Compare Two PDFs — Free & Private
Spot exactly what changed between two versions of a document. Differences are highlighted in red, page by page — everything runs locally in your browser.
Original PDF
Drop the original PDF here
or select a file
Modified PDF
Drop the modified PDF here
or select a file
How It Works
Compare two versions of a document in three simple steps.
Upload both PDFs
Choose the original file and the modified file you want to compare it against.
Run the comparison
PDFHome renders matching pages from both files and highlights exactly which areas differ.
Review the differences
Scroll through each page — changed areas are highlighted in red, unchanged pages are marked identical.
Why Use PDFHome?
A fast visual check before signing off on a revised document.
100% private by design
Both files are rendered and compared entirely in your browser — nothing is uploaded to a server.
Visual, page-by-page results
See precisely which regions changed, rather than just a generic "files differ" message.
Works for any visual change
Catches changes to text, images, layout or formatting — anything that changes how a page looks.
Handles different page counts
If one file has more pages than the other, PDFHome compares as many matching pages as it can and reports the mismatch.
Free, no account required
Compare PDF is completely free with no sign-up.
Frequently Asked Questions
PDFHome renders each corresponding page of both PDFs as an image and compares them pixel by pixel, highlighting any areas that differ in red. It's a visual comparison, so it catches any change that affects how a page looks — text, images or layout.
PDFHome compares up to the smaller of the two page counts and clearly reports the page count mismatch, so you know pages beyond that point weren't compared.
Pages with different dimensions can't be pixel-aligned, so PDFHome flags that page as having a different size instead of attempting a diff.
No — this is a visual comparison based on rendered pixels, not a text-level diff. Two pages with identical text but different fonts or spacing would still be flagged as different.
Yes. Both files are processed entirely on your own device in your browser — neither is transmitted over the internet.