V8 JavaScript engineWhat is V8? V8 is Google’s open source high-performance JavaScript and WebAssembly engine, written in C++. It is used in Chrome and in Node.js, among others. It implements ECMAScript and WebAssembly, and runs on Windows, macOS, and Linux systems that use x64, IA-32, or ARM processors. V8 can be embedded into any C++ application.Latest posts and feature explainers How we made JSON.stringify more than twice as fast 04 August 2025 internalsSpeculative Optimizations for WebAssembly using Deopts and Inlining 24 June 2025 WebAssembly internalsJavaScript's New Superpower: Explicit Resource Management 09 May 2025 ECMAScriptGiving V8 a Heads-Up: Faster JavaScript Startup with Explicit Compile Hints 29 April 2025 JavaScriptLand ahoy: leaving the Sea of Nodes 25 March 2025 JavaScript internalsTurbocharging V8 with mutable heap numbers 25 February 2025 JavaScript benchmarks internalsIntroducing the WebAssembly JavaScript Promise Integration API 01 July 2024 WebAssemblyWebAssembly JSPI has a new API 04 June 2024 WebAssemblyThe V8 Sandbox 04 April 2024 securityIterator helpers 27 March 2024 ECMAScriptMore articles can be found in the blog archive and the features section.