The latest articles on DEV Community by velnoxlabstools (@velnoxlabstools). https://dev.to/velnoxlabstools 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%2F4145527%2F5ced2447-aa1f-4a63-b37b-16f5ad1195b1.png https://dev.to/velnoxlabstools en velnoxlabstools Sun, 27 Sep 2026 13:04:33 +0000 https://dev.to/velnoxlabstools/i-built-51-free-browser-based-developer-tools-heres-why-and-how-5049 https://dev.to/velnoxlabstools/i-built-51-free-browser-based-developer-tools-heres-why-and-how-5049 <p>I was tired of slow, ad-filled tool websites that upload my data to their servers just to format a JSON file.</p> <p>So I built VelnoxLabs — 51 free browser-based tools that run 100% in your browser. No sign-up. No server upload. No tracking.</p> <p>Here's what's inside:</p> <h2> Developer Tools </h2> <ul> <li>JSON Formatter &amp; Validator</li> <li>cURL to Python Requests Converter</li> <li>Cron Expression Generator</li> <li>UUID v4 Generator</li> <li>Base64 Encoder &amp; Decoder</li> <li>JWT Decoder</li> <li>And many more...</li> </ul> <h2> Everyday Tools </h2> <ul> <li>Image Resizer</li> <li>Word Counter</li> <li>Age Calculator</li> <li>BMI Calculator</li> <li>Tip Calculator</li> <li>Invoice Generator</li> </ul> <h2> Tech Stack </h2> <ul> <li>Next.js (App Router)</li> <li>TypeScript</li> <li>Tailwind CSS</li> <li>Deployed on Vercel</li> </ul> <p>Everything runs client-side. Your data never leaves your browser.</p> <p>Try it here: <a href="https://velnoxlabs.com" rel="noopener noreferrer">https://velnoxlabs.com</a></p> <p>Feedback welcome!</p> webdev javascript showdev nextjs