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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.

3
Indexed file extensions
Popular searches:
.DOCX .7Z .AUTOCAD (DWG, DXF) .PDF .TXT .OBJ (.OBJ)

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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.

Search by extension Enter extensions like PDF, APK, DAT, HEIC, ZIP, or DOCX.
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3 extensions
Programming Letter: R Clear all
.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
.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
.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
.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

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.