Compare PDFs
Compare PDFs online to find text, layout, and version differences. Review contracts, reports, and revised documents side by side.
What this tool is best for
Use Compare PDFs when two document versions need to be checked for changes before approval, signing, publishing, filing, or client delivery.
Why people use it
- Targets version-review intent where users need differences, not conversion or editing.
- Works for contracts, reports, policies, proposals, drafts, and quality-control checks.
- Helps reviewers spot changed pages before deciding whether to sign, send, archive, or continue editing.
What to watch for
- Text comparison works best when both PDFs have usable text layers. For scanned documents, run <a href="/en/tools/ocr-pdf">OCR PDF</a> first.
- If users need to apply changes after comparison, route to <a href="/en/tools/edit-pdf">Edit PDF</a> or a focused workflow like <a href="/en/tools/find-and-redact">Find and Redact</a>.
Supported inputs
two PDF versions, contracts and reports, text-based or visually comparable documents
Common outputs
comparison view, highlighted differences, review-ready change report
About This Tool
Compare PDFs is for users who have two versions of a document and need to know what changed. That often happens with contracts, policy updates, financial reports, proposals, academic drafts, technical manuals, or client deliverables where small changes can matter before approval or signature.
The search intent is review-oriented. People searching “compare PDFs” want differences highlighted clearly so they can decide whether a revision is acceptable. The page should emphasize side-by-side review, changed text, added or removed content, and visual differences that are hard to spot by manually scrolling between files.
It should also route adjacent needs. If either file is scanned, OCR PDF may be needed before text comparison is reliable. If a difference must be corrected, Edit PDF is the broader workspace. If the review reveals sensitive text, Find and Redact is the safer next step.
For SEO, this page should stay focused on document version comparison, contract review, quality assurance, and catching changes before a PDF is approved or shared.
How to Use
Upload Two PDFs
Upload the original and modified PDF documents.
Compare Documents
View differences highlighted in side-by-side or overlay mode.
Export Results
Download a comparison report or annotated PDF.
Use Cases
Contract Review
Compare contract versions to identify changes.
Document Revision
Review edits between document versions.
Quality Assurance
Verify that only intended changes were made.
Frequently Asked Questions
What types of differences are detected?
Text additions, deletions, modifications, and formatting changes.
Can I compare scanned documents?
Scanned documents should be OCR processed first for text comparison.
Is visual comparison available?
Yes, overlay mode shows visual differences between pages.
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