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Build powerful applications for Office

Use the Office JavaScript API to extend functionality for Word, Excel, PowerPoint, and Outlook.

Build applications for Excel

Integrate with Outlook

Create add-ins for PowerPoint

Extend Word across multiple platforms

What's new in Office development

Microsoft Excel v1.13 API updates – June 2021

In this 11-minute developer-focused demo, Raymond Lu’s presentation focuses on 2 JS APIs in Excel v1.13 to be released in mid-July. 1) ins...
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Microsoft Graph Change Notifications Sample for ASP.NET Core

This sample ASP.NET Core web application shows how to subscribe to change notifications using webhooks. This sample also supports receiving ...
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Automate your Excel tasks with Office Scripts

Office Scripts allows users with all levels of programming experience to automate their repetitive workflows. Use the Action Recorder to gen...
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Microsoft Graph Webhooks Sample for Node.js

This sample NodeJS web application shows how to subscribe to change notifications using webhooks. This sample also supports receiving change...
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Top 10 hidden gems: Microsoft Lists

Did you know Microsoft Lists could do this or that? In this demo video, we hope you’ll find a few useful, hidden gems to jumpstart your info...
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Use keyboard shortcuts for Office add-in actions

This sample shows how to add keyboard shortcuts to your Office Add-in.
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Insert an external Excel file and populate it with JSON data

This sample shows how to insert a template from an external Excel file and populate it with JSON data.
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Create custom contextual tabs on the ribbon

Learn how to create a contextual tab that displays on the ribbon in response to the context of the Office UI.
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Explore learning paths and become a certified Microsoft 365 developer.

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Submit your Microsoft 365 App to Microsoft AppSource to make it available to consumers and businesses.

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Join the Microsoft 365 Developer Program

Get a free sandbox, tools, and other resources you need to build solutions for the Microsoft 365 platform, including:

A free Microsoft 365 E5 developer subscription
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Featured tools

Script Lab

Script lab is an Office JavaScript API tool for anyone who wants to learn about writing Office add-ins for Excel, Word, or PowerPoint.

Office Scripts

Use Office Scripts in Excel on the web to automate your common tasks. Learn how to create and edit Office Scripts and get started automating today.

Fluent UI

The official front-end framework for building experiences that fit seamlessly into Microsoft 365.

Developer Tools

Use our developer tools to build solutions for consumer and professional markets.

Office developer community

Questions

Ask questions on Microsoft Q&A.

Feature requests

Request a feature on Microsoft Tech Community.

Office assisted support

Premier/Unified Support customers get enterprise-level support for Office development.

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