ASCII Tree Generator is a free online tool that turns a folder into a clean ASCII tree diagram for your README, documentation, or code comments. Upload a directory, paste an existing ASCII tree to edit it, or build the tree by hand, apply .gitignore-style filters, customize the branch style, and copy the result. It runs entirely in your browser — your files never leave your device, and no signup is required.
Features: folder upload, importing an existing ASCII tree by pasting it, manual file and folder editing, drag-and-drop reordering, .gitignore-style filtering, customizable branch prefixes and indent width, a live preview, one-click copy, and dark/light mode. This app requires JavaScript to run.