A fast, open source
web browser engine.

WebKit is the web browser engine used by Safari, Mail, App Store, and many other apps on macOS, iOS, and Linux. Get started contributing code, or reporting bugs.

Web developers can follow development, check feature status, download Safari Technology Preview to try out the latest web technologies, and report bugs.

Release Notes for Safari Technology Preview 129

Release Notes for Safari Technology Preview 129

Safari Technology Preview Release 129 is now available for download for macOS Big Sur and betas of macOS Monterey.

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PCM:
Click Fraud Prevention and Attribution Sent to Advertiser

PCM:
Click Fraud Prevention and Attribution Sent to Advertiser

Earlier this year, Safari was the first browser to ship a proposed web standard for measuring advertising in a privacy-preserving way – Private Click Measurement, or PCM.

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Optimizing JavaScript Standard Library Functions in JSC

Optimizing JavaScript Standard Library Functions in JSC

After three years working on JavaScriptCore (JSC), I recently had the opportunity to work on optimizing one of our standard library functions for the first time.

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WebKit Features in Safari at WWDC21

WebKit Features in Safari at WWDC21

There’s a lot of news coming out of WWDC21 about WebKit and the web technology that’s shipping in Safari 15 on Apple’s platforms.

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MotionMark 1.2

MotionMark 1.2

Today we are announcing an update to the MotionMark benchmark.

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