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Write WAT, compile to .wasm bytes, call exported functions, download the binary.
libwabt (WebAssembly Binary Toolkit) compiled to WASM itself parses WAT and emits real .wasm bytes. The binary is instantiated in-browser and you can call any function export with comma-separated args.
Write WebAssembly Text format (.wat) and watch it compile to real .wasm bytes you can run in your browser. Call exported functions with form-driven arguments, view the compiled binary as a hex dump, and download the .wasm file. Powered by libwabt (the official WebAssembly Binary Toolkit) compiled to WASM itself.
Learn how to write WebAssembly Text format, compile it to binary, and execute functions directly in your browser.
Write your WebAssembly Text code
Enter your .wat code into the editor using the official WebAssembly Text format syntax. The playground uses libwabt to process your input in real-time.
Compile WAT to WASM bytes
The tool automatically compiles your text into a binary .wasm file. You can view the resulting hex dump to inspect the compiled binary structure.
Execute exported WASM functions
Use the form-driven interface to select exported functions and provide required arguments. Run the code to see immediate output within your browser environment.
Download the compiled binary file
Save your work by downloading the final .wasm file to your local machine. This binary is ready to be used in any WebAssembly-compatible runtime.
Estimated time: PT2M
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