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Details of extension .f4x

1 extension(s) and 0 alias(es) in our database

Below, you can find answers to the following questions:

  • What is the .f4x file?
  • Which program can create the .f4x file?
  • Where can you find a description of the .f4x format?
  • What can convert .f4x files to a different format?
  • Which MIME-type is associated with the .f4x extension?
Flash MP4 Video Index .f4x file icon

Flash MP4 Video Index

The F4X file is a Flash MP4 Video Index. F4X file contains the location of specific fragments within a stream. The F4V format is based on the format specified by ISO/IEC 14496-12: ISO base media file format.
Category: Multimedia files
Application: Adobe Flash Player
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
.flv Adobe Flash Video File
.f4m Flash Media Manifest File
.bootstrap Flash MP4 Video Bootstrap
.flh Flash High Definition Video
.mp4 Mpeg-4 Video Container

Other types of files may also use the .f4x file extension. If you have helpful information about .f4x extension, write to us!

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

.f4a Adobe Flash MP4 Audio Stream
.ftx Fielded Text Metafile
.fx Microsoft DirectX D3D Effect
.fx4 Fugawi Raster Map
.f4 Gigabyte BIOS Update
.frx Visual FoxPro Report

The .f4x filename extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

v4x (1), fx (1), frx (1), f4a (1), fx4 (1), ftx (1), fex (1), f4 (1)

Can't open a .f4x file?

If you want to open a .f4x file on your computer, you just need to have the appropriate program installed. If the .f4x association isn't set correctly, you may receive the following error message:

Windows can't open this file:

File: example.f4x

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2016/2019/2022, Windows 7, Windows 8, Windows 10, Windows 11, Linux, Mac OS X, macOS, iOS, Android