There is currently one tool: `embed-images`. This will embed all externally-referenced images (e.g. `<img src="http://...">`) into the ePub file. It will also optimize the images while downloading for a specific device profile (the default is the Kindle Paperwhite 2024).

Pre-built binaries are available for most platforms on the [releases page](https://github.com/codetheweb/epub-tools/releases). I recommend using [Eget](https://github.com/zyedidia/eget) to download the appropriate binary: