Drawing revision comparator

Compare two revisions of a PDF drawing

Drop the current and the new revision of a drawing. The tool overlays them in colour: what did not change blends in, what changed stands out. The new revision layer can be moved and resized for a perfect alignment.

Automatic change report

When the PDFs are vector files (exported from a CAD package), automatic change detection lists every dimension, tolerance or note that was modified, added, removed or moved, with its before and after value. The report prints or saves as PDF with the overlay image and numbered markers.

Your drawings stay with you

Everything happens in your browser: no upload, no storage, no account. A scanned drawing can be compared too, visually.