MP4 Converter
The video container nearly every device and site accepts.
Up to 50 MB per file. Sign up free to convert files up to 100 MB.
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Checking files and selected output formats.
How to convert MP4 files online
Convert MP4 video to any format while preserving resolution, frame rate, and audio sync.
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1
Upload your MP4 video
Drag and drop MP4 files recorded on phones, cameras, or downloaded from the web. H.264 and H.265 encoded MP4 containers are both fully supported, along with embedded audio tracks and subtitles.
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2
Select your target format
Choose MOV for Apple and Final Cut Pro editing, MKV for multi-track audio and subtitle support, WebM for royalty-free HTML5 web embedding, or AVI for legacy software compatibility. Audio codec is re-encoded to match the target container.
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3
Download your converted video
Download the converted video ready for your target platform. Resolution, frame rate, and aspect ratio are maintained. Files are deleted from our servers within 1 hour.
Video Format Comparison
Choose the right output format when converting MP4 video files.
| Format | Compression | File size | Compatibility | Best For |
|---|---|---|---|---|
| MP4 | H.264/H.265 | Small–medium | Universal | Sharing, streaming, social media |
| MOV | H.264/ProRes | Medium–large | Apple, QuickTime | Mac editing, iPhone recordings |
| MKV | Multiple codecs | Large | PC, media players | High-quality archiving, subtitles |
| WebM | VP8/VP9 | Small | Web browsers | Web embedding, HTML5 video |
| AVI | Various | Large | Windows, legacy devices | Legacy compatibility, editing |
Reasons to convert MP4 videos
Final Cut Pro works best with MOV/ProRes, and some NLEs prefer native codecs. Convert MP4 to MOV for timeline editing in Apple workflows, or to AVI for legacy editing software.
MP4 has limited support for multiple audio tracks and subtitle streams. Convert to MKV to embed multiple language audio tracks, forced subtitles, and chapter markers in a single file.
H.264 in MP4 carries licensing considerations for commercial use. Convert MP4 to WebM (VP9 or AV1) for a completely royalty-free, open-source format that plays natively in HTML5 browsers.
Pull the audio track from any MP4 video by converting to MP3, AAC, or WAV. Ideal for extracting music, dialogue, podcast audio, or voiceovers without installing video editing software.
Older MP4 files encoded with H.264 can be re-encoded with H.265 for 30-50% smaller files at the same quality. Convert to WebM with AV1 for the best compression ratio available today.
Convert MP4 video online, no desktop apps, no plugins. Files up to 100 MB are always free, and all videos are deleted from our servers within 1 hour.
About the MP4 Format
MP4 (MPEG-4 Part 14) is an ISO standard multimedia container format based on Apple's QuickTime file structure. It is the most widely supported video format in the world, capable of playing on virtually every device, browser, and platform without additional software. MP4 files typically contain H.264 or H.265 video streams paired with AAC audio, though the container can hold a variety of codec combinations.
MP4 is the default choice for video distribution across the web, social media, streaming platforms, and mobile devices. Its combination of broad compatibility, efficient compression, and reasonable quality makes it suitable for everything from casual smartphone recordings to professional video delivery. The main limitations of MP4 are its relatively basic subtitle support compared to MKV, and the fact that some advanced codec configurations may not be universally playable on older devices.