View all extensions

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.

42
Indexed file extensions

Find the right information for any file extension

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.

Search by extension Enter extensions like PDF, APK, DAT, HEIC, ZIP, or DOCX.
Browse categories Filter by documents, images, videos, archives, data, and more.
Open files safely Check file sources and use trusted software before opening unknown files.

Filter extensions

Refine your search with categories and letters

42 extensions
Letter: T Clear all
.TMP

Temporary File

A .tmp file is a generic temporary file created by various programs and operating systems. These files are used to hold data temporari…

Data
.TOML

Tom's Obvious, Minimal Language

TOML is a configuration file format that is easy to read due to its simple syntax. It is designed to be easily parsed into data struct…

Data
.TOPOJSON

TopoJSON

TopoJSON is an extension of GeoJSON that encodes topology. Rather than representing geometries as independent sets of coordinates, Top…

Data
.TORRENT

BitTorrent File

A .torrent file is a metadata file used by the BitTorrent protocol. It doesn't contain the actual data being shared, but rather inform…

Data
.TPL

Smarty Template File

A .tpl file is a template file used by the Smarty templating engine, a popular PHP web template system. These files contain a mix of H…

Programming
.TRBP

Trombone Champ Chart File

The TRBP file extension is a specialized data format primarily associated with Trombone Champ, a rhythm-based music game developed by…

Data
.TRC

Trace File

A TRC file is a diagnostic trace file used primarily by database management systems and various software applications to record intern…

Data
.TRDP

Telerik Report Definition Package

The TRDP file format is a proprietary file format developed by Progress Software for use with the Telerik Reporting engine. It is a co…

Data
.TRDX

Telerik Report Definition XML

The TRDX file format is a proprietary XML-based file format developed by Progress Software for use with Telerik Reporting. It serves a…

Data
.TRN

TRN

TRN files are typically associated with training data used in machine learning and artificial intelligence applications. These files c…

Data
.TS

MPEG Transport Stream

The .ts file extension represents a Transport Stream file, a video stream format primarily used for storing and transmitting video, au…

Video
.TSV

Tab-Separated Values

A TSV (Tab-Separated Values) file is a simple text-based format for storing tabular data, such as spreadsheet or database information…

Data
.TSX

TypeScript JSX

A .tsx file is a TypeScript file that includes JSX syntax. TypeScript is a superset of JavaScript that adds static typing to the langu…

Programming
.TTF

TrueType Font

The .ttf file extension represents a TrueType Font file. TrueType is a font standard developed by Apple and Microsoft in the late 1980…

Data
.TTML

Timed Text Markup Language

TTML (Timed Text Markup Language) is an XML-based text format designed for representing timed text information. It's primarily used fo…

Data
.TTS

Text-to-Speech Voice File

The .tts file extension is commonly associated with text-to-speech (TTS) voice files. These files typically contain pre-recorded audio…

Audio
.TWIG

Twig Template File

Twig is a flexible, fast, and secure template engine for PHP. It's used to separate the presentation logic from the application logic…

Programming
.TXT

Plain Text File

A TXT file is a standard text document that contains unformatted text. It is one of the most basic and universally supported file form…

Document
.TMP

Temporary File

A .tmp file is a generic temporary file created by various programs and operating systems. These files are used to hold data temporarily while a file is being…

Data
.TOML

Tom's Obvious, Minimal Language

TOML is a configuration file format that is easy to read due to its simple syntax. It is designed to be easily parsed into data structures. TOML aims to be min…

Data
.TOPOJSON

TopoJSON

TopoJSON is an extension of GeoJSON that encodes topology. Rather than representing geometries as independent sets of coordinates, TopoJSON geometries are stit…

Data
.TORRENT

BitTorrent File

A .torrent file is a metadata file used by the BitTorrent protocol. It doesn't contain the actual data being shared, but rather information about the files and…

Data
.TPL

Smarty Template File

A .tpl file is a template file used by the Smarty templating engine, a popular PHP web template system. These files contain a mix of HTML, CSS, JavaScript, and…

Programming
.TRBP

Trombone Champ Chart File

The TRBP file extension is a specialized data format primarily associated with Trombone Champ, a rhythm-based music game developed by Holy Wow Studios. These f…

Data
.TRC

Trace File

A TRC file is a diagnostic trace file used primarily by database management systems and various software applications to record internal events, errors, and ex…

Data
.TRDP

Telerik Report Definition Package

The TRDP file format is a proprietary file format developed by Progress Software for use with the Telerik Reporting engine. It is a compressed archive format t…

Data
.TRDX

Telerik Report Definition XML

The TRDX file format is a proprietary XML-based file format developed by Progress Software for use with Telerik Reporting. It serves as a declarative definitio…

Data
.TRN

TRN

TRN files are typically associated with training data used in machine learning and artificial intelligence applications. These files contain datasets used to t…

Data
.TS

MPEG Transport Stream

The .ts file extension represents a Transport Stream file, a video stream format primarily used for storing and transmitting video, audio, and metadata over di…

Video
.TSV

Tab-Separated Values

A TSV (Tab-Separated Values) file is a simple text-based format for storing tabular data, such as spreadsheet or database information. Each line in the file re…

Data
.TSX

TypeScript JSX

A .tsx file is a TypeScript file that includes JSX syntax. TypeScript is a superset of JavaScript that adds static typing to the language. JSX is a syntax exte…

Programming
.TTF

TrueType Font

The .ttf file extension represents a TrueType Font file. TrueType is a font standard developed by Apple and Microsoft in the late 1980s as a competitor to Adob…

Data
.TTML

Timed Text Markup Language

TTML (Timed Text Markup Language) is an XML-based text format designed for representing timed text information. It's primarily used for subtitling and captioni…

Data
.TTS

Text-to-Speech Voice File

The .tts file extension is commonly associated with text-to-speech (TTS) voice files. These files typically contain pre-recorded audio generated from text usin…

Audio
.TWIG

Twig Template File

Twig is a flexible, fast, and secure template engine for PHP. It's used to separate the presentation logic from the application logic in web development. Twig…

Programming
.TXT

Plain Text File

A TXT file is a standard text document that contains unformatted text. It is one of the most basic and universally supported file formats, designed to store se…

Document
Page 2 of 2

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.