Side-by-side visual comparison. Pixel-level diff highlights what changed between versions — additions in green, removals in red. No server. Nothing leaves your device.
PDFZero compares two PDF files side-by-side to highlight text and visual differences between them — entirely in your browser. No upload, no signup, no watermark.
Comparing two versions of a document by eye is slow and error-prone, especially for long contracts or reports. Automated comparison quickly surfaces exactly what changed between drafts, revisions, or signed versions.
Both text differences (added, removed, or changed wording) and visual differences between the page layouts of the two documents.
No, the comparison runs entirely in your browser — neither file is uploaded anywhere.
Yes, the tool will compare overlapping pages and flag pages that were added or removed between the two versions.
Yes, comparing contract drafts is one of the most common use cases — though always do a final manual review for anything legally significant.
Yes, fully free with no signup required.