Compare PDFs Online
Upload two PDF documents and see exactly what changed between them. Compare contracts, proposals, reports, and any document revision with a visual side-by-side viewer that highlights every difference.
Catch edits, additions, removals, and formatting changes instantly — no manual reading required.
Loading PDF Compare...
How It Works
Upload the original document and the modified version. Each PDF is rendered page by page for comparison.
Switch between Side by Side, Overlay, and Differences view. Each mode shows changes in a different way to help you review edits.
Navigate through pages, see difference percentages, and download a summary report showing what changed on each page.
Why Compare PDFs?
When you receive a revised contract, updated report, or edited proposal, you need to know exactly what changed. Reading through the entire document manually is slow and error-prone.
PDF Compare shows you every difference at a glance — changed text, moved elements, added or removed content — so you can review revisions confidently and catch unexpected edits before signing or approving.
Common Use Cases
Contract Revisions
Compare original and revised contracts to catch changes in terms, pricing, dates, and legal language. Make sure nothing was added or removed without your knowledge before signing.
Report Updates
Compare different versions of financial reports, project updates, or compliance documents. See which data points, charts, or sections changed between drafts.
Design and Layout Review
Compare PDF proofs, brochures, or marketing materials to check for layout shifts, font changes, image swaps, and other visual differences between revisions.
Legal and Compliance Documents
Review policy updates, regulatory filings, and legal agreements to ensure only authorized changes were made. The visual diff makes it easy to spot unauthorized edits.
Frequently Asked Questions
How does PDF Compare work?
Upload two PDFs — an original and a modified version. The tool renders each page and compares them pixel by pixel. Differences are highlighted in red so you can see exactly what changed.
What view modes are available?
Three view modes: Side by Side shows both documents next to each other, Overlay blends them with transparency, and Differences highlights changed areas in red against a dimmed background.
Can I compare PDFs with different page counts?
Yes. The tool compares pages that exist in both documents and marks extra pages as 100% different.
Does PDF Compare detect text changes?
PDF Compare performs a visual pixel-by-pixel comparison. It detects any visible change including text edits, moved elements, added or removed content, image changes, and formatting differences.
Is PDF Compare free?
PDF Compare is available as a Business plan feature for $13.99/month. It includes the comparison tool along with other Business tools.
Can I download a comparison report?
Yes. Click the Report button to download a text summary showing the difference percentage for each page, categorized as Identical, Minor changes, Moderate changes, or Major changes.
Never Miss a Change Again
Compare any two PDFs and see exactly what was added, removed, or modified. Review contract revisions, report updates, and document edits with confidence.
Start Comparing NowMore PDF Tools
PDF Redaction
Permanently remove sensitive text and data from PDFs.
eSign Documents
Add electronic signatures to PDFs.
Protect PDF
Add password protection to your documents.
Merge PDF
Combine multiple PDFs into one file.
Workflow Automation
Chain multiple PDF tools into one workflow.
Compress PDF
Reduce file size without losing quality.
Split PDF
Divide a PDF into separate files.
PDF to JPG
Convert PDF pages to JPG images.