WASM Module Runner
Client-side WebAssembly sandbox. Inspect WASM module exports and benchmark executions.
Upload .wasm File
Drag and drop or click to browse
Execute Function
What is this tool?
A secure, client-side WebAssembly (WASM) sandbox that allows you to upload compiled .wasm modules, inspect their exported functions, and execute them directly in the browser.
How to run WebAssembly modules
- Upload a valid compiled .wasm binary file.
- The tool will parse the module and list all exported executable functions.
- Select the function you wish to test and enter any required numerical arguments.
- Click 'Execute' to run the function within a sandboxed Web Worker.
- Review the execution output and the precise performance benchmark.
Key Features
- Dynamic WASM export parsing and inspection
- Isolated execution environment using Web Workers
- High-resolution performance benchmarking
- Supports multiple numerical arguments
Frequently Asked Questions
Why do some WASM modules fail to load?
The sandbox currently supports standalone WASM modules. If your module requires complex JavaScript bindings, imported memory, or a specific WASI environment (like full Emscripten builds), it may fail to instantiate.
Is it safe to run untrusted WASM files here?
Yes. WebAssembly is fundamentally sandboxed by the browser's security model. The execution happens within a restricted Web Worker with no access to the DOM or your local filesystem.
Privacy First
WASM modules are parsed and executed entirely within your browser's local memory. No binary files or execution results are ever sent to a server.