ChatGPT Splitter allows you to upload multiple files and have them split into multiple chunks, which you can load to ChatGPT. Upload docx, code, PDF or image and click process. Then follow the generated sections, copy each chunk and feed it to ChatGPT. After you’re done, ChatGPT will know the context of your documents and you can use it in your follow-up prompts:
https://chatgptsplitter.com