What is an EPRT File?

How to Open, Edit, & Convert EPRT Files

Screenshot of the eDrawings logo
© Dassault Systèmes

A file with the EPRT file extension is an eDrawings file. It contains a representation of a 2D or 3D drawing generated from a CAD program.

EPRT files are typically created so that a 3D drawing can be easily transferred online and viewed for free even by an inexperienced user. The format is not only lightweight but also read-only, which means no changes can be done to the original model.

EDRW and EASM are two other similar eDrawings file formats.

How To Open an EPRT File

EPRT files can be opened on Windows and Mac with the free eDrawings Viewer software.

The eDrawings Viewer program lets you move around the part in a 3D space, zoom, print, run an animation that displays all sides of the drawing, protect the EPRT file with a password, and stamp the drawing with words like final, internal use only, approved, void, preliminary, etc.

SOLIDWORKS from Dassault Systemes will open EPRT files too.

Much of an EPRT file exists in plain text, meaning you could use a text editor like Notepad++ to open it as a text document. However, doing this clearly isn't the route you want to go if you're interested in viewing the 3D model. For that, stick to one of the programs I mentioned above.

Tip: I don't know of any other format that uses the .EPRT file extension, but if your file isn't opening with these programs or you know it's not a drawing file, then try opening it with a text editor.

There's normally some text at the very beginning or end of a file that can help identify what format it's in or what program was used to create it.

If you find that an application on your PC does try to open the EPRT file but it's the wrong application or if you would rather have another installed program open these files, see my How to Change File Associations in Windows tutorial for help.

How To Convert an EPRT File

Note: Most popular file formats, like PDF and MP4, can be converted to other formats with a free file converter tool. But with EPRT files, you'll need to use a program like the two mentioned below.

If you open an EPRT file in eDrawings Viewer, you can use the File > Save As... menu to convert the EPRT file to HTM, BMP, TIF, JPG, PNG, and GIF.

There's also an option for converting the EPRT to EXE (or ZIP with an EXE automatically saved inside it) so that you can send the EPRT file to someone else that doesn't have, or doesn't want to install, an EPRT viewer. The EXE file they get will open the drawing without any other CAD software installed.

The SOLIDWORKS program I linked to above can be used to export the EPRT file to other CAD-related file formats like FBX, OBJ, DWG, and some other similar ones.

As far as I know, there is no way to convert your standard EPRT file to STL unless that option was expressly allowed during the file's creation. See this blog post at SolidSmack for more on this.

Once the EPRT file is in STL format, it can then be converted to SLDPRT via SOLIDWORKS.

More Help with EPRT Files

See Get More Help for information about contacting me on social networks or via email, posting on tech support forums, and more.

Let me know what kinds of problems you're having with opening or using the EPRT file and I'll see what I can do to help.