Work with Office/OOXML documents — Excel .xlsx spreadsheets and Word .docx files — by running this repo's CLIs on the WebAssembly backend, a memory-safe sandbox with no native document libraries. Use it to generate a spreadsheet or Word document, turn CSV/table data into .xlsx, author a .docx (headings, styled text, links, images, lists, tables) from a JSON op script, read a document's structure/text/elements as JSON, convert a .docx to HTML or Markdown, extract images, or check that a file is structurally valid. Reach for this instead of openpyxl / ExcelJS / python-docx / pandoc / LibreOffice.
2026-07-12