The latest articles on DEV Community by FnF (@fnf_08927f0ffbd60a). https://dev.to/fnf_08927f0ffbd60a 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%2F3946901%2F4363885f-ba63-43b9-bb46-25a65f68c1d5.png https://dev.to/fnf_08927f0ffbd60a en FnF Fri, 22 May 2026 23:35:23 +0000 https://dev.to/fnf_08927f0ffbd60a/95-browser-based-dev-tools-that-never-touch-a-server-3li6 https://dev.to/fnf_08927f0ffbd60a/95-browser-based-dev-tools-that-never-touch-a-server-3li6 <p>Every developer has a folder of bookmarks for one-off tools — <br> a JWT decoder here, a Base64 encoder there, a cron expression <br> tester somewhere else. Half of them send your data to a server <br> you know nothing about.</p> <p>I built <a href="https://wizbit.to" rel="noopener noreferrer">Wizbit.to</a> to fix that.</p> <h2> What it is </h2> <p>95+ free developer utilities, all running 100% in your browser. <br> No server ever sees what you paste. No account. No ads. No limits.</p> <h2> What's inside </h2> <p><strong>Data &amp; encoding</strong></p> <ul> <li>JSON formatter, beautifier, minifier &amp; validator</li> <li>Base64 encoder/decoder</li> <li>CSV → JSON, CSV → Markdown, YAML ↔ JSON converters</li> <li>ENV file parser and ENV → JSON/YAML converter</li> </ul> <p><strong>Security &amp; crypto</strong></p> <ul> <li>JWT decoder with expiry checker and claims differ</li> <li>Hash generator (SHA-256, SHA-512)</li> <li>RSA key pair generator &amp; X.509 certificate inspector</li> <li>BIP39 seed phrase generator</li> <li>Password generator &amp; strength checker</li> </ul> <p><strong>Developer utilities</strong></p> <ul> <li>Regex tester with live match highlighting</li> <li>Cron expression builder and syntax decoder</li> <li>SQL formatter</li> <li>Webhook visualizer and Stripe webhook simulator</li> <li>UUID/GUID generator (v4, v5, v7, bulk)</li> <li>HTTP status explorer</li> <li>CIDR subnet calculator</li> <li>Semver comparator</li> </ul> <p><strong>Frontend &amp; CSS</strong></p> <ul> <li>SVG → JSX converter and SVG cleaner</li> <li>CSS shadow, clip-path, and glassmorphism generators</li> <li>Color converter (HEX, RGB, HSL)</li> <li>Bezier curve and spring physics playground</li> </ul> <p><strong>AI &amp; LLM tools</strong></p> <ul> <li>Prompt tokenizer and token calculator</li> <li>Context trimmer and prompt compressor</li> <li>AI response cleaner and text humanizer</li> </ul> <p><strong>VFX &amp; camera (yes, really)</strong></p> <ul> <li>Depth of field visualizer</li> <li>LUT .cube file 3D visualizer</li> <li>ACES color space matrix calculator</li> <li>Timecode and frame arithmetic calculator</li> <li>Focal length / FOV / crop factor matcher</li> </ul> <h2> Why it's different </h2> <p>Most online dev tools are thin wrappers around a server call. <br> That's fine for public data — but when you're pasting a JWT, <br> an RSA private key, an ENV file, or a seed phrase, you're <br> trusting a server you've never audited.</p> <p>Wizbit processes everything locally. The code runs in your tab. <br> Close the tab and it's gone.</p> webdev productivity tooling