How to Convert MP4 to WAV Online
Follow these three simple steps to extract WAV audio from an MP4 video. No software installation required. Free and secure.
Select an MP4 Video
Choose an MP4 file containing the audio you want to extract.
Choose the WAV Audio Settings
Keep the automatic sample rate and channel layout or choose 22.05, 44.1, or 48 kHz and mono or stereo output.
Extract and Download
Start audio extraction, review the MP4 and WAV file sizes, and download the completed WAV file.
How Does the MP4 to WAV Converter Work?
The CompressFly MP4 to WAV converter reads the first audio stream in your MP4 file, leaves out the video, and decodes the sound into an uncompressed 16-bit PCM WAV file. You can keep the automatic sample rate and channel layout or select the available audio settings before extraction.
Audio extraction runs directly in your browser. Your MP4 file is not uploaded to a server, and the completed WAV file downloads from the browser to your device.
What "directly in your browser" means
- Your MP4 video is not uploaded to a server.
- Audio extraction and WAV encoding run locally on your device.
- The completed WAV file downloads directly from your browser.
When to Convert MP4 to WAV
Extract WAV audio when you need the sound from an MP4 video as a separate uncompressed PCM working file.
Edit Audio from an MP4 Recording
Extract speech, music, or other sound from an MP4 recording before editing it in an audio application or production workflow.
Prepare MP4 Audio for a WAV-Only Tool
Create a WAV file for transcription, waveform analysis, or another tool that does not accept MP4 video.
Create a PCM Working Copy
Keep the original MP4 video while creating a separate uncompressed audio-only file for further processing.
Related MP4 and Audio Tools
MP4 to WAV Converter FAQ
How do I convert MP4 to WAV online?
Use this online MP4 to WAV converter in three steps: 1. Select an MP4 video from your device. 2. Keep or change the available WAV audio settings. 3. Start extraction and download the completed WAV file.
What WAV format does the converter create?
The converter creates an uncompressed 16-bit PCM WAV file.
Can I change the WAV sample rate and channels?
Yes. Keep the automatic settings or choose 22.05, 44.1, or 48 kHz and select mono or stereo output.
Why is the WAV file larger than the audio in my MP4?
WAV stores the extracted audio as uncompressed PCM data, while MP4 videos commonly contain compressed audio. The WAV file size also depends on the audio duration, selected sample rate, and number of channels.
Is the MP4 to WAV converter free?
Yes. Convert MP4 to WAV for free with no registration or credit card required.
Is there a file size limit, and is my MP4 video uploaded?
Your MP4 video is processed locally in your browser and is not uploaded to a server, so there is no server upload limit. The practical limit depends on your device's available memory and processing power, as well as the video's duration and resolution.