Compare PDF Drawings Automatically
Stop checking drawings page-by-page. Upload two PDF revisions and PDFverifier highlights every change directly on the drawing — additions in green, deletions in blue, modifications flagged.
Designed for technical drawings
Generic PDF comparison tools were built for text documents — they fail badly on drawings, where every line and symbol matters and most content is graphical, not text. PDFverifier was built specifically for the way engineers, architects, and project managers actually use PDFs: comparing technical drawings against earlier revisions to confirm what changed.
What it catches
- New objects, lines, dimensions, and annotations
- Removed elements that disappeared in the new revision
- Moved or modified geometry — even small shifts
- Changed line weights and hatching patterns
- Modified text labels, dimensions, and revision blocks
Workflow built for drawing review
Adjustable sensitivity
Tune detection per drawing — strict for clean CAD exports, relaxed for scans.
Selective approval
Pick which changes to include in the export, reject the rest.
Comments per change
Add notes to individual changes for downstream review.
Annotated PDF export
Download a clean PDF showing approved changes with comments.
Try it on your drawings
Free previews — upload a real drawing revision pair and see what's detected.
Compare drawings free →