PCB Print Forge

A browser-based generator for 3D-printable PCB-style models from three PNG masks:

• Outline mask: base shape/depth (required)
• Trace mask: extra raised depth on top of the outline (optional)
• Hole mask: carved out through all layers (optional)

Keep vs Carve Rule

For every PNG:

• White pixels are treated as "out" (removed)
• Non-white pixels are treated as "keep" (solid)

Use the White threshold control to decide what counts as white.

Accurate Real-World Scale

• If your PNG was exported with a known DPI (for example 1000), enable Use DPI to auto-calculate XY scale.
• The generator uses: mm per pixel = 25.4 / DPI.
• If images are downsampled by Max image dimension, the app automatically compensates so physical STL size remains correct.
• For tighter dimensional accuracy, increase Max image dimension (for example 700-1000) to reduce raster quantization error on edges.

Run

Open index.html in a modern browser.

No build step is required.

Output

Click Export STL after generating to download a binary STL file you can slice for 3D printing.

Notes

• All masks are resized to the outline dimensions and limited by Max image dimension for performance.
• The mesh is generated from voxels for predictable behavior from mask data.
• You can tune horizontal scale with XY size per pixel (mm) and depth with Layer step in Z (mm).