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Compare Two PDFs — Find Differences Free
Put two PDFs side by side and spot exactly what changed — revised contracts, updated reports, new document versions. Differences are highlighted, and you can download a diff report. A lifesaver for contracts, where a single changed clause can matter enormously.
How to compare two PDFs
Open the original PDF and the revised PDF in the Compare tool.
Run the comparison — text differences are detected automatically.
Review highlighted changes page by page.
Download a diff report of all changes.
Why use PDFZippy for this
Side-by-side visual comparison
Text differences highlighted automatically
Downloadable change report
Works on contracts, reports and drafts
Private — documents never uploaded
Tips for best results
Both PDFs need selectable text — scanned pages can't be text-compared.
Compare near-final versions, not early drafts, to keep the report readable.
Download the diff report as your permanent record of what changed.
For contracts, compare the signed version against your last draft.
Frequently asked questions
How does PDF comparison work?
The tool extracts text from both PDFs and matches them page by page, highlighting added, removed and changed passages — like track changes for PDFs.
Can it compare scanned PDFs?
Scans have no text layer, so text comparison won't work on them. Both PDFs need selectable text for accurate diffs.
What does the diff report include?
A page-by-page list of changes — what was added, deleted or modified — downloadable as its own PDF for sharing or records.
Will it catch formatting changes too?
The focus is text content. Layout-only changes (fonts, spacing) are harder to diff reliably and may not be flagged.
Are my documents uploaded for comparison?
No — both files are compared locally in your browser.