A3S Office
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      • A3S OfficeEdit Office files
      in your app

      Five editors, one host boundary: open, edit, and save documents, Markdown, spreadsheets, presentations, and PDFs in your app. You keep files, permissions, and storage; add collaboration when you need it.

      Five editors.
      One action from each.

      These captures come from the editors themselves. Each section shows one common action; open the Playground for the full interface.

      01 · Document
      1 / 05
      01

      Write, comment, and review in one view.

      The ribbon, page, comments, and revisions stay in one editor; collaborators see remote cursors on the page.

      View DocumentEditor
      02

      Edit the source. The preview follows.

      Move between source, split view, and preview without losing the content or caret position.

      View MarkdownEditor
      03

      Select a cell. See its formula and validation.

      The formula bar, table styles, and data validation follow the active cell; empty areas are drawn on demand.

      View SpreadsheetEditor
      04

      Select an object. Set its entrance animation.

      Slides, objects, animation timing, and presenter notes have separate views; text editing opens when needed.

      View PresentationEditor
      05

      Read the PDF while you organize pages and notes.

      Thumbnails, annotations, and page operations share the reading workspace; page reordering runs in a Worker.

      View PdfViewer

      Integration steps

      Render one editor, then connect your file data. Add collaboration when you need it.

      1. Install

        Install the package and render the first editor in an existing page.

        Docs Choose a framework

      2. Connect

        Connect file data, updates, import and export, and custom commands.

        Editor APIs Extension model

      3. Collaborate

        Let people and an agent edit the same file. Yjs and Yrs carry the changes.

        Live collaboration A3S Boot backend

      4. Automate

        Process Office files in batches with the CLI, MCP, A3S Code, or a Skill.

        CLI and Skill CLI reference

      Let people and an agent edit one file

      Person A, Person B, and A3S Agent open the same project brief. Text, comments, and review state appear on all three screens.

      • Comments, suggestions, and revisions write to one file
      • People and the A3S Agent can see each other’s cursors
      • A3S Boot handles room auth, message routing, and storage
      Read the integration flow Deploy the full backend

      Five editors

      Documents, Markdown, spreadsheets, presentations, and PDFs each have a matching editor.

      Start integrating

      Start with one editor and add the others when you need them.

      Browse docs Open Playground