About Doc80
Doc80 is a free, bilingual toolbox for everyday tasks involving images, QR codes, PDFs, text, data and development.
Ready when you are
There are currently 66 tools. Browse categories or search by name, then choose a file or enter content on a tool page. No account is required. Pages and tools are available in Chinese and English.
How your content is handled
Tool files and inputs are processed on your device in the browser by default. Favorite and recently used tool IDs are stored in your browser so you can find them later. Camera scanning starts only after you choose to start it and grant permission. Linked images in Markdown previews are not loaded by default; enabling them sends requests to their image hosts.
Open-source software
Image tools use Fabric.js, react-easy-crop and Pica. QR styling uses qr-code-styling; text comparison uses jsdiff. Code editing uses CodeMirror; Markdown uses marked and DOMPurify.
A practical note
Your device memory and performance may limit work with large files. Keep the original file and check generated results before using them.