Convert ChatGPT Conversations to HTML

Use

Export your conversations at ChatGPT: Profile / Settings / Data Controls / Export Data / Export.
Upload the exported ZIP file here (max 1 GB).

It will try to do something with all content types.
When selecting Output: Download the generated conversations.html should be stored in the same folder as conversations.json to correctly render images. Intentionally it only contains the body part of the page, and CSS is only applied to managing the collapsible sections.
The uploaded ZIP file and extracted files will be deleted after an hour. Nothing is saved of the content.