File Content Extractor & Combiner

This tool can merge all supported text files (such as .js, .html, .css, .md, etc.) in a folder into a single text file.
Main use case: When you need to provide entire project code to large language models (like GPT, Gemini) for analysis or questioning, manually copying and pasting is very tedious. This tool allows you to package all code with one click.
Privacy & Security: All operations are completed in your browser. Files are not uploaded to any server, so feel free to use.