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.
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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The FNA file extension represents a FASTA Nucleic Acid file, which is a specialized text-based format widely utilized in the fields of…
The GDB file extension is most commonly associated with the Esri File Geodatabase, a spatial data storage format developed by Esri for…
GB18030 is a Chinese national standard and the official character set for the People's Republic of China. It is a variable-length char…
The PMS file extension is primarily associated with Primavera Project Planner, a sophisticated project management software suite devel…
The HRM file extension is a data format primarily associated with Polar Electro heart rate monitors and their legacy training software…
The OTP file extension stands for OpenDocument Presentation Template. It is an XML-based file format used for creating presentation te…
The .sc2assets file extension is a proprietary data format developed by Blizzard Entertainment specifically for use with the StarCraft…
The IGC file format is a standardized data format used primarily in the aviation industry, specifically for gliding, paragliding, and…
A file with the LST extension is typically a plain text file that contains a list of information. Because it is saved in a standard te…
An AMC (Acclaim Motion Capture) file is a specialized data file format used to store 3D motion capture animation data. Originally deve…
A file with the .state extension is typically a Saved State file used by various software applications, most notably video game emulat…
A SAS7BCAT file is a SAS Catalog file created by SAS (Statistical Analysis System) software, starting with version 7. Unlike SAS7BDAT…
An ADM file is a Group Policy Administrative Template used by Microsoft Windows operating systems to define registry-based policy sett…
The GeoPackage (GPKG) file format is an open, non-proprietary, standards-based, and platform-independent container designed for geogra…
A DOCM file is a macro-enabled document created by Microsoft Word, the widely used word processing application. Introduced with the re…
The ENEX file format, which stands for Evernote Export, is a proprietary XML-based format developed by Evernote Corporation to facilit…
UTF-16 (16-bit Unicode Transformation Format) is a character encoding capable of encoding all 1,112,064 valid character code points of…
The GGB file format is the native file format used by GeoGebra, an interactive geometry, algebra, statistics, and calculus application…
A GGT file is a GeoGebra Tool template file created and used by GeoGebra, an interactive mathematics software suite designed for scien…
Big5 is a character encoding standard used for Traditional Chinese characters, predominantly in Taiwan, Hong Kong, and Macau. Develope…
An XLTM file is a macro-enabled template created by Microsoft Excel, the industry-standard spreadsheet application. Introduced with th…
The QUAL file format is a text-based format used in bioinformatics to store quality scores for DNA sequences, typically complementing…
The FOF file extension, standing for 'File of Files' or 'Folders of Files,' is primarily used as a manifest or index file in specializ…
The PCAP (Packet Capture) file format is a standardized application programming interface and file format used for capturing and recor…
The FNA file extension represents a FASTA Nucleic Acid file, which is a specialized text-based format widely utilized in the fields of bioinformatics and molec…
The GDB file extension is most commonly associated with the Esri File Geodatabase, a spatial data storage format developed by Esri for its ArcGIS suite of soft…
GB18030 is a Chinese national standard and the official character set for the People's Republic of China. It is a variable-length character encoding that provi…
The PMS file extension is primarily associated with Primavera Project Planner, a sophisticated project management software suite developed by Oracle. This file…
The HRM file extension is a data format primarily associated with Polar Electro heart rate monitors and their legacy training software, such as Polar ProTrain…
The OTP file extension stands for OpenDocument Presentation Template. It is an XML-based file format used for creating presentation templates that serve as a b…
The .sc2assets file extension is a proprietary data format developed by Blizzard Entertainment specifically for use with the StarCraft II: Wings of Liberty gam…
The IGC file format is a standardized data format used primarily in the aviation industry, specifically for gliding, paragliding, and hang gliding. It was deve…
A file with the LST extension is typically a plain text file that contains a list of information. Because it is saved in a standard text format, it can be open…
An AMC (Acclaim Motion Capture) file is a specialized data file format used to store 3D motion capture animation data. Originally developed by Acclaim Entertai…
A file with the .state extension is typically a Saved State file used by various software applications, most notably video game emulators (such as PCSX2, Retro…
A SAS7BCAT file is a SAS Catalog file created by SAS (Statistical Analysis System) software, starting with version 7. Unlike SAS7BDAT files which contain actua…
An ADM file is a Group Policy Administrative Template used by Microsoft Windows operating systems to define registry-based policy settings. These files contain…
The GeoPackage (GPKG) file format is an open, non-proprietary, standards-based, and platform-independent container designed for geographic information system (…
A DOCM file is a macro-enabled document created by Microsoft Word, the widely used word processing application. Introduced with the release of Microsoft Office…
The ENEX file format, which stands for Evernote Export, is a proprietary XML-based format developed by Evernote Corporation to facilitate the migration and bac…
UTF-16 (16-bit Unicode Transformation Format) is a character encoding capable of encoding all 1,112,064 valid character code points of Unicode. It uses one or…
The GGB file format is the native file format used by GeoGebra, an interactive geometry, algebra, statistics, and calculus application intended for learning an…
A GGT file is a GeoGebra Tool template file created and used by GeoGebra, an interactive mathematics software suite designed for science, technology, engineeri…
Big5 is a character encoding standard used for Traditional Chinese characters, predominantly in Taiwan, Hong Kong, and Macau. Developed in the mid-1980s by a c…
An XLTM file is a macro-enabled template created by Microsoft Excel, the industry-standard spreadsheet application. Introduced with the Office Open XML (OOXML)…
The QUAL file format is a text-based format used in bioinformatics to store quality scores for DNA sequences, typically complementing a corresponding FASTA fil…
The FOF file extension, standing for 'File of Files' or 'Folders of Files,' is primarily used as a manifest or index file in specialized data processing enviro…
The PCAP (Packet Capture) file format is a standardized application programming interface and file format used for capturing and recording network traffic. It…
Everything you need to know about file extensions