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Create and edit Word DOCX plus supported DOC, templates, and review Excel XLSX plus supported XLS/XLSB, formulas, and charts PowerPoint PPTX plus supported PPT/PPS/POT and data-driven decks PDF Author, inspect, transform, and sign PDF OneNote Native offline OneNote files and notebooks

Formats and conversion Email EML, MSG, stores, calendars, and contacts OpenDocument ODT, ODS, ODP, and Office adapters HTML HTML, MHTML, resource policy, and rendering RTF Rich Text Format editing, preservation, and conversion EPUB EPUB metadata, chapters, resources, and extraction Markdown Typed AST, transforms, and rendering Visio VSDX pages, shapes, and connectors

Workflows Reader Extract and normalize content across formats Google Workspace Docs, Sheets, Slides, Drive, and sync PSWriteOffice Document automation from PowerShell All packages Find every library and focused adapter

By task Check format support See DOC, XLS, PPT, modern formats, fidelity, and limits Modernize legacy Office files Move DOC, XLS, and PPT archives into governed modern workflows Publish documents Create Office, PDF, HTML, Markdown, and open-format output Extract content Normalize documents for search, review, and AI workflows Migrate Outlook data Read PST, OST, OLM, mbox, Maildir, and export verified PST files Work with OneNote offline Read native OneNote files and export pages without Graph Automate with PowerShell Build repeatable document jobs from scripts and pipelines Migrate Google Workspace Translate Docs, Sheets, Slides, Drive, and Office content

By deployment Cross-platform .NET Choose packages for services, apps, and AOT Browser conversion Run supported routes locally with WebAssembly Server workflows Keep authentication, storage, and retention in your stack Compare libraries Choose OfficeIMO, Open XML SDK, ClosedXML, EPPlus, QuestPDF, or a commercial suite

Document APIs All API references OfficeIMO.Word API OfficeIMO.Excel API OfficeIMO.PowerPoint API OfficeIMO.Pdf API OfficeIMO.OneNote API

Formats and content OfficeIMO.Markdown API OfficeIMO.CSV API OfficeIMO.Visio API OfficeIMO.Html API HTML/RTF API MHTML API MHTML/PDF API OfficeIMO.Email API Email image API OpenDocument API

Workflows and cloud OfficeIMO.Reader API Google Workspace API Google Drive API Google Auth API Google Sync API PSWriteOffice Cmdlets

Learn and evaluate Blog Patterns, releases, and practical walkthroughs Showcase See generated document workflows Benchmarks Measured package and performance evidence Support Open-source help and commercial support

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OfficeIMO

Open source .NET libraries for document builders, extraction workflows, and PowerShell automation.

Products

OfficeIMO.Word
OfficeIMO.Excel
OfficeIMO.PowerPoint
OfficeIMO.Pdf
OfficeIMO.Email
OfficeIMO.OneNote
OfficeIMO.OpenDocument
OfficeIMO.Rtf
OfficeIMO.Epub
OfficeIMO.Markdown
OfficeIMO.CSV
OfficeIMO.Visio
OfficeIMO.Reader
PSWriteOffice

Documentation

Getting Started
Workflow Finder
Database Reporting
Word Docs
Excel Docs
PowerPoint Docs
PDF Docs
Email Docs
OneNote Docs
RTF Docs
EPUB Docs
Markdown Docs
CSV Docs
Visio Docs
Reader Docs
PSWriteOffice Docs

Resources

FAQ
License and AI use
Third-Party Dependencies
Downloads
Releases
Benchmarks
Compatibility
Conversion guides
Comparison
Browser converter
Support
Showcase
Blog

Community

GitHub (OfficeIMO)
GitHub (PSWriteOffice)
NuGet
PowerShell Gallery
Discord
Report Issue

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