Choose your file
Select a supported file from your device. Check the format and size limits.
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How to make an STL file
Creating STL files starts with choosing the right source: a silhouette or grayscale image, an existing mesh, or supported CAD exchange geometry. The source determines what the result can contain.
FROM FILE TO FINISHED MESH
How to convert your file
Review your settings
Choose the right mode, scale and detail. Processing runs in your browser.
Inspect and download
Rotate the preview, save the output and verify it in your next application.
Outline or heightmap?
Outline extrusion gives foreground a uniform depth. Heightmap relief turns brightness into surface height above a base. Transparent pixels can remain outside the model. Neither mode reconstructs the hidden sides of a photo.
Quality and limits
High detail uses 512 samples on the longest image edge. PNG/JPEG: 20 MB and 24 million pixels. SVG: 2 MB. STEP: 20 MB. Mesh input: 50 MB. Outputs are capped at 1.2 million triangles and processing stops after 90 seconds.
Keep files local
Files are processed in this tab and not uploaded to a conversion server. Downloads remain on your device. Read the privacy policy.
Keep learning
Explore all tools, practical guides and free examples.
STL file generation is not one universal operation
Image conversion creates an outline extrusion or heightmap relief. Mesh conversion exchanges supported surface geometry, while STEP import tessellates CAD surfaces into triangles. Start with the workflow that describes your source instead of renaming a file or expecting unseen geometry to appear.
Review the output dimensions, inspect fine features and reopen the download in the software that will use it. Keep the source document if you need future editable text, parametric features, materials or printer settings.
Create STL geometry from artwork · Convert an existing 3D mesh · Choose a CAD import workflow