Video & Audio Format Converter

Change your video's container (MP4, MOV, WebM), extract just the audio from a video, or convert audio files to MP3/WAV — all in your browser.

Runs 100% in your browser — your video and audio files are never uploaded to a server.
Drag a video or audio file here or click to select
MP4, MOV, WebM, MKV, MP3, WAV, M4A, AAC, OGG, FLAC and more are supported

This conversion requires re-encoding and may take a while depending on file size and your device.

How Does the Video & Audio Format Converter Work?

This tool opens your file with your browser's built-in media engine (WebCodecs), detects its format and the video/audio tracks it contains, and offers you the valid target formats. Only formats your browser can actually produce are shown; for example, a target won't appear in the list if it requires a video encoder your device doesn't support. When the container is compatible, conversion is a fast "remux" (the codec is copied as-is); when the codec needs to change (e.g. converting to WebM), the file is re-encoded, which can take a bit longer.

The most common uses are changing a video's container to make it compatible with a different device or platform (e.g. MOV to MP4), extracting just the audio from a video file and saving it as MP3 or WAV, or converting an audio file to another audio format (e.g. WAV to MP3). When extracting audio from a video, the video track is automatically discarded — only the audio is encoded and downloaded.

Your files are never uploaded to a server — all decoding, encoding and conversion happens entirely on your own device, inside your browser. That's an important privacy advantage when working with personal video/audio recordings or copyrighted content; your file never touches a third-party server.

Try This Next

Finished here? These might be your next step.

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Frequently Asked Questions

No. Format detection and all conversion happen on your own device, inside your browser. It's safe to use for personal video/audio recordings too.

Most formats your browser can decode: MP4, MOV, WebM, MKV for video; MP3, WAV, M4A/AAC, OGG and, in most browsers, FLAC for audio. If a file won't open, your browser may not support that codec.

Only formats your browser can actually produce are shown — for example, some older browsers can't encode WebM video. Extracting MP3/WAV from a video also only appears if the file actually contains an audio track.

MP4 has the broadest compatibility and plays on almost any device or platform. MOV works better with Apple's ecosystem (QuickTime, iMovie, etc). WebM is preferred on websites for its smaller file size but may not play on some older devices.

Simple conversions that don't change the container (e.g. MP4↔MOV) usually take seconds. Conversions that require a codec change (e.g. to WebM, or extracting audio) re-encode the video; depending on length and your device's processing power this can take a few minutes. Since everything is processed in your device's memory, watch out for memory limits on very long files.

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