I think there is not a reliable free tool. But if you wisely use free trials (cancel the subscription on time), it can give the result and cost nothing. I do such a thing to make a pdf from a html and it works.
Click the Select a file button above or drag and drop a PDF into the drop zone. Select the PDF you want to convert to the DOCX file format. Watch Acrobat automatically converts the file from PDF to Word document. Download the converted Word document or sign in to share it.