Pick a circle or a square and tap two points to create a track. For each used point, pick male or female. Tracks cross at the same level, and you download the result as an STL for printing.
Design custom junctions, crossings and switches for wooden toy train tracks such as IKEA Lillabo and Brio. Choose the connection points, set male or female connectors, check the model in 3D and download a ready-to-print STL file for your 3D printer. Free, in the browser, no sign-up.
Does it fit IKEA Lillabo and Brio? Yes. The default sizes come from tracks that were printed and tested many times. If your track differs, every size can be adjusted.
How do I print it? PLA, 0.2 mm layers, no supports, flat side down. Print a small test piece first to check how the connectors fit.
Is it free? Yes, completely free. The STL is yours to print at home.