Generate a 2D technical drawing from a STEP file — online, in a minute

How it works

1. 1Upload your STEP file (assemblies are split into parts automatically — up to 30 parts plus an assembly drawing).
2. 2Check each part in 3D, lay it flat the way production needs it, and name it.
3. 3Generate: every part gets its own drawing package with a bilingual title block.
4. 4Download PDF, SVG, DXF and STL — or fine-tune dimensions and paper scale first.

How Drawlytic turns a STEP file into a drawing

A STEP file (.step or .stp, in AP203, AP214 or AP242 flavor) carries the exact boundary-representation solid your CAD system modelled — not a mesh approximation. Drawlytic loads that solid with the OpenCascade CAD kernel and projects the front, top and right orthographic views plus an isometric view using true hidden-line removal (HLR): visible edges come out as solid lines, edges hidden behind material come out dashed, exactly as engineering drawing conventions require. The output is vector line art, not a rendered screenshot.

Dimensioning happens on the same exact geometry. The engine detects circular features and groups identical holes into counted callouts like 4×Ø8, finds fillet radii (R) and chamfer or taper angles, measures overall width, height and depth, adds thickness chains and center marks, and places the labels so they don't overlap. Because every number is measured on the B-rep solid, the dimensions match what your CAD software reports — in millimetres.

Before anything is drawn you decide what 'front' means: every part opens in an interactive 3D preview where you rotate it, snap a chosen face flat, and name it. Orientation determines which features are dimensioned most clearly, so the guide rule is simple — put the most detailed face toward the front or top view.

Assemblies, cross sections and adjustments

Multi-body STEP assemblies are split automatically: each solid becomes its own part with a complete drawing package, largest part first, up to 30 parts per upload (25 MB max) — and the whole model gets an assembly overview drawing. Parts you don't need can be excluded in the preview before generating.

After generation, two things are free and unlimited on every drawing you own. Measure & adjust lets you click any edge for its dimension, measure point-to-point distances and angles, drag dimensions to better positions, pick a paper scale (fit, 1:1, 1:2, 1:4 or 1:8) and re-render the drawing and all PDF sheets. Cross sections cut the part along a line you draw and produce a proper SECTION A-A view with cut faces hatched at 45°, as its own SVG and PDF sheet.

Every project is saved to your account with its part names and files, so you can come back, re-download, or refine a drawing weeks later without re-uploading the model.