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Convert MP4 to WAV

MP4 · MP3 · M4A · WAV · FLAC · OGG · OGA · WebM · AAC · OPUS · MOV · MKV

Converting happens in your browser, so your file never leaves your device. Transcribing uploads the audio to SeaMeet.

Choose an MP4 and your browser saves its audio track as a WAV, ready for an audio editor.

How it works

  1. Choose the MP4 video whose sound you want.
  2. Turn on Mono for a smaller file, then select Convert & download.
  3. Save the WAV, or transcribe what was said.

A video's soundtrack, ready to edit

Video editors and audio people often need a clip's sound on its own: to clean up the dialogue of an interview filmed on a camera, remix a music video, sync a separate recording, pull a sound effect or build a voice-over track. MP4 is the format cameras, phones and screen recorders hand you, but audio editors and mixing software work best with WAV.

This page reads the MP4 on your own device, drops the picture and writes the audio track as an uncompressed WAV. Nothing is uploaded, even for a long recording. Because WAV isn't compressed, the result can be bigger than you'd expect for audio; Mono halves it when you only need one channel, such as a single microphone.

Working from a WAV avoids stacking another round of compression on top each time you export. When the job is words rather than sound, for example subtitles or meeting notes, Transcribe this file sends the audio to SeaMeet instead.

Questions

Does the MP4 get uploaded?

No. The video is opened by your browser on your own computer, only the sound is kept, and the WAV is saved there too. Uploading happens only if you pick Transcribe this file, and then just the audio goes to SeaMeet.

Is there a limit on video size?

Not for converting: the MP4 isn't uploaded, and it is read a piece at a time. The WAV needs free storage on your device, and a very long recording may be too long for a single WAV, in which case you can switch to MP3. Transcription allows 512 MB and 5 hours per file.

Will converting to WAV improve the sound?

No. The sound in an MP4 is usually compressed, and WAV can't add back what that compression removed. The WAV stores it uncompressed, as standard sixteen-bit audio, so an editor can work on it without another round of compression on top.

Can I edit the WAV in Audacity or GarageBand?

Yes. WAV opens in practically every audio editor and video editor, including Audacity, GarageBand and Premiere. Import it like any other audio file. If you only need speech from one microphone, turn on Mono to keep the file smaller.