Convert STEP to BMP
Convert STEP to BMP online: the model drawn as a clean isometric line view, saved as an uncompressed BMP bitmap. 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 BMP output options, then start the conversion.
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Download BMP files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert STEP to BMP?
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.
BMP stores every pixel uncompressed, so the image is exact and simple to read by any software that handles Windows bitmaps.
Frequently Asked Questions
How do I convert STEP to BMP?
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 an uncompressed BMP bitmap, ready to download.
Which view of the model appears in the BMP 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 BMP?
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.
What happens when a STEP file fills several BMP pages?
Each page is rendered at 144 dpi and saved as its own BMP image, named page-1, page-2 and so on, and they download together as one ZIP. A single page downloads as one BMP file.
What kind of BMP does the STEP converter create?
A standard Windows bitmap with every pixel stored uncompressed, so the image is an exact copy of the rendered result.
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.