.PRT File Extension

File Type 1

Creo Parametric Part

Developer PTC
Popularity
3.5  |  50 Votes
Category CAD Files
Format Binary

What is a PRT file?

A PRT file is a part created by PTC Creo Parametric, which is part of the Creo CAD suite. It contains information used to record the part's structure and show it as a 3D model. Creo users often combine PRT files into Creo assembly (.ASM) files.

More Information

Creo Parametric is a CAD program that engineers use to design manufactured parts and assemblies. Engineers can also use Creo to analyze the designs they've created (e.g. test tolerances) and export the designs in formats used by Computer Numerical Control (CNC) machines.

Parts created in Creo Parametric are saved as PRT files. While Creo is the primary application that uses PRT files, some other CAD applications can open them.

NOTE: Creo Parametric was formerly known as Pro/Engineer and Wildfire.

How to open a PRT file

You can open a PRT file in PTC Creo (Windows) or Autodesk Fusion 360 (multiplatform). Note that you can open PRT files in only the Commerical version of Fusion 360; the Personal version does not support PRT files.

How to convert a PRT file

You can use the Commercial version of Autodesk Fusion 360 to convert PRT files to the following formats (and some others):

  • .F3D - Fusion 360 Archive
  • .3MF - 3D Manufacturing File
  • .IPT - Autodesk Inventor Part
  • .FBX - Autodesk FBX Interchange File
  • .OBJ - Wavefront 3D Object
  • .SKP - SketchUp Document
  • .STP - STEP 3D CAD File
  • .STL - Stereolithography File
  • .USDZ - Universal Scene Description Zipped
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Programs that open or reference PRT files

Mac
Windows
Linux
Free Trial
Web
Android
Updated July 21, 2022
File Type 2

Presentations Template

Developer Corel
Popularity
3.5  |  23 Votes
Category Data Files
Format N/A

What is a PRT file?

Presentation template created by Corel Presentations, an application included with Corel WordPerfect Office; saves a slide style and layout that can be used for creating new .SHW presentations.

Programs that open PRT files

Windows
Updated August 18, 2011
File Type 3

Unigraphics Part File

Developer Siemens
Popularity
3.4  |  16 Votes
Category CAD Files
Format Binary

What is a PRT file?

A PRT file is a model part file saved in a three-dimensional model format used by Unigraphics, a 3D CAD program. It contains surface and solid information for a single part. PRT files are saved in a binary format, similar to an Alias wire model and an SDRC (Structural Dynamics Research Corporation) model.

More Information

NOTE: Unigraphics was acquired by Siemens and is now distributed as Siemens NX.

Programs that open PRT files

Mac
Siemens NX
Windows
Siemens NX
Linux
Siemens NX
Updated October 18, 2017
File Type 4

CADKEY Part File

Developer Kubotek
Popularity
3.5  |  15 Votes
Category CAD Files
Format Binary

What is a PRT file?

CAD file created by CADKEY, a program used for designing 2D and 3D parts; contains both the model and drawing layouts; includes model geometry in wireframe, surface, and solids (ACIS based), plus dimensioning, annotation, vector, plane and other entity types in one modeling space.

More Information

The Drawing Layout Mode in CADKEY contains defined views of model geometry for associative dimensioning and annotation, as well as section views. It also allows 2D wireframe geometry creation.

NOTE: KeyCreator, the successor to CADKEY, uses .CKD files to store designs.

Programs that open PRT files

Windows
Kubotek CADKEY
Kubotek Spectrum
Updated May 2, 2013
File Type 5

Solid Edge Part File

Developer Siemens
Popularity
3.1  |  14 Votes
Category CAD Files
Format Binary

What is a PRT file?

3D model created with Solid Edge, a CAD program used primarily for creating industrial parts and assemblies; can be combined with other 3D parts in an assembly (.ASM) file.

Programs that open PRT files

Windows
Updated March 31, 2010
File Type 6

Valve Source Portal File

Developer Valve
Popularity
3.6  |  7 Votes
Category Game Files
Format Text

What is a PRT file?

A PRT file contains portal information used by the Valve Visible Information Set (VVIS) command-line tool included with Hammer Editor, which is a program used to build maps for Valve games such as Half-Life. It stores a list of portals in ASCII format that are used by VVIS to perform visibility calculations to determine which objects on a map can be seen by a player and must be rendered.

More Information
Screenshot of a .prt file in Apple TextEdit 1
PRT file open in Apple TextEdit 1

PRT files are used to optimize maps/levels in Source engine games. The PRT files are generated by VBSP, which is a tool used to compile raw Valve Map .VMF files to the Binary Space Partition (BSP) format so that they can be used in BSP-based game engines. These .BSP maps must be completely "sealed," meaning that they cannot connect to the black infinite area around the map. If the maps are not completely sealed, they will not work properly in the game.

If the level is sealed, then VBSP creates a [mapname].prt file, which is then used by VVIS to calculate the visibility of objects and improve the performance of the map by communicating which objects must be rendered. If there is a "leak" in the map, then VBSP reports it and does not generate the PRT file, which causes VVIS to not perform the visibility calculations.

NOTE: Since PRT files are saved in a text format, you can open them with a text editor, such as Microsoft Notepad or Apple TextEdit. However, you may have to change the .prt file extension to .txt to open it in the text editor.

Common PRT Filenames

[mapname].prt - PRT files are named after the map/level for which they store portal information. An example of a PRT file name is d1_canals_06_d.prt.

Programs that open or reference PRT files

Mac
Included with OS
Windows
Updated April 9, 2019
File Type 7

Printer Driver File

Developer N/A
Popularity
3.2  |  9 Votes
Category System Files
Format N/A

What is a PRT file?

Contains configuration information that allows the computer to communicate with the printer; may be used by certain software programs, such as Dr. Halo software, which saves images in a device-independent format.

Programs that open or reference PRT files

Windows
Referenced by the operating system
Updated April 24, 2007
File Type 8

Printer Output File

Developer N/A
Popularity
3.0  |  6 Votes
Category Text Files
Format N/A

What is a PRT file?

Output from a printing job sent to the printer and saved as a file; contains formatting information that tells the printer how the document should be printed.

More Information

PRT files may be created on Unix systems using the FILEUTIL function with a Filename parameter. They can also be opened by FILEUTIL and printed using the LP (line printer) parameter.

Programs that open or reference PRT files

Windows
Linux
FILEUTIL
Updated December 13, 2018
File Type 9

Crypt Edit Protected Text Format File

Developer PolySoft Solutions
Popularity
2.5  |  8 Votes
Category Text Files
Format Binary

What is a PRT file?

Protected text document created by Crypt Edit, a free program used for word processing; stores an encrypted and password protected document; may contain text, images, and page formatting information; used to securely store documents.

More Information

NOTE: PolySoft Solutions discontinued development for Crypt Edit in 2000.

Programs that open PRT files

Windows
PolySoft Solutions Crypt Edit
Updated April 15, 2010

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