Compare PDF
To compare two PDFs, upload both files and view them side by side with synchronised scrolling to spot revisions page by page. Both documents are rendered entirely in your browser, so neither is uploaded. The side-by-side view works best on a tablet or desktop screen.
Compare two PDF documents side-by-side in a clean workspace.
Last updated
Drop two PDF files here, or click below to upload both.
Runs in your browser · file never uploaded
This tool runs entirely in your browser using WebAssembly. Your file is never uploaded — it stays on your device from start to finish.
Full detail in our privacy policy.
At a glance
0 KB
Uploaded to any server
2 files
Side-by-side review
Fast
Visual comparison setup
Start in 3 easy steps
A quick visual tour of the private PurePDF workflow.
Upload two PDFs
Choose the original and modified files together.
Open comparison
Load both previews into the workspace.
Review changes
Scroll through pages to compare content visually.
Built for everyday PDF work
Fast, clear, and built around local browser processing.
Side-by-side view
Load two documents and compare pages visually.
Private review
Documents stay in your browser session.
Clear preview
Scrollable page previews help you spot differences.
Try our complete PDF toolkit
Every PurePDF tool, organized by what you need to do.
Frequently
Asked
Questions
Quick answers about this PurePDF workflow.
Is the PDF compare tool free?
Yes. Comparing two PDFs side by side is completely free.
Do my files get uploaded to a server?
No. Both documents are rendered and compared entirely in your browser.
How does PDF comparison work?
Upload two PDFs and view them side by side with synchronized scrolling to spot differences page by page.
Can I compare different versions of a contract?
Yes. Side-by-side view makes it easy to review revisions between draft versions of contracts, reports, or manuscripts.
Is there a file size limit?
No limit set by us — both documents are rendered on your device, so available memory is the practical ceiling.
Can I compare PDFs on mobile?
Yes, though the side-by-side view works best on a tablet or desktop screen.