The File Format Database

Search over 10,000 file extensions and software programs.

Drop your file to view details

File Type of the Day

Today • July 2


Cue Sheet File

A CUE file is a text file that defines the way tracks are organized on compact discs and super-audio CDs (SACDs). It may contain the song name, performer, and length of each track on the disc.

July 1


Mac App Store Partially Downloaded App

An APPDOWNLOAD file is a file created by App Store, a program included with Mac OS X 10.6.6 or later that allows users to purchase macOS (OS X) software. It saves the contents of a purchased .APP file as it's being downloaded from the store.

June 30


Tagged Image File Format

A TIFF file is a graphics container that stores raster images in the Tagged Image File Format (TIFF). It contains high-quality graphics that support color depths from 1 to 24-bit and supports both lossy and lossless compression.

Universal File Viewers

Open your files with one of the file viewing utilities recommended by

About contains a searchable database of over 10,000 file extensions with detailed information about the associated file types. You can look up information about unknown file types and find programs that open the files. Learn more about

Recent Updates