Compare PDFs Side by Side
Upload two PDFs to view them side by side. Navigate pages independently and highlight similar text.
Upload Two PDF Files to Compare
📄 PDF 1
Click to upload first PDF
📄 PDF 2
Click to upload second PDF
How to Compare PDF Files Online
Step 1: Upload Files
Click the upload boxes to select your two PDF files.
Step 2: View Side by Side
Both PDFs open side by side. Navigate pages independently.
Step 3: Highlight Similar Text
Click "Highlight Similar Text" to see matching content highlighted in both PDFs.
Frequently Asked Questions
Q. How does the side-by-side comparison work?
Upload two PDF files and they will be rendered side by side. You can navigate each PDF's pages independently and use the "Highlight Similar Text" button to see matching text highlighted in green on both documents.
Q. Is OnlinePDFPro safe to use?
Yes! OnlinePDFPro processes all files directly in your browser. Your documents never leave your device and are never uploaded to any server.
Q. Does it work on mobile phones?
Yes! On mobile, the PDFs stack vertically for easy viewing. Works on Android, iPhone, tablets and desktops.