Compare PDF Files

Compare PDF files and see exactly which words changed between two versions. Additions show in green, deletions in red.

or drop it here Processed on your device. Nothing is uploaded.

How to compare PDF files

Drop the original PDF into the first slot.
Drop the new version into the second slot.
Run the comparison and read the highlighted differences and change count.

Compare two PDF files for differences

The tool extracts the text from both files and shows a word-level diff. Added words are green, removed words are red, and a count tells you how many changes there are.

That makes it quick to review a revised contract or check an edited draft. The compare two PDF files guide has a review routine.

Text only, not layout

Only text is compared. Changes to images, fonts or layout do not show up. Scanned PDFs have no text to compare, so run OCR PDF on each scan first. To read the full text of one version, use PDF to Text.

Guides

How to Compare Two PDF FilesHow to compare two PDF files: load both, get a word-level diff with additions in green and deletions in red. Free, runs in your browser.How to Make a PDF Searchable, Even a ScanHow to make a PDF searchable with free OCR: add a hidden text layer so scanned pages can be searched and copied. Runs in your browser.

Frequently asked questions

How do I compare two PDF files?

Drop one PDF in each slot and run the comparison. Word changes are highlighted in green and red.

Does it compare images or formatting?

No. It compares text only, so image and layout changes are not shown.

Can I compare scanned PDFs?

Run OCR PDF on both scans first so they have text, then compare them.

Is it free to compare PDF files online?

Yes. No signup, and both files are compared in your browser without being uploaded.

Can I compare Word documents?

Not directly. Export both to PDF first, then compare them here.