SECURITY · FREE ONLINE TOOL
Compare PDF
Compare two PDFs visually and highlight changed pixels.
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.pdf · PDF · 50 MB per file
Document preview
LIVEA fresh start for your file
Choose a file to get started. It stays on your device.
Your files stay on your device.
A FEW SIMPLE STEPS
How to compare two PDF documents
- 01
Choose exactly two PDF files in the order you want to compare them.
- 02
Check your source document, then click Compare PDF to calculate visual differences.
- 03
Review the generated report in Document preview and download it.
Before you download
Choose exactly two PDFs. The downloadable report shows both pages with pixel differences highlighted; it is not a semantic text comparison.
Does PDF comparison identify rewritten sentences?
This tool compares rendered page pixels and highlights visual differences. It does not interpret sentence meaning or produce a semantic text change list. Layout shifts, image changes and different fonts can all produce highlights.
Is Compare PDF free?
Yes. There is no subscription, account or paid API key. Your browser processes the files on your device. Larger documents need more memory and time.
Where are my files processed?
In this tab. Selected document files are not sent to a conversion server. Closing the tab clears the working session; downloaded files remain on your device.