Gridfinity base converter

Replace male feet or female sockets on a fixed 42 mm grid.

Starting CAD support…

1 · Model file

STEP · STL · 3MF · more

No model selected

Model details, formats and units

All supported formats

STEP/STP, STL, 3MF, OBJ, IGES, BREP, PLY, AMF, OFF, glTF/GLB, COLLADA and FBX. Choose one model at a time. Include .bin files with glTF. Large CAD previews are adapted automatically; original STEP/BREP geometry is retained. Mesh input limit: one million triangles.

Units and source dimensions

Coordinate units

Source measurements

Example and local processing

Files are processed in your browser.
No model upload to a server.

Use the built-in 2 × 1 sample instead of a file.

Up to 50 MB · closed solids · processed locally

Replacement base

Target style

Replacement depth · mm

Friction adjustment / side · mm

Hardware dimensions

Magnets

Pocket diameter · mm Depth · mm

M3 screwsDepth mode

Hole diameter · mm Requested depth · mm

Minimum solid roof · mm

Hardware centers are ±13 mm from each cell center. Male screw holes retain a solid roof; Fit mode can shorten them. Female screw holes pass through the replacement floor. Holes are cylindrical and unthreaded.

Choose a style, then click Convert feet.

Fit and replacement notes

Screw holes fit within the available floor by default. The result shows the actual depth; choose Exact depth under Hardware dimensions to require a fixed depth.

Male feet use a 4.75 mm profile above the bottom. Female sockets use a 5 mm cavity measured inward from the rim. Replacement depth bounds the edited region; magnet and weighted floors extend it when needed. Deeper supports remain unchanged.

Positive = tighter fit: larger male feet or smaller female sockets. Negative = looser fit. Applied per side; 0.05 mm changes total width by 0.10 mm. Type hundredths; arrows step by 0.05 mm. Range: −0.50 to +0.20 mm per side.

2 · Review feet 0 selected

Adjust orientation or detection

Interface to detectBase-facing direction

Extra yaw · ° Foot bottom Z · mm

The detected base faces downward in the viewer. Bottom Z is measured from the lowest point in that orientation. Use these controls if another feature projects below the feet.

Choose a model to detect its feet.

Use	Cell	Center · mm	Match

Click a foot marker in the viewer to select it. Unselected feet keep their original design.

Correct the grid or add a cell

All new feet use 42 mm spacing. Move the common origin, or add a cell by integer column and row. Manually added cells still pass connection and preservation checks.

Origin X · mm Origin Y · mm

Column Row

Model and selected feet No model

Choose a model to detect its male feet

Choose a model to preview it here.

Drag to orbit · scroll or pinch to zoom · select feet in Original view

Selected footUnselected foot

Section view and detection measurements

Clipping view (open cut)Show below Z · mm 7.0

Detection measurements

4 · Export

Review the highlighted feet, then generate a conversion preview. Export buttons become available after geometry checks pass.

Export options, checks and format details

Mesh output · STL and 3MF

Export in the imported orientation and position (millimetres)

Default export uses the detected base-down orientation. 3MF contains the selected part and a conversion report, without printer settings. STEP and BREP inputs preserve CAD surfaces through native solid operations and provide validated BREP export. STEP translation is validated separately when requested. CAD mesh exports start at 0.01 mm deviation and adapt automatically for large models; the actual value is recorded in the conversion report. Source colors, textures, assembly structure and CAD feature history are not retained.

How detection works and its limits

Automatic detection checks male feet and female sockets at several depths. Only complete cells on a 42 mm grid are selected. Review the orientation and selected cells before converting. Socket replacement changes only the selected cell regions; deeper supports remain intact. Positive friction makes male feet larger or female sockets smaller.