Convert STP to PNG
Convert STP to PNG online: the 3D part drawn as a see-through isometric wireframe, saved as a lossless PNG. Free, no sign-up.
Drop your STP 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 STP files
Drag and drop or select STP files from your device. You can upload multiple files at once.
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Configure Output
Choose any available PNG output options, then start the conversion.
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Download PNG files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert STP to PNG?
STP is the common .stp extension of STEP (ISO 10303), the standard format for exchanging solid 3D models between CAD and manufacturing software. Every edge of the model, front and back, is projected into an isometric view and drawn as dark lines on a white background, giving a clear wireframe of the part.
PNG keeps every pixel exactly as rendered, so text, thin lines and flat colours stay crisp, and transparency is preserved.
Frequently Asked Questions
How do I convert STP to PNG?
Drop your STP file above and press Convert. Our servers open the STP model with FreeCAD, trace every edge into an isometric line drawing, and render it through a PDF page into the image you chose. The result is saved as a lossless PNG, ready to download.
Are hidden edges of the STP part shown in the PNG?
Yes. The drawing is a see-through wireframe, so edges at the back of the part are drawn along with the visible ones, which reveals holes and pockets on every side.
Does a STP assembly with several bodies come through in the PNG?
Yes. FreeCAD reads the file's complete shape, so every body it contains is drawn together in the same isometric view.
What happens when a STP file fills several PNG pages?
Each page is rendered at 144 dpi and saved as its own PNG image, named page-1, page-2 and so on, and they download together as one ZIP. A single page downloads as one PNG file.
Why is PNG a good fit for a STP conversion?
PNG is lossless: the image keeps every rendered pixel with no compression artefacts, which keeps small text, table lines and drawings perfectly sharp.
Is my .stp 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.