convert

Video to MP4

Transcode video to H.264/AAC MP4.

Runs on your deviceBatch ready

Add video

MP4, MOV, WebM, MKV, AVI — up to 2 GB per file.

Drop a video here
Drag and drop, or choose files
MP4WEBMMOVMKVAVIM4VGIF
Video runs through FFmpeg compiled to WebAssembly on your machine. Big files take a moment.

Choose an output

Transcode video to H.264/AAC MP4.

Large files are slow in WebAssembly and must stay under 2GB.

Fine-tune

Optional — sensible defaults are already set.

Video qualityCRF 28
Best qualitySmallest file

About Video to MP4

This tool re-encodes MOV, MKV, WebM, AVI, M4V or animated GIF files into an MP4 with H.264 video and AAC audio. That combination plays on nearly every phone, TV, browser and editing app, so it is the safe choice when a file refuses to open or upload somewhere.

When it helps

  • Turning an MKV download into a file your TV or game console will play from a USB stick.
  • Converting an animated GIF into an MP4, which is usually far smaller and plays smoothly on social sites.
  • Fixing a WebM screen recording that an older editor or messaging app will not accept.
  • Standardising a folder of clips from different cameras before editing them together.

Tips

  • The quality slider sets the CRF value. Lower numbers (around 18 to 22) keep more detail and make bigger files; the default of 28 is a reasonable balance for sharing.
  • The output is written with the index at the start of the file (faststart), so it can begin playing in a browser before it has fully downloaded.
  • The video is always re-encoded, not just repackaged, so a long 1080p or 4K file can take a while in the browser. Try a short clip first to check the quality setting.

Good to know

Quick answers about video to mp4 in your browser.

Size depends on the codec and the CRF value, not the container. A file that was already efficiently compressed may grow slightly at a low CRF, while a GIF or a lightly compressed camera file usually shrinks a lot.

Yes. H.264 video with AAC audio in an MP4 is supported by the default players on iOS, Android, macOS and Windows, as well as by all major browsers.

Yes. There is no sign-up, no watermark and no limit on how many files you process.

No. Files are read and processed locally in your browser, so they never leave your device.

Large files are slow in WebAssembly and must stay under 2GB.

Related tools

VIDMOV to MP4Convert QuickTime MOV video to MP4.VIDVideo to WebMTranscode video to VP9/Opus WebM.VIDVideo to MP3Extract audio from video as MP3.VIDMP4 to MP3Extract MP3 audio from MP4 video.GIFVideo to GIFCreate a compact animated GIF from video.GIFGIF to MP4Convert animated GIF to MP4 video.VIDCompress VideoReduce video file size by re-encoding to H.264 with a higher CRF and capped resolution.VIDCrop VideoCrop a video frame by trimming pixels from each edge and re-encoding to MP4.VIDTrim VideoCut a clip from a video using start and end timestamps.

Part of the Video Converter collection.