Compare PDFs
Compare two PDF versions side by side or as an overlay, with differences highlighted so you can see exactly what changed.
First PDF (Original)
Upload First PDF
Second PDF (Modified)
Upload Second PDF
About This Tool
Someone returns a contract saying they made a couple of small changes. Reading 30 pages twice to find them is slow, and the change that matters is exactly the one you will skim past.
This compares two versions and highlights what differs. Side-by-side view puts the documents next to each other with changes marked on both. Overlay view stacks them so shifted text and moved elements become immediately visible - which side-by-side reading tends to hide.
Both text and visual differences are picked up, so an amended clause and a swapped logo are both caught. Everything is compared locally, which matters when the two versions are drafts of something confidential.
How to Use
Load both versions
Add the original and the revised document.
Choose a view
Side by side for reading, overlay for spotting moved or shifted content.
Work through the differences
Changes are highlighted and can be stepped through page by page.
Export the comparison
Save a marked-up PDF as a record of what changed.
Use Cases
Contract redlines
Find the two clauses that were quietly amended in a returned draft.
Version control
Confirm what actually changed between revision 4 and revision 5.
Proof checking
Verify a corrected proof contains only the corrections that were requested.
Frequently Asked Questions
Which view should I use?
Side by side to read the changes. Overlay to catch content that moved or shifted, which side-by-side reading often misses.
Does it detect image changes?
Yes. Visual differences are compared as well as text, so a replaced image or logo is flagged.
Can I compare scanned documents?
Visual comparison works. Text comparison needs a text layer, so OCR both files first for that.
Are my documents uploaded?
No. Both files are compared in your browser.