• build smarter apps with Excel

    Build powerful applications for Excel

    Extend Excel functionality and access Excel data over the web

Extend Excel functionality with Office Add-ins

Access Excel data with Microsoft Graph

New additions to Excel JavaScript APIs

Learn about recent additions to the Excel JavaScript APIs including the general availability of requirement sets 1.5 and 1.6 and public preview (beta) access for additional APIs.

Script Lab, a Microsoft Garage Project

Create, run, and share your own Excel add-in code directly from Excel and explore the collection of built-in code snippets.

Create custom functions in Excel

Write JavaScript functions that users can include in Excel formulas, as part of your add-in. Try it today in preview!

Microsoft Graph Explorer updated -- now with sample queries

Discover and run sample queries for Excel by using the Microsoft Graph Explorer.

Get resources