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OfficeIMO is a family of lightweight .NET libraries for working with Office and document-related formats without Office automation or COM.

• Word: create and edit .docx documents with a friendly object model
• Excel: read/write worksheets, tables, ranges, styles, and reports
• CSV: schema-aware CSV model with typed mapping and streaming helpers
• PowerPoint: generate .pptx slides programmatically
• Visio: basic .vsdx generation helpers
• Markdown: builder, typed reader/AST, HTML rendering, and host-oriented rendering helpers
• Reader: read-only extraction facade for ingestion scenarios

Each package is shipped independently under the MIT license unless noted otherwise.

• OfficeIMO.Word
• OfficeIMO.Excel
• OfficeIMO.CSV
• OfficeIMO.PowerPoint
• OfficeIMO.Visio
• OfficeIMO.Markdown
• OfficeIMO.Markdown.Html
• OfficeIMO.MarkdownRenderer
• OfficeIMO.MarkdownRenderer.Wpf
• OfficeIMO.MarkdownRenderer.IntelligenceX
• OfficeIMO.MarkdownRenderer.SamplePlugin
• Converters
  • OfficeIMO.Markdown.Html
  • OfficeIMO.Word.Html
  • OfficeIMO.Word.Markdown
  • OfficeIMO.Word.Pdf
• Reader
  • OfficeIMO.Reader
• Benchmarks
  • OfficeIMO.Markdown.Benchmarks
• Release prep
  • Docs/officeimo.markdown.release-checklist.md

• OfficeIMO.Word: main Word document object model
• OfficeIMO.Word.Html: HTML conversion helpers
• OfficeIMO.Word.Markdown: Markdown conversion helpers
• OfficeIMO.Word.Pdf: PDF export helpers

• OfficeIMO.Markdown: markdown builder, typed reader/AST, HTML renderer, front matter, TOC, callouts, and query helpers
• OfficeIMO.Markdown.Html: HTML-to-Markdown AST bridge targeting the OfficeIMO.Markdown document model
• OfficeIMO.MarkdownRenderer: WebView/browser-friendly rendering shell and incremental update helpers
• OfficeIMO.MarkdownRenderer.Wpf: reusable WPF/WebView2 MarkdownView host layered on top of the generic renderer
• OfficeIMO.MarkdownRenderer.IntelligenceX: first-party IntelligenceX plugin pack layered on top of the generic renderer
• OfficeIMO.MarkdownRenderer.SamplePlugin: sample third-party-style plugin pack showing shared visual host rendering plus HTML round-trip hints
• OfficeIMO.Markdown.Benchmarks: representative parse/render benchmark harness

• OfficeIMO.Excel: workbook, worksheet, table, style, and reporting helpers
• OfficeIMO.CSV: typed CSV read/write and schema workflows
• OfficeIMO.PowerPoint: programmatic slide generation
• OfficeIMO.Visio: basic diagram generation
• OfficeIMO.Reader: unified read-only extraction facade for ingestion workflows

• Word, PowerPoint, Visio: netstandard2.0, net472, net8.0, net10.0
• Excel, CSV: netstandard2.0, net472, net8.0, net10.0
• Markdown, MarkdownRenderer: netstandard2.0, net472, net8.0, net10.0
• MarkdownRenderer.Wpf: net472, net8.0-windows, net10.0-windows for the WPF/WebView2 surface, plus shared helper code on net8.0 and net10.0 for cross-platform validation/tests

• Reflection-heavy convenience APIs remain available for dynamic and PowerShell scenarios.
• For trimming-sensitive workloads, prefer typed overloads and explicit selectors.
• OfficeIMO.Markdown and OfficeIMO.MarkdownRenderer are designed to stay lightweight and predictable for embedded/document-host scenarios.

Arrows point from a package to what it depends on.

flowchart TB
  WCore["OfficeIMO.Word"]
  subgraph Extensions
    WHtml["OfficeIMO.Word.Html"]
    WMd["OfficeIMO.Word.Markdown"]
    WPdf["OfficeIMO.Word.Pdf"]
  end

  Angle["AngleSharp"]
  AngleCss["AngleSharp.Css"]
  Md["OfficeIMO.Markdown"]
  MdHtml["OfficeIMO.Markdown.Html"]
  Quest["QuestPDF"]
  Skia["SkiaSharp"]

  WHtml --> WCore
  WMd --> WCore
  WPdf --> WCore

  WMd --> WHtml
  WHtml --> Angle
  WHtml --> AngleCss
  MdHtml --> Md
  WMd --> Md
  WPdf --> Quest
  WPdf --> Skia

Converters ship in-repo and continue to evolve before broader release packaging decisions.

flowchart TB
  Md["OfficeIMO.Markdown"]
  MdHtml["OfficeIMO.Markdown.Html"]
  MdRenderer["OfficeIMO.MarkdownRenderer"]
  MdRendererWpf["OfficeIMO.MarkdownRenderer.Wpf"]
  MdRendererIx["OfficeIMO.MarkdownRenderer.IntelligenceX"]
  MdRendererSample["OfficeIMO.MarkdownRenderer.SamplePlugin"]
  MdBench["OfficeIMO.Markdown.Benchmarks"]
  WordMd["OfficeIMO.Word.Markdown"]
  Json["System.Text.Json"]
  WebView2["Microsoft.Web.WebView2"]

  MdHtml --> Md
  MdRenderer --> Md
  MdRenderer --> MdHtml
  MdRendererWpf --> MdRenderer
  MdRendererWpf --> WebView2
  MdRendererIx --> MdRenderer
  MdRendererSample --> MdRenderer
  MdRenderer --> Json
  MdBench --> Md
  WordMd --> Md

flowchart TD
  Xl["OfficeIMO.Excel"]
  OXml["DocumentFormat.OpenXml"]
  ImgSharp["SixLabors.ImageSharp"]
  Fonts["SixLabors.Fonts"]

  Xl --> OXml
  Xl --> ImgSharp
  Xl --> Fonts

flowchart TD
  Ppt["OfficeIMO.PowerPoint"]
  OXml["DocumentFormat.OpenXml"]

  Ppt --> OXml

flowchart TD
  Vsdx["OfficeIMO.Visio"]
  ImgSharp["SixLabors.ImageSharp"]
  Pkg["System.IO.Packaging"]

  Vsdx --> ImgSharp
  Vsdx --> Pkg

• Creating or editing Word documents: add OfficeIMO.Word
• Word to HTML: add OfficeIMO.Word + OfficeIMO.Word.Html
• Word to Markdown or Markdown to Word: add OfficeIMO.Word + OfficeIMO.Word.Markdown
• Word to PDF: add OfficeIMO.Word + OfficeIMO.Word.Pdf
• Building or parsing Markdown directly: add OfficeIMO.Markdown
• Hosting Markdown in WebView2 or a browser shell: add OfficeIMO.MarkdownRenderer
• Hosting Markdown in a WPF desktop app with WebView2: add OfficeIMO.MarkdownRenderer.Wpf
• Hosting IntelligenceX transcript/chat surfaces on top of the generic renderer: add OfficeIMO.MarkdownRenderer.IntelligenceX
• Benchmarking markdown parse/render behavior before release: use OfficeIMO.Markdown.Benchmarks
• Excel read/write and reporting: add OfficeIMO.Excel
• CSV schemas and typed CSV workflows: add OfficeIMO.CSV
• PowerPoint slides: add OfficeIMO.PowerPoint
• Visio diagrams: add OfficeIMO.Visio

For the current markdown package line:

• package docs live in OfficeIMO.Markdown/README.md, OfficeIMO.MarkdownRenderer/README.md, and OfficeIMO.MarkdownRenderer.Wpf/README.md
• benchmark harness lives in OfficeIMO.Markdown.Benchmarks
• release steps live in Docs/officeimo.markdown.release-checklist.md

• DocumentFormat.OpenXml: 3.3.x (conservative version ranges)
• SixLabors.ImageSharp / SixLabors.Fonts: Excel and image-centric packages
• AngleSharp / AngleSharp.Css: HTML conversion layers
• QuestPDF / SkiaSharp: PDF conversion layers
• System.Text.Json: markdown renderer host helpers

See each project .csproj for exact package ranges.

• OfficeIMO.Word, OfficeIMO.Excel, OfficeIMO.CSV, OfficeIMO.PowerPoint, OfficeIMO.Markdown, OfficeIMO.MarkdownRenderer, OfficeIMO.MarkdownRenderer.Wpf, OfficeIMO.Markdown.Html, OfficeIMO.Word.Html, OfficeIMO.Word.Markdown, OfficeIMO.Word.Pdf: MIT
• OfficeIMO.Visio: license still being finalized

Third-party dependency licenses are governed by their upstream projects.

If you find this project helpful, please consider supporting its development. Your sponsorship will help the maintainers dedicate more time to maintenance and new feature development for everyone.

It takes a lot of time and effort to create and maintain this project. By becoming a sponsor, you can help ensure that it stays free and accessible to everyone who needs it.

To become a sponsor, you can choose from the following options:

• Become a sponsor via GitHub Sponsors ❤️
• Become a sponsor via PayPal ❤️

Your sponsorship is completely optional and not required for using this project. We want this project to remain open-source and available for anyone to use for free, regardless of whether they choose to sponsor it or not.

If you work for a company that uses our .NET libraries or PowerShell modules, please consider sponsoring. Thank you for considering support!

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