A README, a bug report or a question to ChatGPT or Claude (“where should I change this in my project?”) often needs the folder structure as text. Drop the folder, open the Text view and you get this:

my-app/
├── public/
│   └── logo.png
├── src/
│   ├── app/
│   │   ├── layout.tsx
│   │   └── page.tsx
│   └── lib/
│       └── utils.ts
├── package.json
└── README.md

Steps

1. Drag a folder onto the page or press “Choose folder”. On a phone, use “Open ZIP”.
2. In the Text view, pick a depth (1 to 5 levels, or all), folders only, and whether to show sizes.
3. Choose plain text, Markdown or JSON, then Copy or Save. “Copy for AI chat” adds one line of context and wraps the tree in a code block.

Compared with the tree command

On Windows, tree /f in Command Prompt prints the same shape; on a Mac you install tree with Homebrew. Both run in a terminal, need extra flags to skip node_modules and don't total sizes. Here node_modules, .git, .next, dist and build are left out of code projects by default, and your project's .gitignore rules can apply too.

Token count

Next to the text you see an approximate token count (characters ÷ 4). If the tree is too long for a chat, lower the depth or switch on “Folders only”.

When a disk is full, a picture beats a list. The answer line says how big the folder is, how many files it has and what the biggest part is (with its share). In the treemap, bigger folders get bigger blocks.

• Treemap: click a big block to go inside; use the path above it to come back out.
• Table: “100 biggest files” sorts by size; filter by extension to see only videos. Save as CSV for a spreadsheet.
• Types: space by kind: video, images, documents, code, archives and installers. Old installers (.dmg, .exe) in Downloads are often bigger than you think.
• Tree: the folder grows as a 3D tree. Branch thickness is size, the biggest file hangs as the biggest fruit, and bare twigs are empty folders.

Start with Downloads, Documents, Pictures or Movies rather than a whole drive. This tool never deletes anything: once you know what to remove, do it in Explorer or Finder.

Your folder is read inside this browser only. This is a static page with no server behind it, so there is nowhere for your file list to go. The page also carries a security rule (CSP) that blocks connections to anything but this site and Google Analytics.

• Read: file and folder names, paths, sizes and modified dates.
• Not read: file contents. The one exception is your .gitignore, when “Use .gitignore” is on.
• ZIP: nothing is extracted; only the list at the end of the zip is read.
• Analytics: only which view you chose and a size bucket (e.g. 10k to 100k items). Never names, paths or sizes.

Some browsers show “Upload N files to this site?” when you choose a folder. That is the browser's fixed wording; nothing is sent. Try it offline if you like: it still works.

Before sharing a picture, switch on “Hide names” to show “folder-1”, “file-3.jpg” instead. The share card hides names by default.