Fixed-width SIMD (WebAssembly)

128-bit SIMD (Single Instruction Multiple Data) performs one instruction on multiple units of data, when running on hardware that supports such instructions. Also known as vector instructions.

Baseline Status: Achieved Widely Available on Sep 27, 2025 (Cross-browser Newly Available since Mar 27, 2023).

Desktop Browser Engine Support

Google Chrome

91

Supported

Mozilla Firefox

89

Supported

Apple Safari

16.4

Supported

Microsoft Edge

91

Supported

Mobile Browser Engine Support

Chrome Android

91

Firefox Android

89

Safari iOS

16.4

Specifications and References

Specification ↗ Can I Use (wasm-simd) ↗ Feature XML ↗

MDN Browser Compat Data Keys:

webassembly.fixed-width-SIMD ↗