How to Compare Two PDF Files and Spot the Differences

A contract comes back from the other side, an updated form arrives, or a colleague sends "final_v3.pdf". It looks the same as the last one, but is it? Reading two long documents side by side to find one changed number or a new clause is slow, and it is easy to miss something important.

The faster way is to compare the two PDFs and let the tool show you the differences.

When do you need to compare PDFs?

• A contract or agreement came back with edits you did not expect
• You have an old and a new version of a report or a form
• A price list, invoice or quotation was updated and you want to see what changed
• You want to be sure a file was not changed after you approved it

How to compare two PDFs step by step

1. Open the Compare PDF tool. Use the button at the top of this page to open Pdfyra Workspace.
2. Add the first PDF. In the First PDF box, select your file.
3. Add the second PDF. In the Second PDF box, select the other file.
4. Tap Compare PDFs. Pdfyra checks both files and shows the differences.
5. Review the changes. Go through them one by one before you approve or send anything.

Tips for a clear comparison

Put the older file first. The older version as the first PDF and the newer one as the second makes the changes easier to follow.

Compare the same kind of file. Two versions of one document give the best result. Two completely different documents will show differences everywhere.

Check numbers and dates with extra care. Amounts, dates and names are the changes that matter most.

Scanned copies? If one file is a scan, text may not compare well. First read about how to extract text from a scanned PDF.

Keep both originals. Comparing does not change your files, but keep both versions until you have approved the final one.

Approved the final version? You can sign the PDF, add a watermark or lock it with a password.

Need only the changed pages? See how to extract pages from a PDF.

File too large to email? See how to compress a PDF.

Ready to compare?

Open the tool, add both PDFs and see what changed in a few taps.