Free online TIFF to DXF converter

CAD software, CNC/CAM tools, and drafting workflows require DXF when a scanned drawing must become editable lines, arcs, and polylines instead of a view-only image. Converting the TIFF requires raster-to-vector recognition; changing the extension or placing the image inside a DXF does not create CAD geometry.

What the TIFF format is

TIFF (Tagged Image File Format) is a raster format used for scanned engineering drawings, maps, plans, archival documents, and high-resolution linework. It stores pixels with uncompressed, LZW, or ZIP compression and can contain monochrome, grayscale, color, and multiple-page image data.

Scanners, multifunction printers, GIS and document-management systems, Photoshop, and publishing applications commonly create TIFF files. In CAD work, a TIFF normally represents a paper drawing or plot scanned at a fixed resolution; its lines are pixels, not selectable CAD entities.

What the DXF format is

DXF (Drawing Exchange Format) is a text-based or binary CAD format developed by Autodesk for exchanging drawing data between AutoCAD and other CAD applications. It can store lines, polylines, arcs, circles, hatches, text, dimensions, blocks, layers, coordinates, and related drawing properties.

DXF makes geometry editable, measurable, plottable, and importable into CAD, CNC, and CAM software. Compatibility depends on the DXF version and exported entities; R12 is often more compatible with older CAD and CAM applications than newer versions.

How to convert a TIFF to DXF

Using the online converter

1. Open the TIFF-to-DXF converter on 101convert.com; the service can be used free without installing software.
2. Upload the .tif or .tiff file and select DXF as the output format.
3. Choose raster-to-vector, line-recognition, or tracing options when available. Use monochrome or line-art processing for a technical drawing instead of a photographic mode.
4. Set the physical size, units, or scale from a known dimension if the converter provides those settings. Without a reliable reference dimension, calibrate the result in CAD.
5. Start the conversion and download the generated .dxf file. Open it in a CAD editor or viewer, inspect the geometry and scale, and save it in the DXF version required by the receiving application.

The online method is best for clean scans and simple linework. It cannot recover design intent, original layers, exact dimensions, or vector precision that the TIFF does not contain.

Desktop alternatives

AutoCAD Raster Design can import the TIFF, correct rotation and skew, clean the bitmap, and vectorize lines, polylines, arcs, circles, and some text. Import the image with Insert → Image, set its scale from a known measurement, use the raster-to-vector tools, place the resulting entities on appropriate layers, remove the source image after verification, and export with File → Save As to the required DXF version.

Dedicated raster-to-vector applications such as Scan2CAD provide preprocessing, recognition tolerances, batch conversion, and DXF export. Inkscape can trace simple monochrome images with Path → Trace Bitmap and export DXF, but it is less suitable for dimensionally critical mechanical drawings. Adobe Illustrator's Image Trace is useful for simple artwork, not for reliable CAD reconstruction.

Quality and compatibility limits

• Raster-to-vector conversion is interpretation, not copying. Recognition can produce gaps, duplicate lines, excess nodes, false circles, fragmented polylines, or incorrect text. Check critical geometry manually.
• A scan of about 300–600 dpi usually preserves technical linework adequately. Low resolution loses thin lines; excessive resolution increases noise and processing time.
• Deskew the image and remove borders, stains, speckles, stamps, and handwriting before tracing. Thresholding grayscale content to black and white can improve recognition but may remove faint details.
• Verify scale against a known dimension. Pixel dimensions and TIFF DPI metadata do not prove the original drawing scale after scanning, cropping, resizing, or printing.
• Text recognition is less reliable than line recognition. Check characters, fonts, rotation, and placement; redraw uncertain text or retain it as geometry.
• Some DXF files can reference the original TIFF as a raster image. That creates a visual image reference, not editable vector geometry.
• Before delivery, check drawing units, model-space coordinates, layer names, closed polylines, duplicate entities, line types, line weights, and the DXF version supported by the recipient's software.