FILExt - The File Extension Source

Details for file extension .MP21 are on this page. Because there is no central registry for file extensions and their associated programs there may be multiple entries on this page. And, because there are many (some say over a million) such associations not all may be listed here.

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Windows can't open .MP21 files?
If Windows is unable to open files with the extension .MP21 you may not have the appropriate program installed or, you may have registry errors. To help, we strongly recommend you run this free registry scan.

A search on the file extension you submitted shows 1 record(s). The details for each of these are shown below. The best FILExt can do for you is provide the details we know about. Selecting the information that applies to your particular situation is up to you. Use any hints provided. If the information here is not helpful, FILExt is sorry; but as a research site FILExt cannot provide personal support. If you need further information you might try the research tips on the FILExt Help Me page.

Extension: MP21
Program and/or Extension Function [What's This?]		Company [What's This?]
AXMEDIS MPEG-21 File		AxMediaTech S.R.L.
Specific Notes [What's This?]
AXMEDIS tools for content processing can work with any file (audio, video, images, document, animations, HTML, SMIL, MPEG4, OMA, MXF, etc.). It can also produce MPEG-21; when an object is an MPEG-21 package it has more information of a single image or document, and as cons lost its identity in terms of simple file format. A player is available on the AXMEDIS site. Recommended: Find MP21 errors now.
MIME Type [What's This?]	File Classification [What's This?]	Associated Links [What's This?]
application/AXMEDIS-object		None
Identifying Characters [What's This?]
(None or Unknown)
Program ID [What's This?]
(None or Unknown)
General Notes [What's This?]
(None)
This is record 25779 last modified on 2008-09-22 and created on 2008-09-22.

General Info

• If the extension you are looking for is of the form .??_ the file is likely a compressed file and part of an install routine. When the install program runs it will expand the file and replace the underscore with the proper letter for the file type.
• If the file is sent as an audio file with any three-character extension it may be a dictation file where the extension is the dictator's initials; playable by BCB Voice Systems software (see ??? extension). The file could likewise be a dictation file in TrueSpeech format. Use Windows Sound Recorder and/or Media Player to play these back.
• If the extension you are looking for has a number at the end or is only a number and there were no results consider entering the same extension format using zero or one as some programs produce numbered split files but when the split can be extensive (e.g., .000-.999) only the first entry is in the database.

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