Choose your file
Select a supported file from your device. Check the format and size limits.
Free online tools
ZIP to STL converter
Use the ZIP to STL file converter for supported model content inside an archive. A ZIP is a container; its extension does not tell you which model formats it holds.
01 Choose your file
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3D preview
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Download✓ Files stay on your device✓ Gray 3D preview✓ Free downloads✓ No account needed
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.
Choose the intended mesh inside the archive
An archive can include several models, images and instructions. Check that the contained geometry is supported and that the selected result is the part you actually want. If the archive cannot be read, extract it locally and open a supported model file directly rather than renaming the ZIP as STL.
Identify and extract the correct model · Choose a converter for the extracted format
Processing limits
STEP input: 20 MB. STL, OBJ and 3MF input: 50 MB. Output is limited to 1.2 million triangles. Complex models may need simplification in the source application.
One file at a time. Processing stops after 90 seconds. Files remain in browser memory, and no conversion upload is performed. Replacing a file clears the previous result. Closing the tab releases its working data.
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