openxml-office (v1.x Discontinued)

.NET only · Legacy release

openxml-office v1.x

The first release line of openxml-office built directly on the OpenXML SDK for .NET. This version is no longer maintained — these pages are kept for historical reference only.

v1.x · DiscontinuedNo new features or fixes

Go to current stable (v2.x)Preview v4.x alphaBrowse v1.x docsView on GitHub

What was in v1.x

.NET-first library

Built directly on the OpenXML SDK 3.0 with a focus on PowerPoint and Excel document creation from C#.

Spreadsheets & Presentations

APIs for .xlsx workbooks and .pptx decks, including the first generation of chart and shape helpers.

Office 2013+ compatible

Output targets Microsoft Office 2013 and newer, matching the compatibility line used across the family.

Move forward

Current stable (v2.x) →

The recommended release for new projects today.

Alpha (v4.x) →

The active Rust rewrite with cross-language bindings.

Browse v1.x docs →

The original installation and usage guide for v1.x.