Question 1

How do I find the differences between two PDF files?

Accepted Answer

Drop both files here. Every word that was added or removed is listed with its page number and highlighted in both documents, and the Pages as pictures view marks anything that looks different on the page, such as a changed drawing or a moved logo.

Question 2

Will it show changes to formatting, like bold or font size?

Accepted Answer

Not as text changes - the comparison is of the words themselves. A change of font, size or colour does show up in Pages as pictures, where the two pages are overlaid and every pixel that differs is marked in red.

Question 3

Is this the same as Adobe Acrobat’s Compare Files?

Accepted Answer

It does the same core job - listing what was added and removed between two versions - without a subscription and without uploading either document. Acrobat also reports style changes by name; here those show up visually instead.

Question 4

Why is a whole page marked as different in the picture view?

Accepted Answer

Because something earlier in the document pushed its contents up or down - an added line moves everything below it, so the page looks different everywhere. The word comparison is not affected by that and still shows the actual change.

Compare two PDFs