Compare PDF Online (Find Differences in Two PDFs)

Compare two PDF files and highlight every change. Upload File A and File B, choose text or visual compare, then download a marked PDF or a summary report. Fast, accurate, secure, and no sign up required with PDFJenny.

How to Compare PDF Files (Online)

Upload both PDFs to PDFJenny, select Text Compare or Visual Compare, and set options such as page range and items to ignore. Click Compare PDF to see side by side highlights. Export an annotated PDF with changes or a CSV/TXT summary of differences.

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Up to 100MB for PDF

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Use final versions

Pick the approved drafts for File A and File B. Remove tracked edits in Word before exporting to PDF so the comparison reflects real changes only.

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Unlock and flatten

If a PDF is protected, unlock it first. Flatten comments and form fields when you want only content differences, not annotation noise.

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Align page order

Ensure both PDFs follow the same section order. Rename or reorder pages if needed so the compare pairs the right pages together.

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Enable OCR for scans

Turn on OCR for scanned PDFs so Text Compare can read words, not just images. This improves detection of insertions and deletions.

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Choose ignore rules

Ignore dates, extra spaces, case changes or page numbers if they are not meaningful. Set a tolerance for small image shifts in Visual Compare.

Features of PDFJenny’s Compare PDF Tool

Compare PDF files online with text and visual modes, OCR for scans, and powerful ignore rules. Review changes side by side or in overlay, then export a highlighted PDF or change list. Fast, private, and no sign-up required.

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Accurate text comparison with OCR

Detect insertions, deletions and replacements across headings, tables and body text. OCR converts scans into searchable text so differences are identified precisely.

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Visual compare for layout and graphics

Catch layout shifts, image swaps and design edits instantly. Overlay or side-by-side view highlights where visual elements changed.

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Side by side viewer & overlay mode

Review changes with synced dual panes or a single overlay. Zoom in for details and navigate differences with next/previous controls.

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Flexible ignore & match settings

Ignore spacing, case, dates, page numbers and line breaks. Set pixel/colour thresholds in visual mode to reduce false positives.

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Page range & alignment control

Compare the whole file or selected pages. Auto-align mismatched documents when sections are added or removed.

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Export marked PDFs & change lists

Download highlighted PDFs or export a CSV/TXT report listing each change by page, type and snippet.

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Batch compare & secure processing

Queue multiple PDF pairs and compare in one session. Files are transferred via HTTPS and auto-deleted—no sign up, no watermark.

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Practical ways to use Compare PDF

Use PDFJenny to compare PDF online when you need to verify changes between versions.
Spot edits and layout shifts, review side by side, then export a marked PDF or change list for quick approvals.

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Contract redlines

Confirm wording updates between versions and ensure no clauses changed before signing.

Policy updates

Show exactly what changed for audit, compliance, and approval workflows.

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Technical manuals

Check edits in steps, warnings, diagrams, or engineering notes.

Marketing brochures

Verify layout, image updates, branding shifts, or pricing changes between print runs.

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Financial statements

Compare figures, tables, and footnotes across reporting cycles.

Academic submissions

Track revisions in chapters, citations, and formatting between drafts.

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Product specifications

Detect changes in tables, dimensions, drawings, and manufacturing details.

Legal bundles

Ensure exhibits, statements, and annexures match the latest approved version.

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Translations

Confirm alignment, structure, and paragraph flow across multilingual versions.

Frequently asked questions

Upload File A and File B, choose Text or Visual mode, set options, then click Compare PDF. Review highlights and export a marked file or summary.

Yes. Text Compare finds insertions, deletions and replacements. Turn on OCR for scanned PDFs.

Use Visual Compare to highlight moved elements, new images, spacing shifts and colour changes.

Enable OCR so the tool reads text. You can still use Visual Compare for page image differences.

Yes. Use ignore rules for dates, numbers, whitespace and case to reduce noise.

Yes. Set a page range or re-align pages where sections were added or removed.

An annotated PDF with highlights or a CSV/TXT change list with page references.

Yes. Compare PDFs in your browser on phone, tablet or desktop.

Files move over HTTPS and are removed automatically after processing. Only you can access them.

Up to 100 MB per PDF. For very large files, compare by sections or compress first.
FAQs

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