Free software to edit a pdf file?

[Bob]

I've got a static pdf file.  I'd like to add a little more information into it, but it's not the editable kind of pdf.

Is there a freebie program out there that will allow me to do that?  I don't think I need to make any huge changes, just tack in some more information in the white space.  That should work.  I don't need to cut and move anything.  (I think.)

There must be something like that out there for free.  Hmmm....

[Bob]

Interesting.  I found this.  Seems to work.

https://www.pdftoword.com/success_page.htm

You upload your pdf file and it converts it to .doc or .rtf and then they email it to you.  Except you have to give them an email address and the file doesn't arrive immediately.  Then print it out to a pdf after editting.