Compare PDFs
Compare two PDF documents for differences in content and structure.
Drag & drop files here, or click to select
Drag & drop files here, or click to select
Use Cases:
- Version control and document tracking
- Content verification and validation
- Quality assurance for PDF documents
- Legal document comparison
How to Compare Two PDF Documents Online
Upload your first PDF document in the designated left slot.
Upload your second PDF document in the designated right slot.
Choose the comparison view (e.g. side-by-side or overlay highlights).
Review the detected changes in text and layout directly on the screen.
Why Compare PDFs with SonuPDF?
Local File Security
All document comparisons run entirely within your local browser. Your confidential files are never uploaded to remote servers.
Highlight Differences
Spot text additions, removals, and formatting changes clearly with colored markup overlays.
Side-by-Side Viewing
Synchronize scrolling between both documents to inspect discrepancies in layout and structure easily.
No File Size Restrictions
Compare documents of varying lengths and sizes without worrying about remote platform limits.
Frequently Asked Questions
No, SonuPDF performs all comparisons directly inside your local web browser, ensuring complete privacy.
The tool highlights text and layout differences. For scanned documents, it is recommended to run OCR before comparing text structures.
It displays both files next to each other and synchronizes your scrolling so you can inspect matching sections at the same time.
Currently, you can compare two standard PDF files.