This MkDocs plugin finds all folders with a certain name, by default assets-large, resizes all images in those folders according to the plugin configuration. Then saves the resized images in a different folder, by default assets. The plugin also supports caching: if a file has not changed since the last time the plugin ran, it won't be processed again.

Install the plugin using pip from PyPI:

pip install mkdocs-resize-images

Activate the plugin in mkdocs.yml:

plugins:
  - search
  - resize-images

Create .gitignore file in your project root directory and add the following line to it:

assets-large # or whatever you have set as source-dir
.resize-hash # if you have enabled caching

By default, the plugin will look for images in all directories named assets-large, resize them to 800x600 pixels, and then save the resized images in assets directories in the same parent directories as the assets-large directories.

You can configure the plugin in your mkdocs.yml:

plugins:
  - search
  - resize-images:
      source-dir: assets-large
      target-dir: assets
      enable_cache: True
      size: [800, 600]
      extensions: ['.jpg', '.jpeg', '.png', '.gif', '.svg']

source-dir: The name of the directories to search for images to resize. Default is assets-large.

target-dir: The name of the directories to save the resized images in. Default is assets.

size: The size to resize the images to, specified as [width, height]. Default is [800, 600].

extensions: List of image file extensions to consider for resizing. The plugin will look for images with these extensions in both lower and upper case. Default is ['.jpg', '.jpeg', '.png', '.gif', '.svg'].

enable_cache: Whether to enable caching. If enabled, the plugin will check if a file has changed since the last time the plugin ran, and if not, it won't process the file again. Default is True.

debug: Option to enable debug output. Default is False.