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Details of extension .ismx

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

Below, you can find answers to the following questions:

  • What is the .ismx file?
  • Which program can create the .ismx file?
  • Where can you find a description of the .ismx format?
  • What can convert .ismx files to a different format?
  • Which MIME-type is associated with the .ismx extension?
Microsoft Expression Encoder Index .ismx file icon

Microsoft Expression Encoder Index

The ISMX file is a Microsoft Expression Encoder Index. Microsoft Expression Encoder is a transcoding and non-linear video editing software application for Microsoft Windows. The .ismx file is an index of the MPEG-2 TS files, and the .ism file is a standard Smooth Streaming SMIL 2.0-compliant server manifest that is used by the on-demand Smooth Streaming module.
Category: Multimedia files
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
.exprwdxsl Microsoft Expression Web XSLT Data
.exprwdnav Microsoft Expression Web Navigation Data
.xej Microsoft Expression Encoder Job
.exprwdjs Microsoft Expression Web Javascript
.ts MPEG-2 Transport Stream

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

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

.smx IBM Rational XDE SMX Data
.imx DaVis IMX Image Data
.isx Intrasis Object File
.isma IIS Smooth Streaming Audio
.ismc IIS Smooth Streaming Client Manifest Data
.ism Synergy/DE Data Index

The .ismx filename extension is often given incorrectly!

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

isx (1), isma (1), imx (1), smx (1), ismc (1), ism (1)

Can't open a .ismx file?

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

Windows can't open this file:

File: example.ismx

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