How to compare pdf files online
- Choose two PDF documents to compare.
- Review the available settings and start local processing.
- Review the result and download the .txt file.
Compare PDF files
Compare two PDFs page by page in your browser and download a visual difference report.
or drop the file here
Up to 50 MiB per PDF
Up to 100 pages
Files remain in your browser
No file upload
No account required
Browser processing questions
Is my file uploaded?
No. Input files and generated results remain in this browser.
Do I need to install software?
No. The tool runs from the deployed website in a modern browser.
Will every document convert perfectly?
The comparison checks rendered page appearance. It does not determine legal or semantic equivalence.
Need another document task? Browse all working tools.
About this tool
See visible differences between two PDF versions
Compare PDF renders matching page positions and measures visual pixel differences. It helps locate layout, image, or visible text changes between versions.
Useful for
- Check whether a revised PDF changed visually.
- Identify pages with the largest visible difference.
- Review before-and-after versions without uploading them.
Good to know
- This is a visual comparison, not a semantic or legal analysis.
- Font rendering and page-size differences can affect the score.
- Changed meaning with an identical appearance may not be detected.