Microsoft 365 Dev Center

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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Word Style Checking Add-in Built on Angular 2.0

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Five new features enhancing Adaptive Cards in Microsoft Teams

Learn about the new Adaptive Cards features that will simplify workflows and user interaction models for your bots and work across multiple ...
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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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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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New renewal offering for your app’s Publisher Attestation and Microsof...

The Microsoft 365 App Compliance Program now offers an annual renewal process for app developers to update their existing Publisher Attestat...
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Microsoft Graph community call – May 2021

This month's community call features presentations on Application Consent Deep Dive (demystifying permissions and consent when accessing Mic...
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Understanding the Office Add-ins runtime

Learn about the latest changes in Office's use of web runtimes as well as the runtimes that we've used on various platforms in the past.
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