter, number base, color converter</li> <li> <strong>Crypto</strong> — UUID, hash suite, SHA-256, <strong>AES</strong> (with proper GCM authentication), RSA, JWT debugger/generator, <strong>TOTP</strong> generator, password generator</li> <li> <strong>PDF</strong> — <strong>merge, split, images → PDF, PDF → images</strong> (no upload, unlike the usual suspects)</li> <li> <strong>Web &amp; SEO</strong> — meta tag generator (with live Google + social preview), robots.txt, <code>.gitignore</code>, <code>.htaccess</code> </li> <li> <strong>Utilities</strong> — text diff, regex tester, SQL formatter, Markdown preview, cron, QR code, curl converter, image compressor, ATS resume checker, and more</li> </ul> <h2> Why client-side matters </h2> <p>When a tool runs in your browser, your secrets stay on your machine. There's no "did this site just log my JWT?" anxiety. For anything touching credentials or production data, this isn't a nice-to-have — it's the only responsible default. It's also faster (no round-trip) and works even on flaky connections.</p> <h2> A few I'm proud of </h2> <ul> <li> <strong>AES encryption</strong> that actually authenticates GCM ciphertext (a surprising number of online tools get this wrong).</li> <li>A <strong>PDF suite</strong> that merges/splits and converts images ↔ PDF entirely locally — no uploading your documents to someone's server.</li> <li>A <strong>meta tag generator</strong> with a live Google search + social-card preview as you type.</li> </ul> <h2> Try it &amp; tell me what's missing </h2> <p>It's live here: <strong><a href="https://www.toolsfordevs.pro" rel="noopener noreferrer">https://www.toolsfordevs.pro</a></strong></p> <p>I'm actively adding tools. <strong>What would you want next?</strong> An image converter? Background remover? A mock-data generator? Drop a comment — I'm building based on what people actually need.</p> privacy resources showdev tooling