Give users the ability to block certain content types on Safari on macOS and iOS. Built with Xcode, these app extensions are designed for speed and don’t slow down browsing. And because extensions never see what webpages users visit, user data is protected.
Extend the web-browsing experience by allowing Safari to read and modify webpage content on macOS. Safari App Extensions are built with Xcode and can communicate and share data with native apps — so you can integrate app content into Safari or send web data back to your app to create a unified experience.
The new Extensions category on the Mac App Store showcases Safari extensions, with editorial spotlights and top charts to help users discover and download great extensions from the developer community. When your Safari Extension is ready to be released, upload it to App Store Connect for distribution on the App Store. Apple reviews all extensions and updates to ensure they work reliably. Before submitting for review, make sure to read the guidelines for extensions.
Converting Legacy Safari Extensions
Legacy Safari Extensions (.safariextz files) built with Safari Extension Builder are not supported in Safari 13 on macOS Catalina, macOS Mojave, or macOS High Sierra. The Safari Extensions Gallery for legacy extensions will no longer be available in September, 2019. Users on macOS High Sierra or later can easily find extensions on the Mac App Store by choosing Safari Extensions from the Safari menu.
If you distribute legacy extensions built with Safari Extension Builder, we recommend converting them to the new Safari App Extension format, test on the latest version of Safari 13, and submit them to the Mac App Store or notarize them for distribution outside the Mac App Store.