If you are trying to open an SLDPRT file in Fusion 360, the practical question is not whether the file is a part. It is how quickly you can turn that SolidWorks source into something Fusion can insert cleanly, without an awkward manual round trip.
A CADExchange-based workflow solves that by converting the part to STEP and inserting the result from inside Fusion. That keeps the part-import flow consistent and removes the need to hand-manage intermediate exports.
1. The Fastest Repeatable Workflow
- Install the Fusion 360 add-in.
- Sign in with your CADExchange account from the command dialog.
- Select the .sldprt file.
- Run the conversion and let the add-in insert the returned STEP.
2. Why STEP Is the Right Bridge
The add-in is built around converting SolidWorks files to STEP first. That matters because STEP is a safer CAD exchange format for model handoff than trying to preserve a SolidWorks-native assumption all the way through a Fusion workflow.
If you need the format rationale, compare STEP vs IGES for manufacturing.
3. After the Part Lands in Fusion
- Check orientation and units in the active design.
- Validate major faces and mounting geometry before you commit downstream edits.
- Keep the original SolidWorks file for traceability if you later need to re-run the import.
4. When a Browser Upload Still Makes Sense
The browser converter is still useful when you are triaging files outside CAD, sharing downloads, or just want a quick web upload. But if your real goal is to use the file inside Fusion, the add-in removes a lot of repetitive handoff friction.
For the full in-Fusion story, read the SolidWorks add-in guide. If your source is an assembly instead of a part, jump to the SLDASM import guide.