STEP File Viewer: STP & IGES

STEP File Viewer opens STEP, STP and IGES CAD files right on your Android phone. Tap a .step file in your email, WhatsApp, Drive or file manager and see the model in 3D in a few seconds. No account, no upload, no desktop CAD needed.

OPEN STEP FILES ON YOUR PHONE
• Opens .step, .stp, .iges and .igs files, plus .brep and .stl
• Real CAD geometry, read by the OpenCascade engine on your own device
• Assemblies open with every part in its own colour, so you can see how the pieces fit together
• Colours saved in the file are kept
• Rotate, zoom and pan with your fingers
• Recent files, so the model you had open is back when you return

KNOW THE SIZE BEFORE YOU PRINT
• Exact width, depth and height in millimetres or inches, always on screen
• Print preview checks whether the part fits your 3D printer bed, with common printers built in
• Scale it and see every figure update, just like in a slicer
• Filament estimate: weight, length, cost and a rough print time for PLA, PETG, ABS and more

SEE IT IN YOUR ROOM
• View the model in augmented reality at its true size on your desk or floor, through Google's Scene Viewer (on phones that support ARCore)

MAKE IT YOURS
• Light or dark: 13 background colours, or mix your own
• Auto rotate for a hands free look at the whole part
• Pro adds studio lighting, environments, exposure and shadow control

GOOD FOR
Engineers and designers checking a part away from the desk. Makers and 3D printing hobbyists deciding whether a download will fit their printer. Students opening CAD homework. Machinists and buyers looking at a drawing a supplier sent over. Anyone who got a .step file and has no CAD software on hand.

PRIVATE AND OFFLINE
Your CAD files never leave your phone. The conversion runs entirely on your device, and nothing you open is uploaded anywhere.

FREE WITH ADS
Everything above is free. A one time Remove Ads purchase takes away every ad and unlocks the Pro lighting.

Recent changes:
Opens faster.