Compare PDF Files Online — Side-by-Side & Overlay Comparison

Visually compare two PDF versions to spot changes, additions, or deletions. Use synchronized scrolling or overlay mode with adjustable opacity.

First PDF

Click or drop

Second PDF

Click or drop

How to Compare PDF Files

1

Upload Both PDFs

Select the two PDF files you want to compare. They will be loaded locally in your browser.

2

Choose View Mode

Select 'Side-by-Side' for a parallel view or 'Overlay' to see one page on top of the other.

3

Analyze Differences

Use synchronized scrolling, adjust overlay opacity, or use the 'Flicker' tool to highlight visual changes.

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Frequently Asked Questions

How does the PDF comparison tool work?

Our tool renders both PDF files using your browser's processing power. You can then view them side-by-side or overlay them to visually identify differences in text, layout, or graphics.

What is Overlay mode?

Overlay mode stacks one PDF on top of another. By adjusting the opacity slider or using the Flicker button, you can easily see what has changed between two versions of a document.

Is the comparison done securely?

Yes! All processing happens entirely in your web browser. Your files never leave your device, ensuring total privacy for sensitive documents.

Can I compare documents with different page counts?

Yes, you can browse through pages of both documents. If one document is longer, you can still compare the overlapping pages easily.