Hi Ohana,
We are in process of moving knowledge Articles.
Source HTML files have image references in Base64 code instead of actual file references. SF knowledge import tool is unable to parse Base64,expects image references.
Each HTML file has 15+ image references,with thousands of knowledge articles(HTML files). 
Appreciate solution here: Tool/code which can convert base64 to images and update html with image references or workarounds.
Thanks much in advance
Ajay