PROJ file format description

Many people share .proj files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .proj file can be edited, converted or printed with. On this page, we try to provide assistance for handling .proj files.

3 filename extension(s) found in our database.

.proj - Poseidon for UML Project Information

The PROJ data files are related to Poseidon for UML. The PROJ file is a Poseidon for UML Project Information. Poseidon for UML is a software application used to create models with the Unified Modeling Language.

Application:

Poseidon for UML

Category:

Data files

Mime-type:

application/octet-stream

Magic:

- / -

Aliases:

Poseidon for UML Project Information related extensions:

.xvg: Grace Document
.pgn: Portable Game Notation Data
.pvb: VirtualBoss PocketPC Data FIle
.rtn: Carlson Survey Road Network File
.cdf: Affymetrix Chip Description File
.ho: Knowledge Explorer Hierarchy Outline

.proj - Insight II NMR Project

The PROJ project files are related to Insight II. The PROJ file is an Insight II NMR Project. Insight II is a comprehensive graphic molecular modeling program.

Application:

Insight II

Category:

Project files

Mime-type:

application/octet-stream

Magic:

- / -

Aliases:

Insight II NMR Project related extensions:

.tbp: Tekla BIMsight Project
.mmp: Gammadyne Mailer Project
.apt: appTranslator Project
.mpj: STOIK MorphMan Project
.ach: RSLogix 5 Project
.mpz: SignIQ Project

.proj - L3DT Project

The PROJ project files are related to L3DT. The PROJ file is an L3DT Project. L3DT is a Windows application for generating terrain maps and textures. It is intended to help game developers and digital artists create vast high-quality 3D worlds.

Application:

L3DT

Category:

Project files

Mime-type:

application/octet-stream

Magic:

- / -

Aliases:

L3DT Project related extensions:

.amf: L3DT Attributes Map Data
.hf2: L3DT Compressed Heightfield Data
.hff: L3DT Heightfield Data

Naturally, other applications may also use the .proj file extension. Even harmful programs can create .proj files. Be especially cautious with .proj files coming from an unknown source!

Can't open a .proj file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:

example.proj

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

Open Control Panel > Control Panel Home > Default Programs > Set Associations.
Select a file type in the list and click Change Program.

The .proj file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

prj, pro

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

.pro: ALEID2000 Project
.pro: AquaCrop Single Project
.pro: PATCHMASTER Protocol Editor Information
.pro: Chord Pro Chord
.pro: KiCad Project File
.pro: FEMFAT Result Protocol Data

Operating systems

DataTypes.net currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

If you find the information on this page useful, please feel free to link to this page.

https://datatypes.net/open-proj-files

If you have useful information about the .proj file format, then write to us!