Our Mission
DevTools Hub provides a free, privacy-first collection of 138+ online developer tools. Every tool runs entirely in your browser — your data, code, and files never leave your device. We exist to make common developer tasks faster, easier, and more accessible to everyone.
Who We Are
DevTools Hub is built and maintained by BAOMING (Evan-MJ), an independent developer focused on creating fast, reliable, and ethical developer tools. The project is hosted on Cloudflare Pages and powered entirely by static HTML, CSS, and client-side JavaScript.
What We Offer
- 138+ free tools across 11 categories: Formatters, Calculators, Generators, Converters, Media Tools, Network Tools, Code Testing, PDF Tools, Daily Life, Finance, and AI Language.
- Zero signup — no accounts, no email verification, no usage limits.
- Browser-based — all processing happens locally; your input never reaches a server.
- Mobile-friendly responsive design that works on any device.
- Open standards — we publish llms.txt and sitemap.xml for transparent AI and search engine discovery.
- Popular tools include JSON Formatter & Validator, HTML Formatter, Image Compressor, Password Generator, QR Code Generator, PDF Merger, AI Translator, Online Calculator, DNS Lookup, Unit Converter, AI Chat, and Grammar Checker.
Technology
- Frontend: Vanilla HTML, CSS, and JavaScript — no frameworks, no build step. All tools follow MDN Web Standards for cross-browser compatibility.
- Hosting: Cloudflare Pages (global edge network with 330+ data centers).
- APIs: Free tiers of Groq, NVIDIA NIM, Google Gemini, SiliconFlow, and others for AI features.
- Storage: Cloudflare KV for optional user feedback (no personal data).
Privacy
We don't track users, set advertising cookies, or collect personal data. See our Privacy Policy for full details.
Contact & Feedback
Found a bug or want to request a tool? Use the Report Problem link on any page, or visit the Feedback page.
License
All tools on DevTools Hub are provided free of charge for personal and commercial use. The site code is original work by BAOMING (Evan-MJ).