FileopiaCompare two PDFs
Compare two PDF versions and highlight added, removed and changed text side by side. Free, private, no upload.
- Upload
- Options
- Download
- ✓ 100% free
- ✓ No sign-up
- ✓ No limits
- 🔒 Files never leave your device
How to: Compare PDF
- Select the two PDF versions.
- Click Start.
- Review the highlighted differences or download the report.
Contract revisions, policy updates and new document versions often arrive without tracked changes. Compare PDF shows exactly which words were added, deleted or changed between two versions, so nothing slips through.
Common uses
- Check what changed between two versions of a contract.
- Review edits to terms and conditions or policies.
- Verify that a final print file matches the approved proof.
Tips for best results
- Put the older version first so additions and removals read naturally.
- Scanned PDFs need OCR before their text can be compared.
When to compare PDFs
Use Compare PDF whenever you receive a “final” version of a contract, policy, specification or academic paper. Small changes in numbers, dates or liability clauses are easy to miss when reading.
Reading the results
Removed text is marked in one colour and added text in another, side by side, so you can review each change and ask about anything unexpected before signing.
Why use Fileopia for Compare PDF?
| Fileopia | Typical upload-based sites | |
|---|---|---|
| Files uploaded to a server | No – processed on your device | Yes |
| Sign-up required | Never | Often for bigger jobs |
| Hourly / daily task limits | None | Common on free plans |
| Watermark on output | Never | Sometimes |
| Works offline after loading | Yes, for most tools | No |
Your files never leave your device
Compare PDF runs entirely in your browser using JavaScript and WebAssembly. Your files are read from your disk into this tab, processed in memory and saved straight back to your downloads folder – they are never uploaded to Fileopia or any third party.
- Test it yourself: once this page has loaded, switch off Wi‑Fi or mobile data and run the tool – it keeps working.
- Check the network: open your browser’s developer tools (F12 → Network) while processing; you will see no file upload requests.
- Nothing to delete: close the tab and the data is gone – there is no server copy, no retention period and no account.
Frequently asked questions
Does it compare images?
This version compares text. Visual comparison is planned.
Does it compare images and layout?
This version compares text. Visual comparison is planned.
Is Compare PDF really free?
Yes. Every tool on Fileopia is 100% free with no file limits, no sign-up and no watermarks. The site is supported by unobtrusive ads.
Are my files uploaded to a server?
No. Fileopia processes your files directly in your browser using JavaScript. Your documents never leave your device, so they stay completely private.
Does it work on mobile?
Yes. Fileopia works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux.