Compare two PDFs by text

Choose an original and a revised PDF. The tool extracts the text of each page, aligns lines and highlights what was added or removed – ideal for contracts and manuscripts where wording changes matter.

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How to use Compare PDFs

Choose the original PDF.
Choose the revised PDF.
Press Compare.
Review additions (green) and removals (red); filter to changes only.

Supported formats

Input: PDF × 2 (with selectable text)
Output: On-screen diff

What it compares

Text content, line by line, over the whole document (page breaks are ignored so that moving a paragraph across a page boundary is not reported as a rewrite).

What it does not compare

Fonts, colours, images, layout and formatting. Two PDFs that look different but contain the same text will be reported as identical.

Privacy

Files you choose are read into your browser’s memory and processed on your device; they are not uploaded to a server. Temporary download links are released after use, and the offline cache never stores your documents. More about privacy and limits.

Frequently asked questions

Does it work on scanned PDFs?

Only after OCR on both files.

Why do small reflow differences show up?

Lines are compared as printed. If line breaks moved, nearby lines can appear as changed.