Jul 17, 2023 · A file extension or suffix is the group of characters, usually 3-4 in length, after the period in a full file name. Also called a filename extension.

May 15, 2023 · What is a file extension (file format)? In computing, a file extension is a suffix added to the name of a file to indicate the file's layout, in terms of how the data within the file is organized. A …

Sep 7, 2025 · A file extension or file name extension is the ending of a file that helps identify the file type in operating systems such as Microsoft Windows. In Microsoft Windows, the file name extension is a …

Your computer has many different types of files on it, and each one has its own file extension. A file extension is a three- or four-letter identifier found at the end of a file name and following a period.

Nov 27, 2025 · A file extension is a suffix attached to the end of a file name that indicates the file type or format. This often consists of a period followed by a series of letters and is used by operating …

Sep 11, 2024 · In simple terms, a file extension is a label used to identify a file type, while the file type refers to the type of data a file contains. A file extension is the suffix at the end of a filename, such as …

A file extension is a suffix added to a filename that typically follows a period (dot) and is used to identify the file type. For instance, in the filename "document.docx," ".docx" serves as the file extension.

Jun 13, 2025 · A file extension is a suffix added to a filename that indicates the file format and type, typically consisting of 3-4 characters following a period.

Jun 6, 2025 · A file extension is the ending part of a computer file's name. Regardless of whether your job directly requires IT-related knowledge and skills, learning about file extensions can help you gain …

What is a File Extension? A file extension is a three or four-letter code that appears at the end of a filename and indicates the type of file it is. For example, .txt stands for text files, .jpg stands for image …