Build powerful applications for Office

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

Featured tools

Script Lab

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

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.

Bring your Office solutions to market

Submit your Office app to Microsoft AppSource to make it available to millions of consumers and businesses. Explore the expanding list of Office Add-ins partner apps and find inspiration for your own solutions.

Office developer resources


Community calls

Microsoft Q&A forum

What's new in Office Add-ins

Back to top