GitHub code tree on steroids
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OpenCollective OpenCollective


Browser extension (Chrome, Firefox, Opera and Safari) to show a code tree on GitHub. Awesome for exploring project source without having to pull every single repository to your machine. Features:

  • Easy-to-navigate code tree, just like in IDEs
  • Fast browsing with pjax
  • Support private repositories (see instructions)
  • Support GitHub Enterprise (Chrome and Opera only, see instructions)

Octotree on GitHub

Install on Chrome, Firefox and Opera

Note: to configure Octotree for GitHub Enterprise, see instructions

Install on Safari

Octotree is not available on the Safari gallery. You have to build from source. Download this repo and run the following command:

gulp safari

Find the extension folder in tmp/safari. Follow Apple instructions to install the extension to your browser.

Install from prebuilt packages (all browsers)

Prebuilt packages are available in the dist folder. For security reason, only download Octotree from this location.

Note: Firefox 43+ requires add-ons to be signed. Therefore, you should install Octotree from the Mozilla store. For some reason if you want to install the prebuilt package instead, you have to disable sign-check.


Access Token

Note for the paranoids (like me!): Octotree stores access tokens in your browser local storage and never transmits it anywhere.


Octotree uses GitHub API to retrieve repository metadata. By default, it makes unauthenticated requests to the GitHub API. However, there are two situations when requests must be authenticated:

When that happens, Octotree will ask for your GitHub personal access token. If you don't already have one, create one, then copy and paste it into the textbox. Note that the minimal scopes that should be granted are public_repo and repo (if you need access to private repositories).

Enterprise URLs

By default, Octotree only works on To support enterprise version (Chrome and Opera only), you must grant Octotree sufficient permissions. Follow these steps to do so:

  • Go to any GitHub repo
  • Open the Octotree settings panel


  • Fill in the GitHub Enterprise URLs textbox, one URL per line
  • Click Save and accept the permission prompt
  • Navigate to your GitHub Enterprise site
  • You might be asked to create an access token


  • Hotkeys: Octotree uses keymaster to register hotkeys. Check out the supported keys.
  • Remember sidebar visibility: if checked, show or hide Octotree based on its last visibility.
  • Show in non-code pages: if checked, allow Octotree to show in non-code pages such as Issues and Pull Requests.
  • Load entire tree at once: if checked, load and render the entire code tree at once. To avoid long loading, this should be unchecked if you frequently work with very large repos.
  • Show only pull request changes (new!): if checked and in "Pull requests" page, only show the change set of the pull request.


  1. Install node 8 or above
  2. Run npm install to install dependencies
  3. Run npm run build to watch code changes and build unpacked extensions
  4. Install unpacked extentions in the tmp folder (check specific browser instructions)
  5. Please follow existing style for new code



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