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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 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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Office Add-ins community call – June 2021

This month's community call features presentations - Excel v1.13 API updates (highlights 2 new APIs), Outlook Add-ins - Build 2021 recap (hi...
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Word Style Checking Add-in Built on Angular 2.0

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Demo - Create and add Office 365 Connectors to teams

In this demo, you'll learn how to create a web service project and a configuration page for a new Office 365 Connector use it within a team ...
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Demo - Register and test an Office 365 Connector

In this demo, learn how to register your web service as an Office 365 Connector in the Connector Developer Dashboard and test it after updat...
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Demo - Create incoming webhooks

In this demo, you’ll see how to register an incoming webhook in a Microsoft Teams channel and post a message card to it using the popular Po...
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Use incoming webhooks as Connectors

In this video, you’ll learn how to register an incoming webhook in a Microsoft Teams channel and post a message card to it using the popular...
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Demo - Create outgoing webhooks

In this demo, you’ll learn how to create a web service in a project and register it as an outgoing webhook in a channel in the Microsoft Tea...
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Training and certification

Explore learning paths and become a certified Microsoft 365 developer.

Training Certification

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Bring your solutions to market

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
Sample data packs to automate configuration of your developer sandbox
Access to a community of Microsoft 365 experts
Personalized content recommendations

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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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Community calls

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