What is a lithophane?

A lithophane is a thin panel whose thickness follows photo brightness — a classic backlit gift. Print in white PLA at 100% infill, standing vertically.

Can I convert PNG and JPG to STL on my phone?

Yes. Open this page in mobile Safari or Chrome, upload a photo and download the STL — conversion runs locally on your device.

Free · In-browser · Print-ready

Image to STL Converter: PNG & JPG to 3D Print STL

This free image to STL converter turns any PNG or JPG into a watertight STL for 3D printing — relief, logo extrude, lithophane and keychain modes with live 3D preview. Everything runs privately in your browser.

4 print modesLive 3D previewNo server uploadWatertight STL

Convert image to STL — upload below

Drop an image here or click to upload

PNG, JPG, WebP, GIF, HEIC — up to 50 MB. Your file never leaves your device.

No image? Try a sample:

Convert any image to STL for 3D printing

Need an image to STL converter that keeps your photos private? This free tool runs entirely in your browser: drop a PNG, JPG, WebP or HEIC file, pick one of four print modes, tune depth and size in real millimeters, preview the mesh in 3D, then download a watertight binary STL ready for Cura, PrusaSlicer or Bambu Studio. Whether you are making a logo keychain, backlit lithophane, embossed portrait or desk badge, heightmap sampling and mesh export happen locally — your image never leaves your device. No upload queue and no conversion limits.

How to convert an image to STL

Upload your image

Drag a PNG, JPG, WebP or HEIC file into the workbench — iPhone photos work without extra apps.

Pick an image to STL mode

Choose relief, extrude, lithophane or keychain and adjust print width, depth, resolution and smoothing.

Download your STL file

Export a closed, watertight mesh in millimeters and open it in any slicer required.

Why use this image to STL converter?

Four tuned modes, instant 3D preview and private in-browser conversion — built for real FDM prints.

Four image to STL conversion modes

Photo relief, logo extrude, lithophane and keychain — each tuned with sensible defaults for real 3D prints.

Live 3D preview before you slice

Every slider rebuilds the mesh in under a second. Orbit the model and confirm wall thickness before export.

Private image to STL processing

Your image never leaves your device. Heightmap sampling and mesh export run locally in the browser.

Watertight binary STL output

Closed meshes in real millimeters — top surface, base and side walls — ready for any slicer.

Popular image to STL print projects

From quick keychains to detailed lithophanes — common maker projects this image to STL tool handles well.

Logo keychains from image to STL

Extrude a brand logo, add a 4 mm hole and print flat on the bed in under an hour.

Lithophane gifts

Family photos as backlit panels — print white PLA at 100% infill, standing vertically.

Photo relief art

Portraits and landscapes embossed onto panels — brightness mapped to printable height.

Desk signs & badges

High-contrast logos and QR codes extruded into name plates and booth signs.

Image to STL FAQ

Is this image to STL converter really free?+

Yes. All four modes are free — no watermarks and no conversion limits.

Do you upload or store my images?+

No. This image to STL converter runs entirely in your browser — your image never leaves your device.

Which images work best for image to STL conversion?+

High-contrast silhouettes suit extrude and keychain modes. Portraits and pets suit relief and lithophane prints.

Is the exported STL watertight?+

Yes. Every export is a closed mesh with a top surface, flat base and perimeter walls — it slices cleanly in Cura, PrusaSlicer and Bambu Studio.