Which Browsers Support WebAssembly by Default?

WebAssembly (Wasm) has become a foundational technology for the modern web, enabling high-performance, compiled code to run in the browser alongside JavaScript. This article lists the major desktop and mobile web browsers that currently support WebAssembly by default and highlights the broad ecosystem compatibility that developers can rely on today.

Major Desktop Browsers Supporting WebAssembly

All major desktop web browsers support WebAssembly by default. The implementation of Wasm was coordinated among the major browser engines, leading to widespread adoption starting in 2017.

• Google Chrome: WebAssembly has been supported by default since Chrome 57 (released in March 2017).
• Mozilla Firefox: Support has been enabled by default since Firefox 52 (released in March 2017).
• Apple Safari: Support is enabled by default starting with Safari 11 (released in September 2017).
• Microsoft Edge: WebAssembly is supported in Microsoft Edge. Original Edge (EdgeHTML) supported it starting with version 16 (October 2017), and all subsequent Chromium-based versions of Edge support it natively.
• Opera: Support has been enabled by default since Opera 44 (released in April 2017).

Major Mobile Browsers Supporting WebAssembly

Mobile browsers share the same engines as their desktop counterparts, meaning WebAssembly support is also virtually universal on modern mobile devices.

• Google Chrome for Android: Fully supported.
• Apple Safari on iOS: Supported on iOS 11 and later.
• Mozilla Firefox for Android: Fully supported.
• Samsung Internet: Fully supported since Samsung Internet 6.2.

Summary of Support Status

Because WebAssembly is an official World Wide Web Consortium (W3C) standard, any modern, regularly updated browser supports it out of the box. Globally, over 97% of active web users run browsers that support WebAssembly by default. The only notable browsers that lack support are legacy platforms, such as Microsoft Internet Explorer, which has been officially retired.