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The File Extension Library

What is a file extension?

Short answer: it's the set of letters after the period (.) in the name of a file.

Long answer: File extensions signify the file format of a file. It tells the operating system (OS) how data was stored in the file. Not all OS, require a file extension though. For instance, this is optional in Unix, but is mandatory with MS-DOS and Windows systems.

In most file formats the file type is actually defined by the contents (first bytes, file structure), but extensions are used to define the application that is used for opening the file.

Below is a detailed database of thousands of file extensions our team has compiled for you. Feel free to browse!


Browse all Extensions:
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YCT - Extension Details
Date Added: January 01, 1970
File Extension:  .YCT
Description 1: .YCT is an extension related to YahELite Chat Transcript. YahELite shields and protects users from "text floods, "boot codes, "spam, "sound bombs, "unwanted PMs and other forms of chat mischief. The YahELite chat transcripts are much like the RTF format, they include a background color tag at the start of the .YCT files.
File Type:   Text file
Mode: ASCII
Program(s) to Open:  YahELite Chat Transcript
Common:
Extension: