About Us
QiLing Tools (祈灵工具箱) is a free online toolbox. We turn the most common everyday file tasks into ready-to-use web tools, and all the processing happens inside your browser.
What we do
We bring PDF processing, image compression and conversion, audio and video trimming and transcoding, mind maps and JSON utilities together in one place. Open the page and use it: no installs, no accounts, no limits.
Our principles
Files never leave your device
Built on WebAssembly and native browser APIs, all PDF, image, audio and video processing runs on your own device. Contracts, ID documents and recordings never pass through our servers and are gone when you close the tab.
Free, with no barriers
No subscriptions, no watermarks, no daily quotas. An account is only used to save personal content such as mind maps; the file tools never require signing in.
Simple and reliable
Each tool does one job with a straightforward interface, and results download directly. We keep adding tools and would love to hear what you need.
Technology
The site is built with React and prerendered to static pages. PDFs are handled by pdf-lib and PDF.js, images by the browser Canvas API, audio and video by FFmpeg.wasm, and the mind map is our own SVG editor with XMind import and export.
Privacy
The file tools never upload files or record their contents. The account system stores only your email and the content you choose to save. We do not sell data or run tracking ads.
Languages
The site is available in Chinese and English. It picks a language from your region, you can switch at any time from the navigation bar, and your choice is remembered.