Every feature exists because engineering drawing comparison has specific problems that generic tools don't solve.
🎯
Pixel-Accurate Overlay
Every pixel compared at configurable render scale. Catch even the smallest line weight change or dimension edit.
◎
Find Differences
Automatically detect and number every individual change region across all pages. Click any item in the list to jump directly to that change. Export annotated pages with numbered boxes baked in — ready for formal ECO review.
⊕
Alignment Tool
When a view shifts between revisions, the standard compare becomes noise. Crop a region, pick a reference point on each, and compare aligned.
🔎
Region Inspector
Ctrl+drag any area to pop up a three-panel view — overlay, original, and revised side by side. Copy to clipboard or save as JPG.
Ⓣ
Text Compare
When shifted text makes the pixel overlay unreadable, box-select any text region to extract and diff the actual words — additions in green, removals in red. Works on native PDF text; OCR support coming soon.
⬇
Flexible Export
Export pages as JPGs with a custom filename prefix, package into a single PDF, or copy regions directly to clipboard. Annotated exports include numbered difference boxes.