Compare PDFs

The words of each page against the same page of the other file: what was removed is struck through in red, what was added is green, with a few words of context around each change. In visual mode the pages are also compared as pictures, so a moved logo, a redrawn chart or a change in a scan without a text layer shows up as a boxed area. Everything runs in your browser - the two files are never uploaded.

A report PDF: a summary, then every changed page with its removed and added words and, in visual mode, the two pages side by side with the changed areas boxed. On screen the changed pages are marked in the preview and the differences view lists the word changes.

The first one in the list. Drag the rows or press "Swap the two" to turn them round - the report says which is which.

Text mode needs a text layer - run a scan through OCR first, or use visual mode, which compares the page images directly. Pages are paired by number; if a page was inserted, everything after it will show as changed.

Text mode is the quick one: only the words are read, so even a long document is a matter of seconds. Visual mode renders both copies of every page as well, which takes noticeably longer - use it when a picture, a chart or a scan is what changed. Both run on your machine, so the speed is your computer's.

Convert the Word file here first - Word to PDF takes a .docx - and then compare the two PDFs. The same goes for Excel and PowerPoint; everything stays on your device at every step.