The short version
Scissor Office's servers never receive your documents. When you open the app, your browser downloads the website, including the document engine. When you write, open or save a file, that engine runs in the same browser tab. Your documents are kept in your browser's own storage on your device, and files you export are saved straight to your device.
The engine
The part that reads and writes files is written in Rust and compiled to WebAssembly, so it runs in the browser at close to native speed. It turns DOCX, ODT, Markdown and text files into one simple document model and writes that model back out as DOCX, ODT, HTML, Markdown or text. The editor you type in is the browser's own text editing, kept tidy by the engine's rules.
Opening PDF and LaTeX
PDF files are read with PDF.js inside the tab, and the engine rebuilds their text, headings, lists, pictures and page sizes into a document. LaTeX files (a .tex file or a .zip project) are converted by the same engine Scissor LaTeX uses, with the project's included files and pictures.
Where documents are kept
Drafts are saved as you type into your browser's IndexedDB storage for this site, on this device. They are not synced anywhere. Clearing this site's data in your browser deletes them, and another browser or device does not see them. Use Export to keep a copy as a file.
Google Drive, if you want it
Open from Google Drive and Save to Google Drive talk to your own Drive straight from your browser. Google's sign-in and file picker load only when you first press one of these buttons, and the permission asked for covers only the files you open or save with Scissor Office. Your files never pass through our servers.
The AI panel
The AI panel is optional and runs on your device. When you download a model, your browser gets it from this site once and stores it in a space on your device that the Scissor tools share (ai.scissor.studio), so the other Scissor tools don't download it again. Your documents and what you ask the AI never leave your device. Deleting a model deletes it from every Scissor tool. In Safari, and on iPhone and iPad, each tool keeps its own copy.
Check it yourself
Open your browser's developer tools, go to the Network tab and use the app: you will see the site's own files load, and nothing sent when you type, open or save a document on your device. The page's Content Security Policy only allows connections to this site, and to Google's sign-in and Drive services for the Drive buttons, which also blocks any accidental upload elsewhere. The only messages the site sends are anonymous usage counts and the forms you choose to send, described in the privacy policy.
Formats and limits
Documents keeps text, titles and headings, bulleted and numbered lists (nested), quotes, links, bold, italic, underline, strikethrough and alignment. Pictures and the paper size are kept too. Tables, footnotes, comments and tracked changes in files you open are not kept yet. PDF is made by your browser's print function. File formats are implemented from their published standards: ODF (ISO/IEC 26300) and Office Open XML (ISO/IEC 29500).