# Compare PDF files online in seconds

URL: https://pdf.net/compare-pdf
Description: Compare PDF files with side-by-side or overlay modes and use our free text comparison tool to track changes. Works right in your browser.

Upload two PDFs and compare text changes side by side or in an overlay view. Spot every added, deleted, and replaced line right in your browser.

## How to compare two PDF files

1. Upload your PDF files
2. Choose side-by-side text changes or overlay comparison view
3. Review all the highlighted differences between your PDF files

## FAQ

### Can I compare more than two files?

No, you cannot compare more than two files at once. If you have three PDFs, compare each pair separately, for example File A with File B, then File A with File C. Our visual PDF comparison tool makes it easy to compare files as often as you need.

### What file formats are supported?

This tool compares PDF files, Word documents (DOC, DOCX), PowerPoint files (PPT, PPTX), and Markdown files (MD). You can also compare images (PNG, JPG, HEIC, and HEIF) in the overlay view — they are converted to PDF before comparison.

### Is the PDF comparison tool free?

Yes. You can upload two documents and compare them for free. Downloading the edited file is what requires a subscription.

### Can I compare a PDF with a Word document?

Yes. Our diff checker helps you compare documents even if they are in different formats, for example a PDF against a Word document or a PowerPoint presentation. For text-based files, both the Text changes and the overlay views are available. If one of the files is an image, use the overlay view: text comparison needs a text layer, which images do not have.

### Can I compare a PDF with an image?

Yes. Use the overlay view: it compares your files pixel by pixel and shows every visual difference.

### Can I compare scanned PDFs?

Yes, in the overlay view. Scanned pages are compared pixel by pixel, so you can spot visual differences between two scans. Text comparison is not available for scans, as they do not contain a text layer.

### What types of changes can this PDF difference checker detect?

It detects added, deleted, and replaced text and helps you spot layout differences in overlay mode. As a reliable PDF revision tracker, it helps you catch every edit.

### Which browsers and devices are supported?

Chrome, Firefox, Edge, and Safari on desktops, laptops, tablets, and phones. You can compare PDF files anytime and anywhere.

### How do I view two different PDFs side by side?

Right after uploading your documents, you will see them in a side-by-side comparison view. This mode shows both documents next to each other with synchronized scrolling, so you can compare two PDF documents for differences line by line.

### Are my files safe?

Yes. Our PDF comparison tool uses encrypted connections to keep your files private.