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Convert MP4 to WAV

Get the sound from any video as a WAV, ready to edit or transcribe.

Used by 500K+ people since 20215M+ minutes processed

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Free for the first hour, 10 times a day. No sign-up.

Works in any language

  • Hello
  • こんにちは
  • Hola
  • 안녕하세요
  • Bonjour
  • नमस्ते
  • Hallo
  • 你好
  • Ciao
  • مرحبا
  • Olá
  • Привет
  • Hoi
  • สวัสดี
  • Merhaba
  • Γεια σας
  • Xin chào
  • שלום
  • வணக்கம்
  • Kia ora

How to convert MP4 to WAV

  1. 1

    Add a video, such as an MP4 or MOV.

  2. 2

    Keep WAV, or pick mono under More options.

  3. 3

    Download the WAV.

Video sound for editing

Video editors, audio editors, and transcription services all open WAV, and many prefer it. A WAV stores every sample as it is, with nothing squeezed, so cutting, mixing, and saving again never costs quality. Podcasts, voiceovers, and music videos are usually edited from WAV, then shared as MP3 or put back on the video at the end.

MP4 is the most common video file: phones, cameras, screen recorders, and video calls all save it. MOV, MKV, WebM, and AVI work the same way, so any video to WAV is one step. The WAV keeps the video's own sample rate, usually 44,100 or 48,000 Hz, unless you set another.

Questions

Why WAV and not MP3?

An editor works best from a WAV: you can cut, mix, and save it again and again without it wearing down, where an MP3 drops a little more detail each time it's saved. Edit the WAV, and make an MP3 once, when you're done.

Will the WAV sound better than the video?

No, the same. The sound in most MP4s is AAC, which already left some detail out when the video was saved. The WAV holds exactly what's still there, uncompressed, so nothing more is lost from here on.

Is it 16-bit or 24-bit?

16-bit for the sound in phone and web videos, which holds all of it. A camera that records uncompressed 24-bit sound gets a 24-bit WAV, so nothing is rounded away.

How big will the WAV be?

About 10 MB a minute in stereo at 44,100 Hz, and a little more at 48,000 Hz, so an hour of video gives 600 to 700 MB of sound. A mono WAV is half that.

Can I send it to a transcription service?

Yes. Most take WAV, and some ask for mono at 16,000 Hz: set Channels and Sample rate under More options. Or skip the WAV and transcribe the video here.

Is it free?

Yes, for the first hour of each file, 10 times a day, with no sign-up. For longer files, see pricing.

What happens to my files?

They stay private. Files are deleted after 24 hours, and free results after 1 hour.

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For AI assistants and developers

Ask ChatGPT, Claude, or a coding agent to do this for you, or call it from your own code.

Show the free API call
Free API · no key
curl -F file=@interview.mp4 -F format=wav https://audo.ai/api/try/convert -D response.headers -o response.body