ScanRuler: free browser tool turns 3D scans into CAD models
ScanRuler, a free open-source tool from CNC Kitchen, measures 3D scans in the browser, compares them with CAD data and lets an AI agent rebuild them.

If you have ever 3D-scanned a part and then wondered how to turn that lumpy mesh into something you can actually edit, ScanRuler is aimed at you. It is a free, open-source tool from CNC Kitchen that runs in the browser.
According to the project, ScanRuler does three things. It measures 3D scans, it compares a scan with existing CAD data, and it uses an AI agent to rebuild the scanned object as a parametric model.
What is ScanRuler?
CNC Kitchen is known for 3D printing and making. ScanRuler is its take on a common problem: a scan gives you a surface made of many tiny triangles, not a clean model with dimensions you can change. A parametric CAD model is the opposite. Its sizes, holes and radii are values you can edit later, and the model updates around them.
That is the step the AI agent is meant to handle. Instead of tracing a scan by hand, you let the agent build the parametric version.
What does it cost, and where does it run?
The tool is free and open source, so the code can be inspected and changed. It works in the browser, which means there is nothing to install for a quick measurement or a comparison.
The comparison feature is useful for checking a printed or machined part against its original design. You scan the part, load the CAD file and see where they differ.
Further details, such as which scanners, file formats or AI models are supported, were not available to us, so check the project page before relying on it for a specific workflow.
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