LibreCAD is a fork of QCAD’s older codebase. It is 100% free and does not nag you to upgrade. However, its raster-to-vector tool is rudimentary—it essentially traces based on color ranges.
Inkscape is the GIMP of vector graphics. While designed for artists, its feature (based on Potrace) converts bitmaps to vectors flawlessly. scan2cad free alternative
Convertio’s CAD conversion actually recognizes text and converts it to editable text entities (not just lines). Scan2CAD’s OCR is an add-on module that costs extra. LibreCAD is a fork of QCAD’s older codebase
Quick, non-confidential conversions where "good enough" is fine. 5. Convertio (Freemium with Generous Free Tier) Platform: Web Browser Output Quality: ★★★★☆ Inkscape is the GIMP of vector graphics
Recognizes dashed lines, hatches, and text. Cons: Requires daily limits; no batch processing free.
Mechanical engineers dealing with multi-sheet PDFs who don't mind a little extra work. 7. Manual Tracing in FreeCAD (The "No Automation" Method) Platform: Windows, Mac, Linux Output Quality: ★★★★★ (but slow)