STLKit3D

Free CAD Utilities
Browser-Based • Instant .STL

Parametric 3D Printable STL Tools

Create clean, watertight models right in your browser. Eliminate 3D modeling friction for everyday prints.

Keychain Tag Generator

Create a flat name tag with raised text and a mounting hole.

Rotate: Left-Click • Zoom: Scroll

Parametric Storage Box

Custom dimension container with uniform shell thickness.

Rotate: Left-Click • Zoom: Scroll

Flat Lithophane Maker

Converts any uploaded photo into a light-transmitting relief mesh.

Preview shows grayscale heightfield mapping

Snap-In Desk Cable Clip

Print-in-place U-channel organizer for USB and power cables.

Rotate: Left-Click • Zoom: Scroll

Single-Extruder Color Swap Calculator

Calculate the exact pause layer height for dual-tone prints.

Slicer Pause Directives

Calculated Swap Layer: Layer 15
Target Z-Height Pause: 3.00 mm
G-code Command: M600

In PrusaSlicer / Bambu Studio / OrcaSlicer: Right-click the layer slider at the specified Z-height and select "Add pause" or "Change filament".

Filament Density & Cost Calculator

Estimate raw material consumption and part pricing.

Material Breakdown

Estimated Weight: 31.0 g
Raw Filament Cost: $0.62
Spool Yield: ~32 identical copies

Filament Thermal Shrinkage Compensation

Scale parts in your slicer to ensure press-fit mechanical tolerances.

Scale Adjustment Factors

Slicer Scale Percentage: 101.63 %
Pre-Compensated CAD Dimension: 50.81 mm

Input the slicer scale percentage into your X/Y scaling factors before slicing to avoid undersized functional assemblies.

100% Watertight Mesh Geometry

Every generator uses parametric extrusion algorithms that prevent non-manifold edges, inverted normals, and unclosed surfaces, ensuring your slicer interprets the file cleanly.

Dual-Color Printing Made Accessible

Achieve striking contrast on keychains and QR codes using a single-extruder 3D printer. Pair our generators with the Color-Swap Calculator to pause and swap spools at the precise layer.

Zero Cloud Storage & High Privacy

Your uploaded photos for lithophanes and entered custom text never hit an external server. Everything processes inside your browser's WebGL and WebAssembly instance.