What is MP4 (MPEG-4 Part 14)?
MP4 is the most compatible video format, usually with H.264 video and AAC audio.
If you are unsure which video format to choose, choose MP4. It is the safest option for sharing and playback.
File extensions: .mp4, .m4vMIME types: video/mp4
Advantages
- Plays on virtually every device
- Good quality at small size
- Streaming friendly
Disadvantages
- Lossy compression
- H.264 and H.265 are patent encumbered
- Less flexible than MKV
Typical uses
- Sharing videos
- Web video
- Phone and camera recordings
Compatibility
Supported by all browsers, phones, TVs and editors.
Convert MP4 to another format
Convert to MP4 from another format
Frequently asked questions
Are my files uploaded to a server?
No. The conversion runs entirely in your browser with local code. Your files never leave your device, and there is no upload.
Is there a file size limit?
There is no limit on our side, but your browser memory is. Images work for very large files; for videos, files above a few hundred megabytes can fail on devices with little memory.
Will the quality suffer?
That depends on the target format and settings. Use the quality option to balance size and detail; lossless targets keep everything the source contained.
Which browsers are supported?
Current versions of Chrome, Edge, Firefox and Safari. Fast hardware paths are used where available, with a compatible fallback otherwise.