File extension information resource. Covers all file formats used in Microsoft Windows, Mac OS X, and Unix based operating systems.
Extensive collection of lists and information on file extensions for different platforms.
Comprehensive source for information about digital file formats. With file converters, tools, tips and tricks, and resource links.
Online source for information about text, data, image, audio, video, web, system, plugin, executable, encrypted, backup, and game file formats or extensions.
Online filename extension database with answers to typically asked questions about file extensions.
Serves as a guide to identifying or knowing what a particular file format is.
Offers detailed information on various kinds of files or data formats and presents links to free programs that can open them.
File and data format resource for programmers. Presents specifications, examples, and references.