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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.

24
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.

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24 extensions
Letter: R Clear all
.RAF

Fujifilm RAW Image File

RAF files are RAW image files created by Fujifilm digital cameras. RAW image files contain minimally processed data from the camera's…

Image
.RAR

Roshal Archive

The RAR (Roshal Archive) file format is a proprietary archive file format that supports data compression, error recovery, and file spa…

Archive
.RAW

Raw Image Format

A RAW image file contains minimally processed data from the image sensor of a digital camera, image scanner, or motion picture film sc…

Image
.RCFILE

Resource Configuration File

An RCFILE is a configuration file used by various applications, particularly in Unix-like operating systems. The 'rc' suffix is a hist…

Data
.RDATA

R Data Workspace File

The RData file format is the native binary format used by the R programming language, a widely utilized environment for statistical co…

Data
.RDF

Resource Description Framework File

The RDF (Resource Description Framework) file extension represents a metadata file format used to store information about resources on…

Data
.RDLC

Report Definition Language Client-side

The RDLC file format stands for Report Definition Language Client-side. It is an XML-based file format developed by Microsoft, specifi…

Data
.RDS

R Data Serialization

The RDS file format is a proprietary binary format used by the R programming language to store a single R object. Unlike other formats…

Data
.REG

Registry Entries

A .reg file is a text-based file format used by Microsoft Windows to store and import registry settings. The Windows Registry is a hie…

Data
.RF64

RIFF 64-bit Format

The RF64 file format is a multichannel audio file format developed by the European Broadcasting Union (EBU) to overcome the 4GB file s…

Audio
.RFA

Revit Family File

An RFA file is a Revit Family file. Revit is a Building Information Modeling (BIM) software used by architects, engineers, and constru…

Data
.RGN

Garmin Region File

A .rgn file is primarily associated with Garmin GPS devices and is used to store region-specific data, most commonly for firmware upda…

Data
.RKT

Racket Source Code File

The .rkt file extension is used for source code files written in Racket, a general-purpose, multi-paradigm programming language that b…

Programming
.RMD

R Markdown Document

An Rmd file is an R Markdown document, which is a plain text file that combines Markdown formatting with embedded R code chunks. This…

Programming
.RMI

RIFF MIDI File

A RIFF MIDI (RMI) file is a type of audio file that encapsulates standard MIDI (Musical Instrument Digital Interface) data within a RI…

Audio
.RNW

Sweave Source File

An RNW file is a source document used for literate programming, specifically within the R statistical computing environment. It combin…

Programming
.RPM

RPM Package Manager

RPM (originally Red Hat Package Manager, now a recursive acronym) is a package management system. RPM files are used to distribute sof…

Archive
.RPP

REAPER Project File

The RPP file extension is primarily associated with REAPER (Rapid Environment for Audio Production, Engineering, and Recording), a com…

Audio
.RPT

Crystal Reports File

An RPT file is a report file most commonly associated with SAP Crystal Reports, a business intelligence application used to design and…

Data
.RST

reStructuredText Document

reStructuredText (RST, ReST, or reST) is a plain text markup syntax similar to Markdown. It is primarily used for technical documentat…

Data
.RTF

Rich Text Format

Rich Text Format (RTF) is a proprietary document file format developed by Microsoft in 1987 for cross-platform document interchange. I…

Document
.RTTTL

Ring Tone Text Transfer Language

RTTTL, which stands for Ring Tone Text Transfer Language, is a simple text-based format developed by Nokia to specify ringtones for it…

Audio
.RVT

Autodesk Revit Project

The RVT file extension is associated with Autodesk Revit, a Building Information Modeling (BIM) software used extensively in the archi…

Data
.RW2

Panasonic RAW Image File

RW2 is a RAW image format used by Panasonic digital cameras. RAW image files contain minimally processed data from the image sensor of…

Image
.RAF

Fujifilm RAW Image File

RAF files are RAW image files created by Fujifilm digital cameras. RAW image files contain minimally processed data from the camera's sensor, preserving as muc…

Image
.RAR

Roshal Archive

The RAR (Roshal Archive) file format is a proprietary archive file format that supports data compression, error recovery, and file spanning. The 'part1.rar' na…

Archive
.RAW

Raw Image Format

A RAW image file contains minimally processed data from the image sensor of a digital camera, image scanner, or motion picture film scanner. RAW files are name…

Image
.RCFILE

Resource Configuration File

An RCFILE is a configuration file used by various applications, particularly in Unix-like operating systems. The 'rc' suffix is a historical convention, often…

Data
.RDATA

R Data Workspace File

The RData file format is the native binary format used by the R programming language, a widely utilized environment for statistical computing and graphics. The…

Data
.RDF

Resource Description Framework File

The RDF (Resource Description Framework) file extension represents a metadata file format used to store information about resources on the web. Developed by th…

Data
.RDLC

Report Definition Language Client-side

The RDLC file format stands for Report Definition Language Client-side. It is an XML-based file format developed by Microsoft, specifically designed for use wi…

Data
.RDS

R Data Serialization

The RDS file format is a proprietary binary format used by the R programming language to store a single R object. Unlike other formats that might save an entir…

Data
.REG

Registry Entries

A .reg file is a text-based file format used by Microsoft Windows to store and import registry settings. The Windows Registry is a hierarchical database that s…

Data
.RF64

RIFF 64-bit Format

The RF64 file format is a multichannel audio file format developed by the European Broadcasting Union (EBU) to overcome the 4GB file size limitation inherent i…

Audio
.RFA

Revit Family File

An RFA file is a Revit Family file. Revit is a Building Information Modeling (BIM) software used by architects, engineers, and construction professionals to de…

Data
.RGN

Garmin Region File

A .rgn file is primarily associated with Garmin GPS devices and is used to store region-specific data, most commonly for firmware updates or map segments. Thes…

Data
.RKT

Racket Source Code File

The .rkt file extension is used for source code files written in Racket, a general-purpose, multi-paradigm programming language that belongs to the Lisp-Scheme…

Programming
.RMD

R Markdown Document

An Rmd file is an R Markdown document, which is a plain text file that combines Markdown formatting with embedded R code chunks. This format is primarily used…

Programming
.RMI

RIFF MIDI File

A RIFF MIDI (RMI) file is a type of audio file that encapsulates standard MIDI (Musical Instrument Digital Interface) data within a RIFF (Resource Interchange…

Audio
.RNW

Sweave Source File

An RNW file is a source document used for literate programming, specifically within the R statistical computing environment. It combines LaTeX documentation wi…

Programming
.RPM

RPM Package Manager

RPM (originally Red Hat Package Manager, now a recursive acronym) is a package management system. RPM files are used to distribute software on Linux and other…

Archive
.RPP

REAPER Project File

The RPP file extension is primarily associated with REAPER (Rapid Environment for Audio Production, Engineering, and Recording), a comprehensive digital audio…

Audio
.RPT

Crystal Reports File

An RPT file is a report file most commonly associated with SAP Crystal Reports, a business intelligence application used to design and generate reports from a…

Data
.RST

reStructuredText Document

reStructuredText (RST, ReST, or reST) is a plain text markup syntax similar to Markdown. It is primarily used for technical documentation, software documentati…

Data
.RTF

Rich Text Format

Rich Text Format (RTF) is a proprietary document file format developed by Microsoft in 1987 for cross-platform document interchange. It\'s designed to be a rel…

Document
.RTTTL

Ring Tone Text Transfer Language

RTTTL, which stands for Ring Tone Text Transfer Language, is a simple text-based format developed by Nokia to specify ringtones for its mobile phones. It was t…

Audio
.RVT

Autodesk Revit Project

The RVT file extension is associated with Autodesk Revit, a Building Information Modeling (BIM) software used extensively in the architecture, engineering, and…

Data
.RW2

Panasonic RAW Image File

RW2 is a RAW image format used by Panasonic digital cameras. RAW image files contain minimally processed data from the image sensor of a digital camera. This m…

Image

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.