Convert STEP to ICO
Convert STEP to ICO online: the model drawn as a clean isometric line view, saved as a 256 × 256 ICO icon. Free, no sign-up.
Drop your STEP files here
Up to 50MB per file.
Conversion Settings
Files are encrypted and auto-deleted after conversion
How to Convert
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Upload your STEP files
Drag and drop or select STEP files from your device. You can upload multiple files at once.
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Configure Output
Choose any available ICO output options, then start the conversion.
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Download ICO files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert STEP to ICO?
STEP (ISO 10303) is the neutral exchange format for precise 3D CAD models, exported by SolidWorks, Fusion, CATIA, Inventor and most other engineering tools. FreeCAD reads the solid and every edge is projected into a standard isometric view, drawn as dark lines on white so the full wireframe of the part is visible.
ICO output is a 256 × 256 pixel Windows icon: the image is scaled to fit with its proportions kept, and the surrounding space is transparent.
Frequently Asked Questions
How do I convert STEP to ICO?
Drop your STEP file above and press Convert. Our servers load the model in FreeCAD, project its edges into an isometric drawing, place it on a PDF page and render that page as the image you chose. The result is saved as a 256 × 256 ICO icon, ready to download.
Which view of the model appears in the ICO from a STEP file?
A standard isometric view, looking down on the model from one corner with the Z axis pointing up, so length, width and height all show in one image.
Are curved surfaces of a STEP model drawn smoothly in the ICO?
Yes. Each curved edge is traced in short segments sized to the model, about 1/1200 of its overall diagonal, so circles, fillets and holes appear as smooth curves.
Which part of the STEP becomes the ICO icon?
The first page of the rendered content is used for the icon, fitted inside the 256 × 256 square with its proportions kept.
What size is the ICO made from a STEP file?
The icon is 256 × 256 pixels, the largest standard Windows icon size. The image is fitted inside the square with its proportions kept and a transparent surround, stored as a PNG-compressed icon.
Is my .step file kept private?
Your file is uploaded over an encrypted connection, converted on our servers and deleted automatically within 24 hours. We never read, share or keep your files, and no account is needed.