FileConcat

FileConcat is a free, open-source utility that concatenates a folder or repository of code, documents, PDFs, and other text-based files into a single, structured, AI-optimized text document. It runs entirely in the browser—no uploads, no accounts—and includes a CLI version for local workflows. The tool automatically skips binary and irrelevant files (like node_modules), generates an ASCII directory tree, wraps each file in <file path> tags, applies language-typed markdown fences, and counts tokens. It is explicitly designed to prepare context for large language models like ChatGPT, Claude, and Gemini, but currently has no revenue model, no apparent team size, and uncertain growth trajectory. Its clean landing page and sharp copywriting position it as a privacy-respecting, zero-friction solution for developers and researchers frequently prompting AI with whole codebases or document sets.