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wasm2wat - Man Page

translate from the binary format to the text format

Examples (TL;DR)


wasm2wat[options] file


wasm2wat Read a file in the WebAssembly binary format, and convert it to the WebAssembly text format.

The options are as follows:


Print a help message


Print version information

-v, --verbose

Use multiple times for more info

-o, --output=FILENAME

Output file for the generated wast file, by default use stdout

-f, --fold-exprs

Write folded expressions where possible


Enable Experimental exception handling


Disable Import/export mutable globals


Disable Saturating float-to-int operators


Disable Sign-extension operators


Disable SIMD support


Enable Threading support


Enable Typed function references


Disable Multi-value


Enable Tail-call support


Disable Bulk-memory operations


Disable Reference types (externref)


Enable Custom annotation syntax


Enable Code metadata


Enable Garbage collection


Enable 64-bit memory


Enable Multi-memory


Enable Extended constant expressions


Enable all features


Write all exports inline


Write all imports inline


Ignore debug names in the binary file


Ignore errors in custom sections


Give auto-generated names to non-named functions, types, etc.


Don't check for invalid modules


Parse binary file test.wasm and write text file test.wast

$ wasm2wat test.wasm -o test.wat

Parse test.wasm, write test.wat, but ignore the debug names, if any

$ wasm2wat test.wasm --no-debug-names -o test.wat

See Also

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

February 3, 2024