Compare two PDFs and see what changed

How it works

Drop the old version of a PDF and the new one. Both are read in your browser, their words are lined up in reading order, and everything that was removed or added is marked. You get three numbers — pages changed, words added, words removed — and, for every page with a change, the old page beside the new one: removed words struck through, added words underlined, with a line of context around each change. Nothing is uploaded, there is no account and no limit on pages.

When it helps

• A rent agreement, offer letter or loan document comes back "with small corrections" — check exactly which words moved before you sign.
• A college or exam notification is re-issued — see whether a date, fee or eligibility line changed.
• Two drafts of a report or tender — find the edits without reading both end to end.
• A bank or insurer sends revised terms — spot the new clauses.

Words, not pixels

The comparison is word by word, so a change in one figure ("45,000" to "50,000") shows up as exactly that one word, even when the lines around it reflow. A paragraph that moved to the next page is not counted as a change. Pictures, colours, fonts and layout are not compared — only the text.

The report

Download a plain text report that opens on any phone or computer: both file names, the three totals, and every change with a few words around it, the changed words in [square brackets]. It is easy to paste into an email or a WhatsApp message when you ask someone about a change. Hindi text comes through as Hindi.

Scans and locked files

A scanned PDF is a picture of a page, so there are no words to compare yet. The tool says which file is a scan and opens OCR PDF with that file loaded; compare the searchable PDF afterwards. A PDF with a password goes to Unlock PDF first, also on your device.

Very different files

When two files share little text, single words cannot always be matched; whole lines are marked instead, and the tool tells you so. The totals stay honest either way.

Privacy

Contracts and statements are exactly the files you should not upload to a stranger's server. Both PDFs are read and compared only on your device and are never sent to us or anyone else.