Convert Video to MP4 (MOV, WebM, MKV)

Turn MOV, WebM, MKV, or AVI recordings into universally playable MP4 files.

100% Local · Files never leave your device

IN: MOV · WEBM · MKV · AVIOUT: MP4 · H.264 + AAC

100% LOCAL

Drop your file here or tap to browse

Processed directly inside your browser with zero server uploads

Choose file

How it works step by step

Outputs standards-compliant H.264 (yuv420p) video and stereo AAC audio so every media player and editor opens it cleanly.

Convert WebM captures into standard MP4 files ready for social platforms, slides, and video editors.

Because conversion runs on your own device via WebAssembly, there are no daily caps or paywalls.

Supported input formats	MOV · WEBM · MKV · AVI
Output target format	UNIVERSAL MP4
Conversion engine	FFmpeg WebAssembly (in-browser local)
Storage & Privacy	100% Local · Files never leave your device

How do I convert an iPhone .MOV file to .MP4?

Select your .MOV video in the dropzone above and press Process. You will get a standard MP4 file ready for Windows, Android, and web uploads.

Will WebM audio be preserved when converting to MP4?

Yes. WebM Opus/Vorbis audio is transcoded automatically into universal AAC audio inside the MP4 container.

Do I need to install FFmpeg or codecs?

No installation is needed — the engine runs directly inside your web browser.

Are there daily conversion limits?

None at all. Convert as many videos as you need for free.

Shrink heavy video files in megabytes while keeping clean visual clarity.

Separate the audio track from MP4, MOV, or WebM videos as MP3 or WAV.

Preview your media, set MM:SS start and end times, and export the exact clip.