Comparing PDFs
Got two versions of a document and need to see what changed? Contract drafts, report revisions, updated manuals - manually comparing page by page sucks and you miss stuff. This automates it by analyzing both PDFs and highlighting all differences.
Upload
Upload two PDFs - original and modified version. Click upload areas to select. Shows page count and size for each.
Comparison Method
Pick how to view:
- Side by Side: Both docs simultaneously for visual check
- Overlay: One superimposed over the other with adjustable transparency
- Difference Highlight: Only shows changes highlighted in color
Start Comparing
Click "Compare PDFs". Tool examines page by page looking for:
- Text changes - added, deleted, modified
- Layout differences - moved elements, changed formatting
- Content variations - different images, missing pages
In-browser. Docs never upload anywhere.
Results
After analysis, see:
- Pages compared
- Differences found
- Similarity percentage
- List of pages with changes
Side-by-side view with color-coded highlighting showing exactly what differs.
Navigation
Controls let you:
- Scroll through all pages
- Jump directly to pages with differences
- Zoom in/out for detail
- Toggle display modes
Understanding Highlights
In difference mode, changes show highlighted:
- Added: New text or images highlighted
- Removed: Missing stuff shows as gaps
- Modified: Changed text or graphics highlighted
Adjust sensitivity if you need to catch subtle changes or ignore minor formatting stuff.
Export
After reviewing:
- Export report as JSON with all differences listed
- Share findings with colleagues
- Document what changed between versions
Uses
Good for:
- Legal: Compare contract versions for unauthorized changes
- Writers/Editors: Track edits between drafts
- QA Teams: Check consistency across releases
- Business: Monitor policy updates
- Academic: Compare paper revisions
Tips
For best results:
- Use same PDF format for both when possible
- Adjust sensitivity based on what you're looking for
- For text-heavy docs, use higher sensitivity
- For layout checks, use overlay mode
- Save settings for consistent results
Looks at both visual appearance and text content. Saves hours of manual work and makes sure no changes get missed.