DXF Cut Preflight — Check Laser & CNC Files

Open DXF files locally and check cut paths before laser or CNC cutting.

Open a DXF file locally and find cut-file risks before it reaches a laser, CNC router, waterjet, plasma table, or fabrication shop. DXF Cut Preflight is a focused DXF viewer for clean, flat cut files — not a general CAD system. Your drawing stays on your computer: nothing is uploaded. Use it to answer one practical question: is this DXF ready for the checks this tool can verify? WHAT IT DOES • See the drawing. Open ASCII, model-space DXF files; pan, fit, inspect layers, and measure between two points. • Check cut paths. Detect open paths, exact duplicate or coincident segments, partial overlaps, crossing segments, zero-length segments, and geometry outside an optional bed size. • Resolve wrong-scale risk. Read the declared units, or require a deliberate millimetres, inches, or feet choice before issuing a result. • Keep a conservative result. PASS means the drawing passed the checks in scope. WARN means the check is incomplete or needs review. FAIL means a detected cut-risk problem needs attention. • Keep files private. Processing happens locally in the extension. The drawing is not uploaded and no file-data telemetry is sent. MADE FOR LASER CUTTING AND CNC WORK If you receive DXF files for cutting, this helps you open a DXF file, inspect its geometry, and catch common reasons a shop or CAM workflow may reject it: DXF open paths, DXF duplicate lines, missing units, and bed-fit problems. SCOPE AND LIMITS This is deliberately narrow so its result stays useful. • What it checks. Flat-cut topology for LINE, LWPOLYLINE including bulged segments, legacy POLYLINE, ARC, CIRCLE, ELLIPSE, and valid SPLINE geometry; units; duplicate, coincident, partially overlapping and crossing segments; zero-length segments; and optional bed bounds. • What it renders. LINE, LWPOLYLINE, POLYLINE, ARC, CIRCLE, ELLIPSE, SPLINE, POINT, and INSERT are rendered where the parser can interpret them. Layers can be toggled. • What becomes review, not PASS. Unsupported entity types, malformed SPLINE, 3D and polyface geometry, and anything else that cannot be safely topology-checked prevent a clean PASS. Undeclared units hold the verdict until you declare them. TEXT and MTEXT are treated as annotations rather than cut geometry, and are listed rather than silently dropped. • What it does not support. DWG, binary DXF, paper space, xrefs, editing, cloud processing, accounts, and sharing are not supported. • Shared edges. A full shared edge between adjacent contours is reported for review rather than failed, because common-line cutting is often deliberate. A partial overlap fails as likely accidental. • Intended input. Clean flat cut files are the target. In current testing, all 16 clean flat-cut targets rendered acceptably; arbitrary or complex CAD samples rendered acceptably far less often (3 of 12). If a drawing is outside this scope, treat the result as review required rather than a manufacturing decision. PRIVACY The extension requests no Chrome permissions and no host permissions, and makes no network requests as part of its feature set. There is no account, no sign-in, and no telemetry containing file data. Looking for a DXF viewer alternative built for cut files rather than general CAD? A viewer answers "what does this drawing look like." This answers "is this cut geometry sound," which is a different question — two lines stacked on identical coordinates look like one perfect line, and a contour with a 0.001 mm gap looks closed. Free in v1. Website and full preflight checklist: https://www.dxfpreflight.com Support: support@dxfpreflight.com