Windows
Compatible applications
Quick Facts
Basic information about this file format
Extension
.MP4
File Type
MPEG-4 Part 14
Category
Video
Best first step
Use compatible software
Quick Summary
A practical overview of the .mp4 file format
MP4 (MPEG-4 Part 14) is a digital multimedia container format most commonly used to store video and audio, but it can also be used to store subtitles and images. Like most modern container formats, it allows streaming over the Internet. MP4 is a widely supported format, compatible with a vast range…
File extension
.MP4
File type
MPEG-4 Part 14
Category
Video
Recommended action
Open with a trusted compatible app
How to open a .mp4 file
Start with a trusted app that supports this format
- Check the file extension carefully and confirm that the file name really ends with .mp4.
- Use software that supports this file type. If one app does not work, try another compatible program for the same platform.
- Update the application if the file was created by a newer version of the software.
- Scan files from unknown sources before opening them, especially documents, archives, scripts, installers, and executable files.
What is a .mp4 file?
File extension details and usage information
MP4 (MPEG-4 Part 14) is a digital multimedia container format most commonly used to store video and audio, but it can also be used to store subtitles and images. Like most modern container formats, it allows streaming over the Internet. MP4 is a widely supported format, compatible with a vast range of devices and operating systems, making it a popular choice for distributing video content. It uses MPEG-4 compression for video, which provides a good balance between file size and video quality. Audio is typically encoded using AAC (Advanced Audio Coding), but other audio codecs are also supported. The MP4 format is based on the QuickTime File Format (QTFF), but it has been standardized as part of the MPEG-4 specification. Its versatility and widespread compatibility have made it a dominant format for video sharing, streaming, and playback across various platforms, from computers and mobile devices to televisions and gaming consoles. It's also commonly used for storing video recordings from cameras and smartphones.
Software Compatibility
Programs that may open or work with .mp4 files
macOS
Compatible applications
Linux
Compatible applications
Mobile
Mobile applications
Can .mp4 files be converted?
Options for saving or exporting this file to another format
In many cases, a .mp4 file can be converted by opening it in compatible software and using an option such as Save As, Export, or Convert. The available output formats depend on the file type and the application used.
- Use the original software that created the file when possible.
- Check whether the application supports exporting to common formats.
- Be careful with online converters when working with private, business, or sensitive files.
- If conversion fails, the file may be corrupted, incomplete, encrypted, or not actually a .mp4 file.
Why can't I open a .mp4 file?
Common reasons this file type may not open correctly
Wrong software
The file may require a specific program that supports the .mp4 format.
Incorrect extension
The file extension may have been renamed manually, even though the actual file format is different.
Corrupted file
The file may be incomplete, damaged during download, or transferred incorrectly.
Outdated app
Your software may need to be updated before it can open newer versions of this file format.
Frequently Asked Questions
Common questions about .mp4 files
To open a .mp4 file, use software that supports this file format.
- VLC Media Player
- Windows Media Player
- PotPlayer
- MPC-HC
- GOM Player
Open the file in compatible software and look for options such as Save As, Export, or Convert. If no export option is available, the file may require a specialized converter or the original application that created it.
- Verify that the file extension is correct.
- Install or update compatible software.
- Try another application that supports this format.
- Check whether the file is corrupted, incomplete, or encrypted.
A file extension alone does not guarantee whether a file is safe or unsafe. Only open files from trusted sources, scan unknown files before opening them, and be especially careful with executable, script, archive, and document files.
File safety tips
Use caution with unknown files
Only open files from trusted sources. Before opening a .mp4 file, scan it with antivirus software, verify that the file extension is expected, and avoid running unknown executable, installer, macro-enabled document, or script files.