"Is it possible to convert STL files to PRT format while ensuring that all modeling steps are visible throughout the process?"

An STL is just a tessellated surface model. There is no modeling history to see.

What do you mean by „convert”? It isn't possible to fully convert any part to see all features like any part has. You can still save any *.stl as *.prt file immediately open and save. But you will not be able to modify the part.

Is it possible to convert STL files to PRT format while ensuring all modeling steps are visible?

Short Answer: No, it is not directly possible to convert an STL file into a PRT file while retaining the full feature history. STL files are mesh-based (triangular surfaces) and do not store parametric modeling steps, making direct feature reconstruction impossible.

Workaround Solutions:

1. Import & Convert STL to Solid Model (Without Full History)
Open the STL file in CAD software (e.g., SolidWorks, Creo, NX, Fusion 360).
Convert it to a solid body:
Use Mesh to BREP (Fusion 360).
Use "Feature Recognition" (Creo).
Use "Convert to Solid" (SolidWorks).
Save the file as .PRT format.

🚨 Limitation: This only creates a solid model without the original feature tree.

2. Reverse Engineer the STL to a Parametric Model
To regain the modeling history:

Import the STL into Reverse Engineering Software like:
Geomagic Design X
Siemens NX Reverse Engineering
SolidWorks Scan to 3D
Use Auto-Surface or Manual Sketching to recreate features step by step.
Save as .PRT (Creo, NX, or SolidWorks Part format) with an editable history.

🚨 Limitation: Requires manual effort to rebuild features.

Final Verdict:
Direct STL → PRT conversion with feature history? ❌ Not possible.
STL → Solid Model (No feature tree)? ✅ Possible via solid conversion.
STL → Editable PRT with full features? ✅ Possible but requires manual reverse engineering.