Compare PDFs
Highlight and display differences between two PDF documents
Original PDF
Modified PDF
Comparison Settings
Need to find what changed between two versions of a PDF? iReadPDF's comparison tool highlights every difference between two documents—added text, deleted content, and modifications. Perfect for contract review, version tracking, and document auditing.
Our visual comparison shows changes side-by-side with clear highlighting: green for additions, red for deletions, and yellow for modifications. Compare text, layout, and even images to ensure you catch every change.
Why Use Our Compare PDFs Online for Free?
Who Uses This Tool?
Trusted by professionals across industries for their daily document needs
Contract Review
Compare contract versions. Find clause changes. Review amendments carefully.
Legal Documents
Track document revisions. Identify modifications. Audit legal changes.
Version Control
Compare document versions. Track changes over time. Maintain version history.
Quality Assurance
Verify document accuracy. Compare against templates. Quality control review.
Collaboration
Review collaborator changes. Track team edits. Merge contributions.
Compliance
Compare against standards. Verify compliance changes. Audit modifications.
How It Works
Get started in three simple steps
Upload Both PDFs
Upload the original document and the modified version to compare.
Automatic Comparison
Our tool analyzes both documents and identifies all differences.
Review Changes
View highlighted differences side-by-side. Navigate between changes easily.
Powerful Features
Everything you need, nothing you don't
Text Comparison
Word-by-word and character-by-character text difference detection.
Visual Highlighting
Clear color coding: green for additions, red for deletions.
Side-by-Side View
See both documents together with aligned pages.
Change Navigation
Jump between differences with next/previous buttons.
Summary Report
Overview of all changes found with statistics.
Export Results
Download comparison report or marked-up PDF.
Frequently Asked Questions
Quick answers to common questions
What types of changes are detected?
Text additions, deletions, and modifications. Also layout changes, image differences, and structural changes.
Can I compare scanned PDFs?
Yes, OCR is applied to scanned documents to extract text for comparison. Results depend on scan quality.
What if pages don't match up?
Our tool aligns pages intelligently. If documents have different page counts, it will identify inserted or deleted pages.
Can I export the comparison?
Yes, download a comparison report or a marked-up PDF showing all differences.
Does it compare formatting changes?
Primarily focuses on text content. Font and formatting changes are noted but emphasis is on content differences.
How are images compared?
Images are compared visually to detect additions, removals, or modifications. Exact pixel differences are highlighted.
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