Can this show me who last edited the file?

It shows the Author/Producer fields the PDF was saved with, if the software that created it set them.

PDF Metadata Viewer

PDF Metadata Viewer shows a PDF's title, author, subject, keywords, creation date, and other document properties.

Click to upload a fileor drag and drop

Set a PDF's title, author, and other properties.

Reduce a PDF's file size.

Combine multiple PDF files into one document.

Split a PDF into individual single-page files.