File Concat Tool

File Concat Tool is a free, fully offline tool built to combine and format multiple files for use with AI assistants such as ChatGPT and Claude. Instead of copying and pasting files one by one, you can bring everything together in a single step and get a clean, structured result every time.

It supports a wide range of file types, including code, documents, and configuration files, so whether you are sharing a project with an AI, debugging code, or passing along settings, the tool has you covered.

Everything is processed securely on your local machine, meaning your files never leave your computer. This makes it a safe choice for sensitive codebases, private documents, and confidential work.

The tool prepares files for AI and LLM assistants by concatenating them into a single, well-formatted document optimized for Large Language Models (LLMs), helping the AI read and understand your content more effectively.