Frequently Asked Questions

CutArc is a free, browser-based CAD/CAM application designed specifically for CNC plasma cutting. It lets you design shapes, import DXF and SVG files, trace raster images, configure cutting parameters like kerf compensation and lead-ins, and generate G-code for your specific CNC controller — all from your web browser with no software to install.

Yes. Every feature in CutArc is available at no cost. There are no trial periods, no feature gates, and no "upgrade to export" restrictions. We support the platform through optional donations and advertising. You get the same tools whether you're a hobbyist cutting your first sign or a production shop running jobs every day.

No. CutArc runs entirely in your web browser. There is nothing to download or install. It works on Windows, Mac, Linux, and Chromebook — any device with a modern web browser (Chrome, Firefox, Edge, Safari). Your projects are saved to your account in the cloud.

CutArc works in all modern browsers including Google Chrome, Mozilla Firefox, Microsoft Edge, and Safari. We recommend Chrome or Firefox for the best experience. An internet connection is required to load the application and save projects.

Yes. Your projects and account data are stored on secure servers with encryption at rest and in transit. Passwords are hashed using bcrypt. We implement rate limiting, intrusion detection, and regular backups. You can export or delete your data at any time from your profile settings. See our Privacy Policy for full details.

CutArc generates G-code for 12+ controllers including Mach3, Mach4, LinuxCNC, GRBL, Langmuir FireControl, Hypertherm EdgeConnect, Thermal Dynamics, AXBB-E, CandCNC, Proma Compact THC, MP1000, and generic G-code output. Each post-processor is tuned for the specific dialect and features of the controller.

Almost certainly. If your table runs Mach3, LinuxCNC, GRBL, or any standard G-code controller, CutArc can generate compatible code. The generic G-code output option works with most controllers. If your specific controller isn't listed, contact us and we can look into adding support.

Yes. CutArc's post-processors include THC-specific commands for controllers that support it, including arc voltage sensing, pierce delay timing, and height control enable/disable commands. The output is tailored to each controller's THC implementation.

Yes. CutArc has dedicated post-processor profiles for Langmuir FireControl and Hypertherm EdgeConnect. Select your controller from the machine settings panel and CutArc will generate code in the exact format your machine expects, including proper arc start/stop sequences, THC commands, and feed rates.

CutArc supports importing DXF files (from AutoCAD, Fusion 360, SolidWorks, LibreCAD, etc.), SVG files (from Inkscape, Illustrator, web downloads), and raster images (PNG, JPG, BMP) via the built-in image tracer. The import assistant automatically cleans up common issues like open paths, duplicate lines, and unit mismatches.

CutArc exports G-code tailored to your selected controller. Output formats include .nc, .tap, .gcode, and .ngc depending on the controller. Each export includes proper header comments, machine-specific initialization codes, and safe shutdown sequences.

Yes. CutArc reads DXF files from virtually any CAD program including AutoCAD, Fusion 360, SolidWorks, FreeCAD, and LibreCAD. The importer handles common DXF entities including lines, arcs, circles, polylines, and splines. If you encounter issues with a specific file, our import cleanup assistant can help resolve path problems.

Kerf is the width of material removed by the plasma arc (typically 0.03" to 0.08" depending on amperage and material). Without kerf compensation, your cut parts will be slightly undersized. CutArc automatically offsets toolpaths — outward for outside profiles and inward for holes — so your finished parts match your design dimensions exactly. You can set kerf width per your plasma cutter's specifications. Learn more in our kerf compensation guide.

CutArc automatically generates lead-in paths so the plasma arc pierces outside your cut line, preventing pierce marks on finished parts. You can configure lead-in type (line or arc), length, angle, and pierce delay time in the cut settings panel. These parameters are adjustable per material thickness for optimal results.

Yes. CutArc includes a nesting engine that automatically arranges multiple parts on your sheet to minimize material waste. You can set sheet dimensions, part spacing, and rotation options. The nester supports remnant-aware nesting, defect zone avoidance, and reports material utilization statistics.

Yes. CutArc has a built-in image tracer that converts raster images (photos, logos, artwork) into cuttable vector paths. Upload a PNG, JPG, or BMP image, adjust the threshold and smoothing settings, and CutArc generates clean vector outlines ready for plasma cutting.

Yes. CutArc includes built-in stencil-ready fonts designed specifically for CNC cutting. These fonts automatically include bridges so letters like O, A, D, and B keep their center islands connected. You can also import custom text from SVG files created in Inkscape or Illustrator.

The core CAD/CAM features will always be free. We may introduce optional premium features in the future (such as team collaboration or advanced analytics), but the design, import, cutting, and G-code export tools you rely on today will remain free.

Use the contact form on our home page. We actively maintain the software and respond to bug reports and feature requests. You can also check our blog for guides and tips.

Absolutely. There are no restrictions on commercial use. Many users run CutArc for production work in fabrication shops, sign making businesses, and custom metalwork studios. The G-code output is production-ready.