Compare PDFs Free — Side-by-Side View
View two PDF files side-by-side with sync-scroll to spot differences. Perfect for contract review.
PDF 1 (Original)
PDF 2 (Modified)
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About Compare PDFs
Spotting differences between two versions of a document by eye is error-prone. ILikePdf Compare PDFs opens both files side by side with synced scrolling, so matching pages move together as you review. Difference highlighting draws attention to changed regions across the pages. Both documents are processed locally in your browser, making the comparison fast, accurate, and completely private.
How to compare two PDFs Compare PDFs
Common use cases for Compare PDFs
- Verify that a revised contract matches the original except for changes.
- Check which pages differ between two versions of a report.
- Review edits made by colleagues to shared documents.
- Confirm a final PDF matches its approved draft.
Pro tips
- Synced scrolling makes page-by-page review effortless.
- The comparison runs locally — documents never leave your device.
- Start by comparing first pages to quickly spot version mismatches.
Frequently Asked Questions
Yes. Upload two PDFs and see a side-by-side diff of differences — added, removed, and changed text highlighted. Free, no upload, no watermark.
Text additions (green highlight), deletions (red strikethrough), modifications, and layout changes. Images are compared visually for differences.
Yes. For scanned PDFs, OCR runs first on both documents before comparison. The diff shows text differences, not pixel-level image comparisons.
Yes. PDF comparison runs entirely in your browser via WebAssembly. Your documents never leave your device.
View the diff side-by-side in your browser, download a merged PDF with change tracking marks, or export a text-based diff report.