PNG to STL Converter

A PNG is a grid of colored pixels. This converter calculates each pixel's luminance and maps it to a physical height, producing a relief surface that follows the light and dark areas of the image.

The tool adds a flat base, a bottom face, and perimeter walls, so the download is a closed binary STL rather than a loose sheet of triangles. You control the width, base thickness, relief depth, and height direction.

Start with a high-contrast image whose important shapes remain clear at small sizes. Grayscale source art makes the height relationship easiest to predict, but color images also work because the browser converts their luminance.

Soft photographic noise becomes surface noise. Blur or simplify the source before conversion when you want broad, printable forms. Transparent pixels fall back toward the base instead of creating unsupported holes.

The PNG is decoded with browser APIs and the STL is built on your device. No source image, mesh, or prompt is sent to an AI provider, and the tool does not inspect your account balance.

That makes this the right choice when you need deterministic relief geometry or handle private source artwork. Full-object reconstruction is a different problem and is available through the paid Image to STL workflow.

STL records geometry but does not prescribe a printer, material, layer height, or support strategy. Verify the width in millimeters after import and make sure the base is thick enough for your process.

For a lithophane, the contrast you see depends on material translucency and the range between base thickness and peak height. For stamps and plaques, consider mirroring the source and keeping narrow features above your nozzle or resin-resolution limit.