Compare Two PDFs
Upload two PDFs to compare their text content line by line.
Drop PDF A
Drop PDF B
About the Compare Two PDFs
PDF Compare extracts the text from two PDF files and shows what was added, removed or changed, line by line. It helps you review contract revisions, check a new version of a report against the old one, or confirm that two exports contain the same wording.
The tool reads the text layer of each PDF and compares the text content, not the visual appearance. Differences in images, fonts, colours or layout are not detected. Scanned PDFs that contain only pictures of text have no text layer, so there is nothing to compare unless you first make them searchable with OCR. Because text is extracted in reading order, a change in page layout can show up as a difference even if the words are the same.
How to use it
- Upload the first PDF (the original).
- Upload the second PDF (the revised one).
- Press Compare.
- Review the highlighted additions and removals in the Differences list.
Tips and good to know
- Compare the final versions, not drafts with comments.
- If everything shows as different, the PDFs may be scanned images.
- For legal documents always read the document yourself as well.
Frequently asked questions
Does it compare images and formatting?
No, only text.
Can it compare scanned documents?
Only if they contain a text layer.
Are my files uploaded?
No, comparison happens in your browser.