STEP and STP Viewer

Open STEP or STP files in the browser, select parts, and rotate or zoom the converted model. This STEP viewer produces an approximate mesh; manufacturing dimensions should be checked in the original CAD application.

Viewers by extension

STEP Viewer
STP Viewer

How to open a file

Choose a supported file in the TotalViewer workspace.
Inspect pages, layers, sheets or 3D geometry with zoom and navigation.
Check conversion warnings and compare the preview with the original application.

Supported scope and limits

STEP/STP files: 8 MiB, 100,000 triangles, 300,000 vertices, 128 parts and 16 MiB display data. Conversion: 128 MiB memory and 25 seconds. Mesh measurements are approximate. Check external references, PMI, colours and precise surfaces in the original CAD application.

Detailed compatibility guide (Korean)

Free basic viewing

Open up to three files per day in the same browser without signing in. The count resets at midnight Korea time. Files are processed on your device. File, geometry and memory limits apply to both Free and Pro.

Pro advanced tools

Advanced tools such as search, personal review, measurement and comparison depend on the file format and require Pro. Pro removes the daily file-open limit. Payment does not guarantee file compatibility or accuracy.

File guides are available in your selected language. Workspace controls are currently in Korean.