Data File Formats and Their File Extensions
Ever encounter a file extension you've never seen before? Check this page for more 3,700 data formats and their corresponding file extensions.
Webopedia's Guide to File Formats and File Extensions
In the list below, search for a file extension by the letter it starts with or you can view the complete list of more than 3,700 file extensions.
|Number Symbol A B C D E F G H I J K
L M N O P Q R S T U V W X Y Z Full List
Data Files Related Terminology
The following data files and formats glossary will help you to better understand how files are stored and are accessed on your computer.
What is a File Format?
File format is a format for encoding information in a file. Each different type of file has a different file format. The file format specifies first whether the file is a binary or ASCII file, and second, how the information is organized.
What is a Filename?
All files have names. The name if a file is its filename. Different operating systems impose different restrictions on filenames. Most operating systems, for example, prohibit the use of certain characters in a filename and impose a limit on the length of a filename. In addition, many systems allow a filename extension that consists of one or more characters following the proper filename. The file extension usually indicates what type of file it is.
What is a File Extension?
File extension is one or several letters at the end of a filename. Filename extensions usually follow a period (dot) and indicate the type of information stored in the file. For example, in the filename EDIT.COM, the extension is COM, which indicates that the file is a command file. Depending on the operating system, the punctuation separating the extension from the rest of the filename may or may not be considered part of the extension itself.
What is a Pathname?
The pathname is a sequence of symbols and names that identifies a file. Every file has a name, called a filename, so the simplest type of pathname is just a filename. If you specify a filename as the pathname, the operating system looks for that file in your current working directory. However, if the file resides in a different directory, you must tell the operating system how to find that directory. You do this by specifying a path that the operating system must follow.
Editor's Recommendation: See Webopedia's Data Formats category for related terms and their definitions.
Stay up to date on the latest developments in Internet terminology with a free weekly newsletter from Webopedia. Join to subscribe now.
From cute electronic toys to VR gaming, here are 5 hot gifts to give to your special tech enthusiast this holiday season. Read More »What's Hot in Tech: AI Tops the List
Like everything in technology, AI touches on so many other trends, like self-driving cars and automation, and Big Data and the Internet of Things... Read More »DevOp's Role in Application Security
As organizations rush to release new applications, security appears to be getting short shrift. DevSecOps is a new approach that holds promise. Read More »
Java is a high-level programming language. This guide describes the basics of Java, providing an overview of syntax, variables, data types and... Read More »Java Basics, Part 2
This second Study Guide describes the basics of Java, providing an overview of operators, modifiers and control Structures. Read More »The 7 Layers of the OSI Model
The Open System Interconnection (OSI) model defines a networking framework to implement protocols in seven layers. Use this handy guide to compare... Read More »