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File Extensions

Browse file extensions by category or letter. Learn what each file type is used for and find software that can open, view, edit, or convert it.

441
Indexed file extensions

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Use this directory to look up file formats, understand what files are used for, and find compatible applications for Windows, macOS, Linux, mobile, and online tools.

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441 extensions
.MRZ

Machine Readable Zone Data

The MRZ (Machine Readable Zone) file format is a specialized data structure used primarily in identity documents such as passports, vi…

Data
.GPP

Group Policy Preferences Configuration File

The GPP file extension is primarily associated with Group Policy Preferences, a feature introduced in Windows Server 2008 to extend th…

Data
.GB2312

GB2312 Character Encoding

GB2312, officially known as GB2312-80, is a character set and encoding standard for Simplified Chinese characters, primarily used in t…

Data
.N3

Notation3 RDF Document

Notation3 (N3) is a shorthand non-XML serialization of Resource Description Framework (RDF) models, designed with human-readability in…

Data
.2027

Unknown or Non-Standard File Format

The '2027' file extension is not a recognized or standardized file format in the computing industry. It does not correspond to any wid…

Data
.GSP

Geometer's Sketchpad Document

A GSP file is a document created by Geometer's Sketchpad, a leading interactive geometry software program used widely in mathematics e…

Data
.PRT

Siemens NX Part File

A PRT file is a 3D model or part file created with Siemens NX, a high-end computer-aided design (CAD), computer-aided manufacturing (C…

Data
.CATPART

CATIA Part Document

The CATPART file format is a proprietary 3D CAD (Computer-Aided Design) file format developed by Dassault Systèmes for use with their…

Data
.CCQ

Creative Choice Questionnaire Data File

The CCQ file extension is primarily associated with questionnaire and survey data files generated by specialized evaluation, assessmen…

Data
.MRZ

Machine Readable Zone Data

The MRZ (Machine Readable Zone) file format is a specialized data structure used primarily in identity documents such as passports, visas, and national ID card…

Data
.GPP

Group Policy Preferences Configuration File

The GPP file extension is primarily associated with Group Policy Preferences, a feature introduced in Windows Server 2008 to extend the capabilities of Group P…

Data
.GB2312

GB2312 Character Encoding

GB2312, officially known as GB2312-80, is a character set and encoding standard for Simplified Chinese characters, primarily used in the People's Republic of C…

Data
.N3

Notation3 RDF Document

Notation3 (N3) is a shorthand non-XML serialization of Resource Description Framework (RDF) models, designed with human-readability in mind. It is a text-based…

Data
.2027

Unknown or Non-Standard File Format

The '2027' file extension is not a recognized or standardized file format in the computing industry. It does not correspond to any widely used software, operat…

Data
.GSP

Geometer's Sketchpad Document

A GSP file is a document created by Geometer's Sketchpad, a leading interactive geometry software program used widely in mathematics education. This file forma…

Data
.PRT

Siemens NX Part File

A PRT file is a 3D model or part file created with Siemens NX, a high-end computer-aided design (CAD), computer-aided manufacturing (CAM), and computer-aided e…

Data
.CATPART

CATIA Part Document

The CATPART file format is a proprietary 3D CAD (Computer-Aided Design) file format developed by Dassault Systèmes for use with their CATIA software suite. It…

Data
.CCQ

Creative Choice Questionnaire Data File

The CCQ file extension is primarily associated with questionnaire and survey data files generated by specialized evaluation, assessment, and analytical softwar…

Data

Frequently Asked Questions

Everything you need to know about file extensions

You can search by entering a file extension directly in the search bar or browse the directory by category or alphabetical index.

Each listing provides a definition of the file extension, common use cases, compatible software, supported platforms, and related or alternative formats.

The database is updated regularly to reflect new file extensions, changes in software compatibility, and evolving file format standards.