Trusted by 2 Mn+ QAs & Devs to accelerate their release cycles
The asm.js subset of JavaScript provides low-level, portable performance with high-level language semantics. Asm.js is intended to be a target for a compile step from languages like C/C++ into optimized JavaScript.
Last updated on : 2023-03-20
Browser Versions
IE
Edge
Firefox
Chrome
Safari
Opera
Fully Supported
Partially
No Support
asm.js on IE is not supported on any IE versions.
asm.js on Edge is fully supported on 13-18, partially supported on 79-111, and not supported on 12-12 Edge versions.
asm.js on Firefox is fully supported on 22-113, and not supported on 2-21 Firefox versions.
asm.js on Chrome is partially supported on 28-114, and not supported on 4-27 Chrome versions.
asm.js on Safari is not supported on any Safari versions.
asm.js on Opera is partially supported on 15-95, and not supported on 9.5-12.1 Opera versions.
asm.js on Safari on iOS is not supported on any Safari on iOS versions.
asm.js on Android Browser is partially supported on 97-111, and not supported on 2.1-4 Android Browser versions.
asm.js on Opera Mobile is partially supported on 64-73, and not supported on 10-12 Opera Mobile versions.
asm.js on Chrome for Android is partially supported on all Chrome for Android versions.
asm.js on Firefox for Android is fully supported on all Firefox for Android versions.
asm.js on Samsung Internet is partially supported on 5-20, and not supported on 4-4 Samsung Internet versions.
Data sourced from
Overall Browser Compatibility Score
Note:asm.js shows a browser compatibility score of 75. This is a collective score out of 100 to represent browser support of a web technology. The higher this score is, the greater is the browser compatibility. The browser compatibility score is not a 100% reflection for every browser and the web technology support. However, it does give you an estimate on how much you should rely on a particular web technology in terms of browser compatibility.
Test on 3000+ browsers for asm.js & more
Test your website for asm.js and other web technologies. Get 100 FREE automation test minutes!
Test NowKaneAI - Testing Assistant
World’s first AI-Powered E2E testing agent.
Did you find this page helpful?