Image to STL

Two modes: brightness heightmap (terrain, coins, textures) or threshold-extruded logo (plaques, stamps). Everything runs in your browser.

What this tool does

How it works

  1. 01

    Upload the image

    PNG or JPG. Photos for relief; high-contrast logos for plaque mode.

  2. 02

    Pick the mode

    Heightmap turns brightness into height; threshold separates figure from background and extrudes the figure.

  3. 03

    Download the STL

    A watertight solid with a base, slicer-ready with no repairs needed.

Frequently asked questions

How is this different from a lithophane?

A lithophane is viewed backlit (thickness blocks light); this tool's relief is viewed in direct light (height creates shadows). For backlit photos use the lithophane tool; for coins, plaques and logos, this one.

Which images work in threshold mode?

High-contrast logos and silhouettes with a clean background. The threshold splits light from dark: soft gradients or photos with shadows produce noisy edges — that's what heightmap mode is for.

Why does the result always have a base plate?

An extruded figure without a base can end up in loose pieces or with zero-thickness walls, impossible to print. The plate guarantees a single rigid part; its thickness is configurable.

What relief height works best?

For coins and plaques, 1–3 mm of relief over a 2–3 mm base prints without supports and reads well. Reliefs above 5 mm start needing more sloped walls.