STEP / STP / IGES Viewer troubleshooting: formats, blank results, and compatibility
Use this checklist when STEP / STP / IGES Viewer shows an empty result, missing content, or a format error.
Identify the type of problem
STEP and IGES are widely used to exchange mechanical and manufacturing models. OpenCascade WebAssembly triangulates the B-Rep locally for interactive viewing.
Most issues fall into three groups: the file cannot be read, the file opens but some content is missing, or the result is valid but needs manual cleanup. Note the extension, source, and whether the file is protected before troubleshooting.
Troubleshooting order
- Confirm that the extension is supported; do not rely on the filename alone.
- Copy the file to a trusted local folder and check that it opens without corruption.
- Try a smaller, simpler sample to separate file complexity from browser conditions.
- Refresh the page or use an up-to-date Chrome, Edge, or Safari browser.
- Keep the original file safe and never overwrite it with an incomplete result.
Why can content be missing?
Large assemblies can use substantial browser memory Preview only; verify manufacturing dimensions in professional CAD software
For print accuracy, design delivery, engineering review, or legal archiving, use this viewer for a quick check and perform final verification in the professional application.
Privacy and file safety
Only process files you are authorized to use. Close the page on a shared device and remove downloaded results. Do not copy personal data, customer records, or confidential files onto an untrusted device.
When should you use another application?
Use the application that created the file when it has DRM, a password, external references, many embedded resources, or strict layout requirements. For a normal quick preview or extraction, return to the tool and try again.