JPG to DXF converter online

Q: Is it better to start from a JPG or a PNG?

A PNG keeps all the details and takes less work, but a JPG converts well with the Consensus algorithm and by removing specks.

Q: How do I avoid halos around the lines?

Use the Consensus algorithm, raise Remove specks and, if needed, increase contrast or enlarge the image before vectorizing.

A JPG is saved with compression, and that leaves halos and specks around the lines that dirty the vector. LineWorkCAD has algorithms designed for that problem and exports the result as DXF (or SVG and PDF). Everything runs in your browser: your image is never uploaded to a server.

Open LineWorkCAD and convert a JPG

Why a JPG takes more work than a PNG

The JPEG format discards information to weigh less. When you zoom into a JPG you see tiny blocks and stray colors next to the edges. If it is vectorized as is, every speck becomes an extra outline.

How to convert a JPG to DXF

Open the JPG. Drag it onto the screen; it is vectorized automatically.
Choose the “Consensus” algorithm. In the “Vectorize image” panel, this mode traces the image 9 times with different saturation and brightness and keeps only the lines that repeat: that discards the compression noise. (It is about 8 times slower, but worth it for small or heavily compressed images.)
Raise “Remove specks” to delete stray dots and “Simplify” if there are too many vertices.
If there is a background, the image editor can remove it automatically before vectorizing and enlarge the image ×2 or ×3.
Fix and export. “Fix” closes gaps and trims overshoots; then save the DXF.

Open LineWorkCAD

Tips for a better DXF from a JPG

Use the highest-resolution version you have, and avoid re-saving the JPG several times: each save adds loss.
Logos and high-contrast drawings give much better results than photographs.
For manufacturing, black and white mode with the threshold well adjusted usually gives cleaner outlines than color mode.
Set the final width in millimeters so the DXF comes out at real size.

Frequently asked questions

Is it better to start from a JPG or a PNG?

A PNG keeps all the details, so it takes less work. Still, a JPG converts well if you use the Consensus algorithm and remove specks.

How do I avoid halos around the lines?

Use “Consensus”, raise “Remove specks” and, if needed, run the image through the editor to increase contrast or enlarge it before vectorizing.

Is it free?

There is a free trial with all features: 3 downloads and 3 images. After that, Pro costs US$ 4.99 a month or US$ 45 a year.

Is my JPG uploaded to a server?

No. Vectorizing happens in your browser. More details in the privacy policy.

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