Generate a report or invoice
Build Word and PDF output from application data or an approved template.
Check placeholder completeness and the output's layout before delivery.
One document engine. Every way you work.
Create, convert and read Word, Excel, PowerPoint and PDF files from a desktop app, your browser, the terminal, .NET or PowerShell. No Office install, no COM.
- MIT licensed
- Windows, Linux and macOS
- NativeAOT tested
❯ officeimo convert report.docx report.pdf ❯ officeimo convert report.pdf report.md ❯ officeimo mcp serve --stdio
New-OfficeWord -Path '.\report.docx' { Add-OfficeWordSection { Add-OfficeWordParagraph -Text 'Q3 report' Add-OfficeWordTable -InputObject $Sales } }
Start with the document job
Convert Office files to PDF
Turn a Word document, workbook, or presentation into a downloadable PDF.
Fonts and unsupported layout features can change the result; read the conversion diagnostics.
Merge, split, or reorder PDFs
Select pages and produce a separate document while retaining the source.
Protected, signed, or unsupported inputs can restrict rewriting. Each tool reports its limits.
Extract content for search and AI
Read text, tables, and source locations across document formats.
Scans need an optional OCR provider. Extracted text is not proof of original reading order.
Automate spreadsheet reporting
Export objects and database results to Excel or CSV in repeatable scripts.
Use the module's documented runtime and provider requirements for your chosen data source.
Review and edit a PDF visually
Keep the document in view while working with comments, forms, pages, and supported content.
Windows and Linux packages are available for x64 and Arm64. Arm64 installation and runtime testing is pending. macOS requires a source build. Check the Studio guide for optional OCR providers and printing requirements.
Made with OfficeIMO
See it in action.
Try a document tool, explore real output, or start from a working example.
Try the browser converter Work with your files directly in the browser. Explore generated documents Download the output and inspect its source. Start with code Use a C# or PowerShell example in your project.
Project charter
Create an editable Word project charter in C# with scope, milestone owners, acceptance evidence, and a PDF copy for review and handover.
Budget scenario comparison
Compare budget scenarios in Excel with C# formulas, editable assumptions, and calculated contribution. Download the workbook, preview, and source.
An editable project roadmap deck
Create a PowerPoint roadmap in C# with editable phase cards and a decision-checkpoint table. Preview the slides and download the PPTX and PDF.
A two-page workshop pack
Build a two-page PDF workshop pack in C# with an agenda, exercise sheet, running header, and page numbers. Preview both pages and download the PDF.
Open source · MIT
Built in the open. Better with you.
OfficeIMO and PSWriteOffice are developed on GitHub by Evotec and contributors. Every bug report, docs fix and question makes them better.
Join the DiscordAsk questions, share what you built and talk directly with the maintainers. Open Discord Report an issueFound a file that converts badly? Attach it to an issue so it can become a test. Open an issue Send a pull requestCode, tests and examples are welcome. The website and docs live in the same repository under Website. Contribute Share an exampleBuilt a report or a script others could reuse? Post it on Discord so it can be considered for the showcase. Share it Sponsor the workSponsorship funds maintenance, new formats and faster releases. Become a sponsor
Frequently Asked Questions
Does OfficeIMO require Microsoft Office to be installed?
No. OfficeIMO uses managed document engines and focused package dependencies; it does not require Microsoft Office, COM automation, or Office interop assemblies at runtime. Optional desktop Office checks are validation oracles, not runtime dependencies.
Does OfficeIMO support DOC, XLS, XLSB, and PPT as well as DOCX, XLSX, and PPTX?
OfficeIMO classifies and reads modern and legacy Word, Excel, and PowerPoint families, writes documented native subsets, and reports conversion coverage by operation and fidelity. Use the compatibility dashboard for tracked behaviors, fallbacks, and deliberate blocks.
What .NET versions are supported?
OfficeIMO targets .NET 8.0, .NET 10.0, .NET Standard 2.0, and .NET Framework 4.7.2.
Is OfficeIMO free for commercial use?
Yes. The OfficeIMO packages themselves are published under the MIT License. However, some optional package families build on third-party dependencies with their own upstream terms, so commercial teams should also review our Third-Party Dependencies page during OSS approval.
How does OfficeIMO compare to Aspose or GemBox?
OfficeIMO is an MIT-licensed, source-available document platform for .NET and PowerShell with modern and legacy Office support, focused packages, explicit conversion-fidelity policies, and no runtime royalty. Commercial suites can provide broader portfolio coverage, more mature rendering for some workloads, formal support, and procurement SLAs. Compare the exact formats, operations, fidelity, deployment model, and support obligations your application needs on our evaluation page.