Free online tool

MP4 to WAV Converter

Save the sound from an MP4 as an uncompressed WAV for audio editors, samplers and transcription.

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MP4

Max file size: 100 MiB

Uncompressed PCM audio

The first audio track becomes a 16-bit stereo WAV at 48 kHz, which audio editors, DAWs and transcription tools open directly.

Choose the section

Set a start time and a duration of up to five minutes, or leave the duration blank to keep the rest of a shorter file.

Videos and audio-only MP4s

Use an MP4 from a phone, camera or screen recorder, or an MP4 that contains only sound. The picture is left out.

How to convert MP4 to WAV

  1. 1

    Choose an MP4 file with sound, up to 100 MiB.

  2. 2

    Enter a start time and, if needed, a duration of up to 300 seconds.

  3. 3

    Convert the file and download the WAV.

What people use this tool for

  • Import a video's dialogue into an audio editor or DAW.
  • Prepare a recording for transcription software that asks for WAV.
  • Save a sound effect or music cue from a video as uncompressed audio.

Frequently Asked Questions

Is the WAV better quality than the MP4's audio?

WAV is uncompressed, so no further lossy compression is applied, but it cannot restore detail removed when the MP4's AAC or MP3 audio was encoded. Audio is resampled to 48 kHz and mixed to stereo when the source differs. Expect the WAV to be much larger than the MP4's sound.

What WAV format does the converter create?

16-bit PCM at 48 kHz with two channels, about 11 MiB per minute. Mono sound is copied to both channels and surround tracks are mixed down to stereo.

Which audio track is converted?

The first audio track. Other audio tracks, video, subtitles, chapters and metadata are not included. If the MP4 has no audio track, the converter says so instead of creating a silent file.

How long can the MP4 be?

Upload up to 100 MiB. The MP4 can be up to 30 minutes long, and each WAV can contain up to five minutes, about 55 MiB. For longer recordings, export one section at a time by changing the start time.

Can I convert MOV, M4V or WebM videos to WAV?

This page accepts .mp4 files. Use the Audio Extractor for MOV, M4V and WebM videos; it saves WAV or MP3 with the same settings.

Where are files processed and when are they removed?

This tool uploads files to Zutilium's server for processing. After a successful conversion, uploads are scheduled for deletion after about one minute and generated downloads after about ten minutes. Cleanup runs periodically, so removal is not immediate. Save your result promptly.