Compare PDFs
Compare two PDF documents. Highlight differences between versions.
First PDF (Original)
Upload First PDF
Second PDF (Modified)
Upload Second PDF
About This Tool
Compare PDFs is a powerful tool for visual document comparison. It analyzes two PDF files and highlights the differences between them, making it easy to spot changes in text, formatting, or layout.
You can choose between "Side-by-Side" view to see pages next to each other, or "Overlay" mode to see changes superimposed (often acting like a "light box"). Detected differences are highlighted in color so you don't miss a thing.
All comparison happens locally in your browser. This is crucial for comparing sensitive contracts or legal documents, as they never leave your computer.
How to Use
Upload Two PDFs
Upload the "Original" version and the "Modified" version you want to compare.
Choose View Mode
Select "Side-by-Side" for parallel reading or "Overlay" to visually spot layout shifts and text changes.
Analyze & Export
Review the highlighted differences on screen. You can also download a summary report of the changes.
Use Cases
Contract Review
Instantly spot redlines or unauthorized changes between two versions of a contract.
Design Proofing
Compare an original design file with a printer proof to ensure no elements have shifted or disappeared.
Software Testing
Compare generated PDF reports from different software versions to verify identical output.
Frequently Asked Questions
Does it compare text content?
Yes, it detects changes in text content as well as visual layout changes.
What do the colors mean?
Typically, red indicates deleted or changed content from the original, while green indicates new content in the modified version.
Can I compare files with different page counts?
Yes, but the comparison works best page-by-page. Extra pages will be shown as completely new/added content.
Is it accurate for scanned docs?
For scans, it uses visual comparison. It works well if the scans are aligned, but significant skewing might show false positives.