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WebAssembly Threads and Atomics

An extension to WebAssembly adding shared memory and atomic memory operations

Last updated on : 2025-03-16

Browser Versions

Edge

Firefox

Chrome

Safari

Opera

5.5 - 11

12 - 18

79 - 133

2 - 78

79 - 138

4 - 73

74 - 136

3.2 - 14

14.1 - 18.4

9.5 - 60

62 - 114

Fully Supported

Partially

No Support

Browser Compatibility

WebAssembly Threads and Atomics on IE is not supported on any IE versions.

WebAssembly Threads and Atomics on Edge is fully supported on 79-133, and not supported on 12-18 Edge versions.

WebAssembly Threads and Atomics on Firefox is fully supported on 79-138, and not supported on 2-78 Firefox versions.

WebAssembly Threads and Atomics on Chrome is fully supported on 74-136, and not supported on 4-73 Chrome versions.

WebAssembly Threads and Atomics on Safari is fully supported on 14.1-18.4, and not supported on 3.2-14 Safari versions.

WebAssembly Threads and Atomics on Opera is fully supported on 62-114, and not supported on 9.5-60 Opera versions.

WebAssembly Threads and Atomics on Safari on iOS is fully supported on 14.5-18.4, and not supported on 3.2-14 Safari on iOS versions.

WebAssembly Threads and Atomics on Android Browser is fully supported on 123-133, and not supported on 2.3-4 Android Browser versions.

WebAssembly Threads and Atomics on Opera Mobile is fully supported on 80-80, and not supported on 10-12 Opera Mobile versions.

WebAssembly Threads and Atomics on Chrome for Android is fully supported on all Chrome for Android versions.

WebAssembly Threads and Atomics on Firefox for Android is fully supported on all Firefox for Android versions.

WebAssembly Threads and Atomics on Samsung Internet is fully supported on 11.1-27, and not supported on 4-10.1 Samsung Internet versions.

Browser Support for WebAssembly Threads and Atomics

WebAssembly Threads and Atomics on Chrome

WebAssembly Threads and Atomics on Safari

WebAssembly Threads and Atomics on Firefox

WebAssembly Threads and Atomics on Internet Explorer

WebAssembly Threads and Atomics on Opera

WebAssembly Threads and Atomics on Edge

References

Data sourced from

High

Overall Browser Compatibility Score

Note:WebAssembly Threads and Atomics shows a browser compatibility score of 88. 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.

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