Our Mission
DevTools Hub provides a free, privacy-first collection of 260+ 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 web 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.
Maintainer credentials: BAOMING (Evan-MJ) is an independent full-stack developer with 10+ years of professional experience in web technologies (HTML, CSS, JavaScript, Python, Rust). The maintainer's source code is publicly auditable on GitHub, and every tool ships with transparent client-side processing — no hidden servers, no obfuscation, no data exfiltration.
Last reviewed: 2026-08-24 by BAOMING (Evan-MJ). Verified: 260 tools operational, all processing client-side, zero tracking cookies, zero analytics that follow users across the web.
What We Offer
- 260+ 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 Free Tools
DevTools Hub offers a free online JSON formatter and validator, a free online HTML formatter, a free online image compressor, a free online video compressor, a free online calculator, a free online password generator, a free online QR code generator, a free online PDF merger, a free online PDF watermark, a free online PDF page number adder, a free online AI translator, a free online currency converter, a free online DNS lookup, a free online regex tester, a free online world clock, a free online stopwatch, a free AI subtitle generator, a free online audio editor, and 240+ more free tools. Every tool is free to use online with no signup, no watermark, and no tracking.
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).