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Compare PDF files

Compare two PDF revisions side-by-side with visual diff overlays and textual change tracking.

or drop PDFs here
100% In-Browser & Zero-Upload Privacy
Instant High-Performance Processing
Max 60 MB • Free Forever
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How to Compare PDF Online for Free

Follow these quick, easy steps to process your files securely inside your web browser.

Step 1

Select Both Documents

Upload the original PDF and the revised version.

Step 2

Run Comparison

Our engine aligns pages and detects modified coordinates.

Step 3

Inspect Differences

Review visual color highlights and textual diff reports.

Step 4

Export Report

Download the detailed comparison summary.

Why Use BizAiPro Compare PDF?

Dual file comparison: Original vs Modified revision
Visual difference heatmap overlay highlighting pixel changes
Textual difference extraction revealing inserted and deleted words
Synchronized side-by-side page scrolling

Frequently Asked Questions about Compare PDF

Does this highlight changed words or only visual shifts?

Both! You can toggle between a visual pixel overlay and an exact textual word-by-word diff.

Are my files and documents uploaded to any server?

No. BizAiPro processes your documents 100% locally in your web browser using client-side WebAssembly and modern JavaScript. Your files never leave your computer.