wasm-interp - Man Page

decode and run a WebAssembly binary file


wasm-interp[options] file


wasm-interp decodes and runs a WebAssembly binary file using a stack-based interpreter.

The options are as follows:

-v, --verbose

Use multiple times for more info


Print a help message


Experimental exception handling


Import/export mutable globals


Saturating float-to-int operators


Sign-extension operators


SIMD support


Threading support

-V, --value-stack-size=SIZE

Size in elements of the value stack

-C, --call-stack-size=SIZE

Size in elements of the call stack

-t, --trace

Trace execution


Run all the exported functions, in order. Useful for testing


Include an importable function named "host.print" for printing to stdout


Parse binary file test.wasm, and type-check it

$ wasm-interp test.wasm

Parse test.wasm and run all its exported functions

$ wasm-interp test.wasm --run-all-exports

Parse test.wasm, run the exported functions and trace the output

$ wasm-interp test.wasm --run-all-exports --trace

Parse test.wasm and run all its exported functions, setting the value stack size to 100 elements

$ wasm-interp test.wasm -V 100 --run-all-exports

See Also

wasm-objdump(1), wasm-opcodecnt(1), wasm-strip(1), wasm-validate(1), wasm2c(1), wasm2wat(1), wast2json(1), wat-desugar(1), wat2wasm(1), spectest-interp(1)


If you find a bug, please report it at

Referenced By

spectest-interp(1), wasm2c(1), wasm2wat(1), wasm-decompile(1), wasm-objdump(1), wasm-opcodecnt(1), wasm-strip(1), wasm-validate(1), wast2json(1), wat2wasm(1), wat-desugar(1).

February 5, 2021