Completely free with a massive community for tutorials; outputs editable SVG files natively.
She found Inkscape (free vector editor). Imported the BMP. Selected it, then went to Path > Trace Bitmap . She clicked “Single Scan” — Edge Detection. The clay silhouette turned into clean vector paths. She ungrouped, deleted stray nodes, and saved as DXF.
| Feature | Scan2CAD (Paid) | Inkscape | QCAD (Free) | AnyConv | Convertio | | :--- | :--- | :--- | :--- | :--- | :--- | | | ✅ AI-driven | ✅ Potrace | ✅ Basic | ✅ Automated | ✅ OCR-driven | | DXF Export | ✅ | ⚠️ (Plugin) | ✅ | ✅ | ✅ | | Batch Processing | ✅ | ❌ | ❌ | ❌ | ❌ | | Text Recognition | ✅ (Add-on) | ❌ | ❌ | ❌ | ✅ | | Cost | $349+ | $0 | $0 | $0 | $0 (limited) | | Learning Curve | Low | Medium | Medium | None | None |
If you need to convert a blueprint where the text needs to be editable, and the arcs need to be perfect tangents, free software will cost you hours of manual cleanup.
3.7 OCR/Text extraction: Tesseract + manual anchoring
Ensure your scan is at least 300 DPI.
Scan2cad |best| Free Alternative
Completely free with a massive community for tutorials; outputs editable SVG files natively.
She found Inkscape (free vector editor). Imported the BMP. Selected it, then went to Path > Trace Bitmap . She clicked “Single Scan” — Edge Detection. The clay silhouette turned into clean vector paths. She ungrouped, deleted stray nodes, and saved as DXF.
| Feature | Scan2CAD (Paid) | Inkscape | QCAD (Free) | AnyConv | Convertio | | :--- | :--- | :--- | :--- | :--- | :--- | | | ✅ AI-driven | ✅ Potrace | ✅ Basic | ✅ Automated | ✅ OCR-driven | | DXF Export | ✅ | ⚠️ (Plugin) | ✅ | ✅ | ✅ | | Batch Processing | ✅ | ❌ | ❌ | ❌ | ❌ | | Text Recognition | ✅ (Add-on) | ❌ | ❌ | ❌ | ✅ | | Cost | $349+ | $0 | $0 | $0 | $0 (limited) | | Learning Curve | Low | Medium | Medium | None | None |
If you need to convert a blueprint where the text needs to be editable, and the arcs need to be perfect tangents, free software will cost you hours of manual cleanup.
3.7 OCR/Text extraction: Tesseract + manual anchoring
Ensure your scan is at least 300 DPI.