The latest articles on DEV Community by Rauf Abdullayev (@rauf_abdullayev_95d9ffa6d). https://dev.to/rauf_abdullayev_95d9ffa6d 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%2F3840669%2F42518ee5-2908-4dad-8228-507e9b885d0c.jpg https://dev.to/rauf_abdullayev_95d9ffa6d en Rauf Abdullayev Mon, 23 Mar 2026 18:34:41 +0000 https://dev.to/rauf_abdullayev_95d9ffa6d/i-built-60-free-online-tools-heres-what-i-learned-3igp https://dev.to/rauf_abdullayev_95d9ffa6d/i-built-60-free-online-tools-heres-what-i-learned-3igp <h2> Why I Built VaxtimYoxdu </h2> <p>I was tired of jumping between dozens of websites for simple tasks — converting a PDF, resizing an image, formatting JSON. So I decided to build one platform that has everything.</p> <p><strong>VaxtimYoxdu.com</strong> (which means "I don't have time" in Azerbaijani) now offers 60+ free online tools, all under one roof.</p> <h2> The Tech Stack </h2> <ul> <li> <strong>Framework:</strong> Next.js 14 (App Router)</li> <li> <strong>Language:</strong> TypeScript</li> <li> <strong>Styling:</strong> Tailwind CSS</li> <li> <strong>Hosting:</strong> Vercel</li> <li> <strong>AI:</strong> Groq + Gemini + OpenAI (fallback chain)</li> <li> <strong>Database:</strong> Supabase</li> <li> <strong>Cache:</strong> Upstash Redis</li> <li> <strong>Email:</strong> Resend</li> <li> <strong>Monitoring:</strong> Sentry</li> </ul> <h2> What Tools Are Available? </h2> <h3> AI Tools (3) </h3> <p>AI Text Rewriter, Grammar Checker, Summarizer</p> <h3> PDF Tools (3) </h3> <p>PDF Merge, Split, Compress</p> <h3> Image Tools (4) </h3> <p>Image Compressor, Resizer, Cropper, Base64 Converter</p> <h3> Developer Tools (22) </h3> <p>JSON Formatter, Base64, JWT Decoder, Regex Tester, and 18 more</p> <h3> Generator Tools (14) </h3> <p>Password, QR Code, Lorem Ipsum, UUID, Color Picker, and 9 more</p> <h3> Text Tools (14) </h3> <p>Word Counter, Case Converter, Markdown Preview, and 11 more</p> <h2> Key Features </h2> <ul> <li> <strong>4 Languages:</strong> Azerbaijani, English, Turkish, Russian</li> <li> <strong>No Login Required:</strong> All tools work instantly</li> <li> <strong>PWA:</strong> Works offline, installable</li> <li> <strong>Dark Mode:</strong> System-aware theme</li> <li> <strong>1700+ Tests:</strong> Vitest + React Testing Library</li> </ul> <h2> Lessons Learned </h2> <ol> <li> <strong>Start simple, iterate fast</strong> — Started with 14 tools, now at 60+</li> <li> <strong>i18n is hard</strong> — 4 languages x 60 tools = lots of translation keys</li> <li> <strong>CSP can break your site</strong> — Removing unsafe-inline broke RSC hydration</li> <li> <strong>Rate limiting is essential</strong> — Without it, AI tools get abused within hours</li> <li> <strong>Test everything</strong> — 1700+ tests caught countless regressions</li> </ol> <h2> Try It Out </h2> <p>🔗 <strong><a href="https://vaxtimyoxdu.com" rel="noopener noreferrer">vaxtimyoxdu.com</a></strong></p> <p>I'd love to hear your feedback — what tools would you like to see added?</p> <p><em>Built with ❤️ in Azerbaijan</em></p> webdev nextjs opensource productivity