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Compare two PDFs — free
See what changed between two versions of a document. Real PDF Editor compares the text of two PDFs and highlights the differences side by side — free, in your browser, with nothing uploaded.
100% free · no sign-up · files never leave your device
See exactly what changed, side by side
The compare tool runs a line-by-line text diff and shows the two versions next to each other, highlighting what was added, removed, or changed on each page. It's the quick way to catch edits between two drafts of a contract or report without reading both end to end.
Compare PDFs free, in your browser, without Adobe
No Adobe Acrobat “Compare Files” subscription needed. Both documents are read and compared in your browser, so nothing is uploaded — and it works the same on a Mac, a Windows PC, or a phone, for free.
How it works
- 1
Open the first PDF
Launch the editor and open one of the documents you want to compare.
- 2
Open Compare
Go to Tools → Compare and choose the second PDF.
- 3
Review the differences
Added, removed, and changed lines are highlighted side by side, page by page.
- 4
Act on the changes
Use the diff to confirm edits, then continue editing or close.
Why use Real PDF Editor
- Side-by-side text difference view
- Highlights added, removed, and changed lines
- Free with no account or watermark
- Both files stay in your browser
Frequently asked
How do I compare two PDF files?
Open the first PDF in Real PDF Editor, go to Tools → Compare, choose the second file, and the text differences are shown side by side, page by page.
How do I compare two PDFs for differences?
The Compare tool runs a text diff and highlights what was added, removed, or changed between the two documents.
Can I compare two PDFs side by side?
Yes. The result is shown as a side-by-side, page-by-page view with the differences highlighted.
Can I compare a PDF to a Word document?
The tool compares two PDFs. To compare against a Word file, convert it to PDF first with the Word → PDF tool, then run Compare.
Is comparing PDFs free?
Yes — it's free with no watermark and no account required.
Are my PDFs uploaded when I compare them?
No. Both files are read and compared in your browser, so nothing is sent to a server.