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Figma uses it for their design editor.

PSPDFKit uses it for their pdf editor.

Unreal Engine/Unity uses it for their browser support.

It's used in production in many places either as modules or entire apps.

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1password recently moved their browser plugin too https://blog.1password.com/1password-x-may-2019-update/

Figma uses Emscripten which is technically not Webassembly (to my knowledge)

Emscripten has been able to compile to WASM since before WASM was implemented in browsers. It became the default output earlier this year.

Some more detail: Emscripten has defaulted to emit wasm even earlier, in May 2018. The change this year was to switch how that wasm is emitted, from the old fastcomp+asm2wasm path to the new LLVM wasm backend.

I was actually thinking about the switch from asm.js to WASM (v1.38.1) but apparently that was last year. Whoops!

Emscripten has a WASM backend, it was originally JavaScript only.

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