MashuPack

MashuPack is a browser-based tool that takes a folder from your computer—like a code repository—and packages it into one clean, organized text file. It scans the folder locally, excludes binary files automatically, and outputs a document with a clear directory map and each file's content marked with start and end headers. This structured output is designed to be pasted directly into AI chat interfaces. The entire process happens in your browser; no files are uploaded to any server, keeping your code private.

It works by using your browser's File System Access API to read folders you drag and drop. The core logic for building the file tree and managing selections is written in Rust and runs in a Web Worker, making it fast even for large projects. Key features include a live file tree you can browse, the ability to select specific files or file types for export, and a token estimator to check if your output will fit an AI model's context window before you download. The exported text uses explicit path markers, which helps AI tools navigate the content as if it were a real project.

This tool is most useful for developers and technical writers who need to share code context with AI assistants for analysis, debugging, or documentation. A common use case is preparing a codebase to ask Claude or ChatGPT questions about its structure, to find a specific function, or to trace dependencies. It's also handy for creating portable, text-based snapshots of a project's state that are easy to share and search.