Compare PDF Online Free – Find Differences Between Two PDFs

Compare PDF

Upload two PDFs to see what changed between them.

How to do

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3 quick steps to compare two PDFs.

1

Upload two PDFs

Drop your original PDF into the first box and the version you want to compare it against into the second. Both files stay on your device the whole time.

2

Click Compare PDFs

AziPDF extracts the text from both documents and compares them line by line, spotting every addition and deletion between the two versions.

3

Review the differences

See both PDFs side by side, with removed text highlighted in red and added text highlighted in green, plus a running count of exactly how many lines changed.

FAQs

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Answers about comparing PDFs securely.

Yes. Both PDF files are processed securely in your browser to compare differences. Your documents are not uploaded to our servers, helping keep your files private.
Talk with the AziPDF AI Voice Assistant using voice or text commands. Simply describe your task, and the AI can merge, split, compress, convert, edit, rotate, and chat with PDFs for you.
Upload two PDF files and AziPDF compares their text to identify added, removed, and modified content, making document changes easy to review.
Yes. Compare older and newer versions of a PDF to quickly identify changes, revisions, and updated content.
No. AziPDF only analyzes your PDF files to find differences. Your original documents remain unchanged.
There are no fixed file size or page limits. Very large PDFs may take longer to compare depending on your browser and device.
Yes. Text-based PDFs provide the best results. Scanned PDFs may require OCR before their content can be compared accurately.
Yes. AziPDF compares text content directly, regardless of how the pages are organized in each file.
Yes. Comparing PDFs only analyzes document content to identify differences. Your original PDF files and formatting remain unchanged.
Yes. AziPDF works on phones, tablets, and desktops directly from the browser.