Processed on your device
Files are not uploaded to CookPDF servers
The main operation runs in the browser on your device.
Session can be restored
The browser can save a cache and local draft to continue your latest work.
Check before using
Review the resulting file, especially for documents that need to be signed, printed, or sent officially.
How to compare PDFs
Follow three steps and check the result before downloading.
Choose two versions
Open the original file and the file to compare against.
Run the comparison
Let the tool analyze the pages and mark areas with changes.
Check the result
Browse each difference and cross-check the two documents.
Highlights
Useful capabilities for the right task on PDF documents.
Compare page by page
Track changes in the same position between two versions.
Visual highlighting
Focus on the areas that may have changed.
Reduce manual checking
Quickly narrow down areas before reading the details again.
Keep control of the conclusion
The results support your review; you are the one who confirms the actual changes.
Use cases
Common situations well suited to this tool.
Review a new contract version
Narrow down the content that changed between two drafts.
Review re-exported documents
Detect layout or content shifts after conversion.
Check periodic reports
Compare the versions before and after an update.
Ready to compare PDFs?
Choose your PDF files to get started and check the result right in your browser.
Compare two PDF files to find differences
Place two PDF versions side by side, scan for visual changes, and check each difference before drawing a conclusion.
When is this tool a good fit?
- Reviewing a new contract version: Narrow down the content that changed between two drafts.
- Reviewing re-exported documents: Detect layout or content shifts after conversion.
- Checking periodic reports: Compare the versions before and after an update.
The recommended workflow
Open the files, set up the task in the preview, check each affected page, and only then download. Keep the original so you can cross-check or start over when needed.
Limits to know
Differences in fonts, scanned images, alignment, or how the PDF was created can produce signs of change even when the readable content is similar. Always manually check the important points.
Data and your work session
The main operations run on your device and files are not uploaded to CookPDF servers. Your browser may store a cache or local drafts to restore the session; you can clear the session in the interface or clear website data in your browser settings.
Frequently asked questions
Answers about capabilities, limits, and how files are handled.
Do the comparison results replace re-reading the document?
Can two files with different layouts be compared?
Do scanned PDFs give the same results as PDFs with a text layer?
Can I resume my most recent session?
Ready to compare PDFs?
Choose your PDF files to get started and check the result right in your browser.