Compare PDF Files Online Free

Side-by-side comparison of two PDF documents

Document A (Original)

Drop Original PDF (Version 1)

Select the first document version

Up to 150.00 MB per file • Single file

Processed 100% locally in your browser. Your files never leave your device.

Document B (Revised)

Drop Revised PDF (Version 2)

Select the second document version

Up to 150.00 MB per file • Single file

Processed 100% locally in your browser. Your files never leave your device.

Processed 100% locally in your browser

Your files never leave your device. Zero server uploads.

How It Works

Upload First PDF

Select the original or first version of your PDF document.

Upload Second PDF

Select the modified or second version to compare against.

Compare

View the documents side by side with differences highlighted.

Frequently Asked Questions

Quick answers about this tool

What types of differences are detected?▼

Visual differences are highlighted showing changes between the two documents.

Can I compare PDFs with different page counts?▼

Yes, the tool will show all pages from both documents for comparison.

Does it work with scanned PDFs?▼

Yes, the visual comparison works with all PDF types including scanned documents.

Can I download a comparison report?▼

You can view differences on screen. Report download may be added in future updates.

About This Tool

Compare two PDF documents with our free PDF comparison tool. Identify differences between PDF versions, contracts, or documents instantly with visual side-by-side comparison. Our PDF diff tool highlights changes, additions, and deletions between documents. Perfect for comparing contract versions, reviewing document revisions, or verifying PDF accuracy. Navigate page by page to spot every difference. The browser-based comparator processes files locally – your documents never leave your device.

Why Choose AeroPDF?

100% Private

Processed entirely in your browser with no cloud uploads.

Instant Speed

No waiting for slow server roundtrips or queues.

Any Device

Works smoothly on Windows, Mac, iOS, and Android.

Key Features

Side-by-side visual comparison

Highlights differences between versions

Page-by-page navigation

Text and visual diff modes

Secure browser-based processing

Step-by-Step Tutorial & Security Guide

How to Compare Two PDF Files Side-by-Side to Find Differences

Read Guide

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