How can I save all images inside in a .docx to TIFF format?
We intend to submit an article with the requirement that all its figures are shipped separately in TIFF format.
You could open the .DOCX file with a Zip decompression utility (either the one built into Windows, or perhaps 7-Zip or alike).
Once you have it open you can navigate to the "Word" folder contained in the file, and the "Media" sub-folder inside that.
In there you should see all of your images (etc.), and you can just copy/drag-n-drop them out onto the desktop, or another working folder.