Programming language: Go
License: GNU General Public License v3.0 or later
Tags: Microsoft Office    
Latest version: v1.7.0

unioffice alternatives and similar packages

Based on the "Microsoft Office" category.
Alternatively, view unioffice alternatives based on common mentions on social networks and blogs.

  • go-excel

    A simple and light excel file reader to read a standard excel as a table faster | 一个轻量级的Excel数据读取库,用一种更`关系数据库`的方式解析Excel。
  • exl

    Excel binding to struct written in Go.(Only supports Go1.18+)

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unioffice is a library for creation of Office Open XML documents (.docx, .xlsx and .pptx). Its goal is to be the most compatible and highest performance Go library for creation and editing of docx/xlsx/pptx files.

Build Status GitHub (pre-)release License: UniDoc EULA ApiDocs

[https://github.com/unidoc/unioffice/](./.github/preview.png "unioffice")


  • Documents (docx) [Word]
    • Read/Write/Edit
    • Formatting
    • Images
    • Tables
    • Word to PDF (docx to pdf)
  • Spreadsheets (xlsx) [Excel]
    • Read/Write/Edit
    • Cell formatting including conditional formatting
    • Cell validation (drop down combobox, rules, etc.)
    • Retrieve cell values as formatted by Excel (e.g. retrieve a date or number as displayed in Excel)
    • Formula Evaluation (100+ functions supported currently, more will be added as required)
    • Embedded Images
    • All chart types
  • PowerPoint (pptx) [PowerPoint]
    • Creation from templates
    • Textboxes/shapes


There has been a great deal of interest in performance numbers for spreadsheet creation/reading lately, so here are unioffice numbers for this benchmark which creates a sheet with 30k rows, each with 100 columns.

creating 30000 rows * 100 cells took 3.92506863s
saving took 89ns
reading took 9.522383048s

Creation is fairly fast, saving is very quick due to no reflection usage, and reading is a bit slower. The downside is that the binary is large (33MB) as it contains generated structs, serialization and deserialization code for all of DOCX/XLSX/PPTX.


go get github.com/unidoc/unioffice/

License key

This software package (unioffice) is a commercial product and requires a license code to operate.

To Get a Metered License API Key in the Free Tier, sign up on https://cloud.unidoc.io

Document Examples

Spreadsheet Examples

Presentation Examples

Raw Types

The OOXML specification is large and creating a friendly API to cover the entire specification is a very time consuming endeavor. This library attempts to provide an easy to use API for common use cases in creating OOXML documents while allowing users to fall back to raw document manipulation should the library's API not cover a specific use case.

The raw XML based types reside in the schema/ directory. These types are accessible from the wrapper types via a X() method that returns the raw type.

For example, the library currently doesn't have an API for setting a document background color. However it's easy to do manually via editing the CT_Background element of the document.

doc := document.New()
doc.X().Background = wordprocessingml.NewCT_Background()
doc.X().Background.ColorAttr = &wordprocessingml.ST_HexColor{}
doc.X().Background.ColorAttr.ST_HexColorRGB = color.RGB(50, 50, 50).AsRGBString()

Contribution guidelines

If you are interested in contributing, please contact us.

Support and consulting

Please email us at [email protected] for any queries.

If you have any specific tasks that need to be done, we offer consulting in certain cases. Please contact us with a brief summary of what you need and we will get back to you with a quote, if appropriate.

License agreement

The use of this software package is governed by the end-user license agreement (EULA) available at: https://unidoc.io/eula/

*Note that all licence references and agreements mentioned in the unioffice README section above are relevant to that project's source code only.