Online .docx editors and .docx in VS Code

In the browser

• Word for the web: free with a Microsoft account, the native format, co-editing; the file must be on OneDrive or SharePoint, and part of Word desktop is missing. See Word vs Paginel.
• Google Docs: edits a .docx without converting it and saves back to the original file, with its own layout; it flags the Word features it does not support. See Google Docs vs Paginel.
• ONLYOFFICE and Collabora Online: open source, to install on your servers. ONLYOFFICE Docs 9.4 removed the 20-connection limit of its community edition; Collabora Online 26.04 (July 2026) adds an optional AI assistant, off by default. See ONLYOFFICE, Collabora, LibreOffice or Paginel.
• Zoho Writer, CryptPad, Proton Docs: import and export .docx by converting it to their own format; CryptPad and Proton Docs are end-to-end encrypted. See Google Docs alternatives.

For developers: components to embed

These are not applications but building blocks to put a Word editor inside your own software. Paginel does not offer one.

• SuperDoc (Harbour Enterprises): writes directly into the .docx XML, real pages, sections, headers and footers, complex tables, track changes, comments, co-editing (Yjs), in the browser. Dual licence: AGPL 3.0, or commercial (Business: $6,000 a year).
• Syncfusion Document Editor: Word-like pagination; an internal format, with .docx going through a server-side service. Free Community licence under conditions (under $1M revenue, five developers at most), otherwise $1,199 per developer per year.
• CKEditor 5: Word import and export through an online service, without pages; Word import requires the Professional plan ($289 a month).
• DevExpress (about $2,300 per developer per year), TX Text Control ($4,198 per developer), Nutrient (on quote): proprietary editors, with a server-side engine for the first two.

In VS Code: .docx extensions

VS Code does not open .docx files on its own. Here are the extensions found on the Marketplace on 4 October 2026, from most to least installed. Most of them display the file; two really edit it.

• Office Viewer (cweijan, 1,543,930 installs, version 4.2.0 of 16 August 2026, MIT): an HTML preview of the .docx (docx-preview), without real pages; a visual Markdown editor.
• Docx/ODT Viewer (ShahilKumar, 406,233, 1.4.3 of 16 August 2026, MIT): read only; the file is converted to HTML (mammoth.js), without pages.
• Docx Renderer (AdamRaichu, 75,246, 1.1.3 of 23 January 2024): read only, approximate HTML rendering (docx-preview); no new version since 2024.
• Document Viewer (Syncfusion, 66,135, 4.0.5 of 13 July 2026, free and proprietary): viewing and light editing of .docx, .doc and .rtf; also opens PDF, Excel workbooks and Markdown.
• Docx Viewer (Leon-pw, 32,130, 1.0.1 of 25 April 2025): read only.
• Office Editor (shubhamprajapati1202, 26,522, 1.0.1 of 2 May 2026, MIT): edits .docx, but warns that complex formatting (headers, footers, macros) may be simplified on save.
• SuperDoc – Word Document Editor (7,476, 2.18.1 of 5 August 2026, AGPL 3.0): in-place editing, autosave, track changes, Word comments in the margin, reload when the file changes, MCP server for agents, all local.
• Office Viewer – DOCX, XLSX, PPTX (silurus, 1,907, 0.88.0 of 21 September 2026, MIT): read only, paged rendering by a Rust (WebAssembly) engine; the author warns that headers, footers and notes are still imperfect. Optional MCP server.
• ShowDocx (249, 1.2.1 of 1 September 2026, MIT): paged viewing according to its author, diff against the last git version, HTML, Markdown and PDF export, tools for agents.

For Markdown to PDF, the most installed extension is Markdown PDF (yzane, 4,188,165 installs): a web-page PDF, not a word-processor layout.

SuperDoc and Paginel: the closest pair

SuperDoc and Paginel start from the same idea: write into the .docx itself, without converting it, with real pages. Here are the differences, plainly.

• SuperDoc does better: track changes, editable tables, Word comments shown in the margin; an MCP server in the extension; open-source code (AGPL) that you can read and embed.
• Paginel does it differently: a PDF view identical to the exported PDF (PDF/A, tagged PDF); Markdown that becomes a laid-out document, with four views (Markdown, Web, Edit, PDF); a Markdown file synced with a Word file for agents; a platform hosted in France, with co-editing and guests by code, no server to set up.
• Price: the SuperDoc extension is free; embedding SuperDoc in a closed-source product requires the commercial licence ($6,000 a year for Business). Paginel is free during the beta; afterwards a free plan and €20 a year (VAT incl.) are planned. Paginel is not open source.

Paginel in VS Code

The Paginel Text extension opens a .docx (by default) or a Markdown file (on request) in the full Paginel interface, without leaving VS Code: the four views, the menus, PDF export. Saving is faithful: what Paginel does not understand or did not touch stays as it was in the file. It can keep a Markdown file next to the Word file, which your agent (Claude Code, for example) reads and edits; its changes are merged into the Word file paragraph by paragraph. See the extension page.

Preview version: not on the Marketplace yet (a .vsix file, on the Download page), tried on macOS only; signing in and online editing have not been tried on the real platform yet.