WASM Memory Tools

A Chrome extension to inspect and manipulate WebAssembly memory at runtime. Read, view, and copy memory values to assist in reverse engineering

What is it?

WASM Memory Tools is a developer tool that lets you view, read, write, and search through a WASM module’s memory in real time using a clean, interactive DevTools panel. It's built for reverse engineers, cybersecurity researchers, and WebAssembly developers.

Features

• ✅ Read and write all major data types (Int8, Int16, Int32, Int64, Float32, Float64)
• ✅ Read and write strings and byte arrays
• ✅ Search memory for values or strings
• ✅ View memory contents as:
  • Decimal
  • Hexadecimal
  • Character
• ✅ Easy-to-use DevTools panel
• ✅ Injected memory wrapper class (MemoryWrapper) accessible from the console
• ✅ Works on all pages running WebAssembly modules

How It Works

The extension injects a helper class (MemoryWrapper) into every page that uses WebAssembly. This class simplifies reading and writing directly to the WASM memory buffer.

Once the page loads, open your browser DevTools and go to the "WASM Memory tools" tab to explore and manipulate memory.

UI Overview

The DevTools panel provides:

• Input fields to read/write memory at specific addresses
• Buttons to search values or strings
• A display of the result in decimal, hexadecimal, and ASCII

Installation

1. Download the extension from:
   • Chrome Web Store
   • Firefox Add-ons (coming soon)
2. Or install manually for development:
   • Clone this repo
   • Open chrome://extensions/ in your browser
   • Enable Developer mode
   • Click Load unpacked
   • Select the project folder

Acknowledgments

This extension integrates the excellent WASMToolkit library by Excellium SA, which provides the core memory manipulation functions.
Special thanks to their team for open-sourcing such a solid foundation.

Author

Made by mabslabs.com
GitHub: https://github.com/kernel64

License

Licensed under the MIT License.