How to Convert Video Formats — MP4, AVI, MKV and More
Learn the differences between video formats and how to convert AVI, MKV and other formats to MP4 for universal playback on any device.
Not all video files play on all devices. A video that plays fine on your computer may not work on your phone, TV, or in a browser. Understanding video formats and how to convert between them solves most playback problems.
Video format conversion showing MP4 AVI MKV and MOV formats converting to universal MP4
Common Video Formats Explained
- MP4 (H.264) — the universal standard. Plays on every device, browser, and platform.
- AVI — an older format that often uses inefficient codecs and plays poorly on phones.
- MKV — popular for high-quality rips but not supported by all devices or browsers.
- MOV — Apple's format, plays well on Mac and iPhone but sometimes not elsewhere.
- WEBM — designed for web streaming, supported by modern browsers.
Why Convert to MP4?
MP4 with H.264 video and AAC audio is the most compatible format in existence. Converting AVI, MKV, or MOV to MP4 makes your video play on iPhones, Android phones, smart TVs, web browsers, and virtually every media player. It also usually reduces file size because H.264 is highly efficient.
How to Convert Video Formats Online
- Go to the PureFileConverter AVI to MP4 tool page.
- Upload your video file.
- The tool transcodes it to H.264 MP4 with AAC audio.
- Download the MP4 and play it anywhere.
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If a video won't play on your device, converting it to MP4 is almost always the fix. PureFileConverter handles AVI to MP4 for free.
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