All about M4U Files

The M4U file type is primarily associated with Ogg Media.

M4U	File extension: M4U
	File type:	Redirector File

What is an M4U file?

M4U files mostly belong to Ogg Media. While non-standard, some use this file type for Ogg Media redirection. Use a text editor to create an .M4U file that contains a single line: the full URL to the .OGM file (e.g., MYVIDEO.M4U contains http://mysite.com/myvideo.ogm as its only entry). Use ASCII mode to upload the .M4U file and binary mode to upload the .OGM file. Be certain the server has application/ogg as the MIME type for the .OGM file extension and video/x-mpegurl for the .M4U file extension. You can then link to the .M4U file with the following HTML code: <a href="myvideo.m4u" type="video/x-mpegurl">Play My Video</a>

How to open an M4U file

You need a suitable software like Ogg Media to open an M4U file. You need a suitable software like Ogg Media to open an M4U file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your M4U file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a M4U file directly in the browser:. Just drag the file onto this browser window and drop it.

Online M4U Text Viewer

Choose your .m4u file to analyze

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.M4U File Won't Open? Here is What You Can Do

Since .M4U files originate from various programs, they aren't universally openable.

Identify the Source: A streaming site download suggests an MPEG-4 playlist, while an Ogg Media workflow implies a video redirector file.
Check the Header: Inspect the first lines in a text editor:
- URLs or file paths indicate a standard media playlist.
- "PK" or other magic bytes imply a compressed archive.
Use the Original Software: The original program is usually required; try VLC media player, Winamp, or Apple QuickTime, or ask the sender if uncertain.
Use this Webpage: Drag and drop your file here to detect the format, extract readable metadata, and preview contents when possible.

Technical Data for M4U File Extension

Related files:

m3u, m4a, wvx

Mime type:

video/x-mpegurl

an m4u Redirector File is a special file format and should only be edited and saved with the appropriate software.

How to solve problems with M4U files

Associate the M4U file extension with the correct application.
Update your software that should actually open redirector files. Because only the current version supports the latest M4U file format. Search, therefore, e.g. on the manufacturer website after an available Ogg Media update.
To make sure that your M4U file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
Click here to open your .M4U file online - secure, fast, and no downloads needed.