Frequently Asked Questions

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No. OfficeIMO works entirely with Open XML standards and does not require Microsoft Office, COM automation, or any Office interop assemblies. It runs on any platform where .NET is available.

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OfficeIMO targets .NET 8.0, .NET 10.0, .NET Standard 2.0, and .NET Framework 4.7.2. This means it works with .NET Core, .NET 5+, and legacy .NET Framework projects.

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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.

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OfficeIMO is open source and free (MIT license), while Aspose and GemBox are commercial products costing $890–$999+ per developer per year. OfficeIMO also offers unique features like a PowerShell module, Markdown library, typed CSV workflows, and NativeAOT support. See our detailed comparison.

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Absolutely. Since OfficeIMO has no COM dependencies and runs on .NET, it works perfectly in Linux containers, GitHub Actions, Azure DevOps, and any CI/CD environment. No special fonts or display servers needed.

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PSWriteOffice is a PowerShell module that wraps the OfficeIMO .NET libraries. It provides 150+ cmdlets and DSL aliases for creating Office documents from PowerShell scripts without writing C#. Install it with Install-Module PSWriteOffice.

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Yes. All core libraries (Word, Excel, PowerPoint) support both creating new documents and loading/editing existing ones. The OfficeIMO.Reader package provides a unified extraction API across all formats for AI ingestion and search indexing.

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Yes. The CSV and Markdown packages are fully AOT/trimming-safe. The Word, Excel, and PowerPoint packages are AOT-aware and work in trimmed scenarios with appropriate configuration.

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The core Office document packages are built on DocumentFormat.OpenXml, while image- and converter-oriented packages also use components such as SixLabors.ImageSharp, AngleSharp, and QuestPDF depending on the feature area. The Markdown and CSV core packages stay dependency-light. See the Third-Party Dependencies page for the package-by-package breakdown and upstream license notes.

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Yes. The OfficeIMO.Word.Pdf converter package supports Word-to-PDF conversion without Office. There are also converters for Word-to-HTML and Word-to-Markdown.

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OfficeIMO.Excel supports parallel execution for bulk operations like AutoFit and bulk writes. Each document instance is independent and can be used on separate threads. Concurrent access to a single document instance is not supported.

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