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Review a revised report
Compare an original with its updated version and jump from a text change to its location on the page.
A useful PDF task, made simple
Compare PDF.
Two versions. A clearer view of what changed.
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Original
No PDF selectedUpdated
No PDF selectedUse the page controls to inspect your document.
100%
Add both PDFs. The editor opens when the comparison is ready.
Add both PDFs to see visual changes.
Choose PDF
Choose PDF
One or both PDFs have no selectable text. Run PDF OCR on the scanned document, then compare the searchable PDFs.
Original → PDF OCRUpdated → PDF OCRYour comparison report is ready.
Download the report or go back to review the highlighted changes.
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Sent for temporary processing when you start.
PDF
How to compare two PDFs
- 01
Choose two PDFs
Add the original and updated versions. Replace either document or swap their order.
- 02
Review the differences
Review PDF Pages, Text Changes, and Visual Changes after the comparison finishes.
- 03
Download your report
Save a PDF, Word or HTML report with added and removed text clearly marked.
Compare PDF
Upload the Original and Updated PDFs and wait for automatic preparation. Review PDF pages, searchable Text changes and Visual changes in the editor. Difference, Overlay and Swipe reveal changes to rendered pages. Choose Generate report to open the download screen for a PDF, Word or HTML text report. Image-only PDFs open visual comparison; OCR is not included.
QUICK VIDEO TUTORIAL
How to compare two PDF files for text changes
Find what changed between two versions.
English narration
Watch the video
Practical ways to use this tool
Document review
Check wording changes
Use a PDF diff to locate changed words in contracts or policies, then review the source documents in context.
Students
Compare drafts before submission
Inspect additions and removals and save a comparison report to record the text revisions.
Features and controls
Compare an Original and an Updated PDF
Two clearly labeled document slots keep the comparison focused.
File roles and side-by-side navigation
Upload both PDFs together or choose one in each slot. Replace a file when needed, or Swap to reverse the comparison roles. Wait while the preparation dialog analyzes both documents. PDF pages, Text changes and Visual changes are ready when the editor opens; image-only documents use Visual changes only.
Review selectable-text changes
Search change groups and jump to the corresponding words on each page.
What counts as a change
The comparison finds word-level text differences and ignores whitespace-only changes. Ignore case can suppress differences caused only by capitalization. The changes tab provides counts, matching-text statistics, search, copy and previous/next navigation. The match percentage describes extracted words, not visual similarity between page images.
Export a readable change report
Choose PDF, Word or HTML with inline or side-by-side layout.
Report formats and review context
Choose PDF, Word or HTML and set report layout, paper, orientation, margins and RTL when appropriate. Report settings prepare an updated report automatically. Generate report opens the standard download screen; Back keeps the current review available. The report contains changed text with page references. Unusual font encodings, multi-column reading order and inaccurate OCR can affect text matching.
Compare scanned pages visually
Difference, Overlay and Swipe show changes even when there is no selectable text.
Visual comparison and OCR limits
Visual changes compares corresponding rendered pages, including images and layout. Difference highlights changed areas; Overlay combines both pages; Swipe reveals the Original and Updated versions with colored change outlines. Scan shifts and rendering differences can create false changes.
Image-only documents use visual comparison. The downloadable report requires selectable text; use PDF OCR first if you need a text report. Mixed documents can have pages without extracted words.
Supported files & processing
- Input
- Output
- PDF, DOCX, HTML
Exactly two PDFs, up to 25 MB and 750 pages each, with 50 MB combined. An input over either limit is rejected; it is not partially compared.
Processing uses our servers. Source files, temporary files and results are deleted from our servers within 30 minutes after processing finishes. We do not share document contents with third parties or use them to train AI models.
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FAQ
A few useful answers
Know what to expect before you start.
Temporary server processingCan I compare more than two PDFs at once?
Choose exactly two files: Original and Updated. Each file must be at most 25 MB and 750 pages. Choose the reading order carefully because additions and removals are reported relative to the Original file.
Will this PDF diff detect changed images or page layout?
Yes. Visual changes compares rendered pages, including text, images and layout, using Difference, Overlay and Swipe views. Text changes separately highlights changed selectable words. Scan shifts, unusual reading order and OCR mistakes can affect the differences shown.
Can I download a report of the differences?
Choose PDF, Word or HTML and set report layout, paper, orientation, margins and RTL when appropriate. Report settings prepare an updated report automatically. Generate report opens the standard download screen; Back keeps the current review available. The report contains changed text with page references. Unusual font encodings, multi-column reading order and inaccurate OCR can affect text matching.
What happens if one or both PDFs are scanned?
Image-only PDFs open Visual changes for comparing rendered pages. A downloadable text report requires selectable text; use PDF OCR first if needed. Mixed documents can be compared, with notices for pages without extracted words.
Where is my document processed?
This tool uses our servers for processing. Your original file is not overwritten; the result is a separate download. Preview and review the result where available, and download the copy you need before starting over.
