How to Compare Two PDF Files Online for Free
When contracts, reports, or policies have similar filenames, a page-by-page comparison helps reveal changed, added, or removed text without reading both documents side by side.
Compare two PDF filesCompare two PDFs in three steps
Text comparison runs in your browser and does not require an account.
- 1.Open Compare PDF and add the original document.
- 2.Add the revised document and start the comparison.
- 3.Review the highlighted differences page by page.
What the comparison detects
The tool compares readable text extracted from matching pages. It is useful for wording, number, and paragraph changes, but it is not a pixel-perfect visual proofing system.
Scanned documents may need OCR
A scanned PDF can contain page images instead of selectable text. Run OCR first when the comparison cannot find text in a scan.
Frequently asked questions
Does PDF comparison upload my files?
No. The comparison runs locally in your browser.
Can it compare scanned PDFs?
Run OCR on scanned files first so their text can be recognized and compared.