About the Compare PDF
Comparing versions is a routine control before anything gets signed. A contract comes back from the other side’s counsel, a supplier reissues terms, or a policy is recirculated after review, and somebody has to establish what actually changed between the copy you approved and the copy in front of you.
This tool renders both documents side by side, page for page, and lets you step through them together — so a moved clause, a changed figure or an inserted paragraph is visible in context. Both files are rendered in your browser, so two confidential drafts can be compared without either one being uploaded.
It's part of the PDF collection on Toolzy, a growing platform of 135+ free, privacy-first tools built for speed and a great experience on every device.
Also known as: diff, compare, versions, changes.
Why use the Compare PDF?
- No watermarks on your output
- Handles multi-page and large PDFs
- Keeps your original formatting and quality
- Works on Windows, Mac, Linux, Android and iPhone
When to use it
- Preparing documents for email or printing
- Combining scanned pages or invoices
- Reducing file size to meet upload limits
How to use the Compare PDF
- Open the Compare PDF. Open the Compare PDF on this page, there is nothing to install and no account needed.
- Add your input. Add your file by clicking the upload area or dragging it in. It is read on your device, not uploaded.
- Adjust options. Choose any options you need, the Compare PDF updates instantly.
- Get your result. Click the action button to download or copy your result. It is 100% free.