Side-by-side or overlay PDF diff with a document-type selector — Document (contracts, reports), AEC / Blueprint (drawings, schematics), or Image-Scan. Highlights pixel-level differences plus a word-level text diff in a modal.
Open a STEP / STP part and it measures itself — holes, BOM, wall thickness, draft + undercut checks, and mass, detected automatically. Measure, section, screenshot. Rust + WASM B-rep kernel, runs in your browser.