Use the free Video to WAV Extractor below. Your file never leaves your device.
What this tool does
This Video to WAV Extractor takes a video file and gives you back only its sound, as a WAV file. You choose a video on your device, the tool reads the audio track inside it, and it builds a new WAV for you to download. Nothing is uploaded. The video never leaves your device, because all the work happens in your browser.
WAV is an uncompressed format. That means the sound is stored as plain audio samples, with no lossy step to shrink it. The result keeps full quality, but the file is large. The tool shows you the expected WAV size before you download, so a big file never surprises you.
How to use it
First, press the file button and choose a video from your device. The tool reads the audio track and shows its length, channel count, sample rate, and file size. It also draws a wave picture of the sound, so you can see loud and quiet parts from start to finish.
Before you press the button, look at the note under the file details. It tells you how large the WAV will be. Then press Extract WAV. When the result appears, you can play it in the page to check it, and then download it. If the file is larger than you expected, you can stop there and choose a different option, such as an MP3, instead.
Worked example with a real test file
We tested this tool with a real two second MP4 made for testing. The test video was 44.6 KB, with a single audio channel at 44,100 Hz. After decoding, the tool showed a length of 2.0 seconds and a note that the WAV would be about 172.3 KB.
After extraction, the WAV file was 176,444 bytes, about 172.3 KB, exactly as predicted. Its first four letters were RIFF, which is the header that marks a real WAV file. That check matters, because it proves the download is a genuine WAV, not a renamed file.
Note how much larger the WAV is than the test video: 172.3 KB against 44.6 KB. That gap grows with length, because every second is stored in full.
When should you choose WAV over MP3
Choose WAV when you plan to edit the sound. Editing works best from full quality audio, because every later step, such as cutting, fading, or mixing, starts from clean data. If you start from an MP3 and edit it, then save as MP3 again, quality is lost twice.
Choose WAV when the sound itself is the work, for example a voice recording you will clean up, a music part you will mix, or an interview you will transcribe and archive. Choose MP3 instead when you only need to listen or share, because MP3 files are far smaller and play everywhere.
Good uses for this tool
This tool suits editing preparation. You can pull the sound from a recorded lesson to cut out pauses, or take the audio from a filmed interview to clean up background noise.
It also suits archiving: a WAV copy keeps full quality for later work, even if you later make smaller MP3 copies for sharing.
Honest limitations
This tool works with the audio track of a video your browser can decode. An MP4 file with a normal audio track works well. A file with no audio track has nothing to extract, and the tool will say so. A damaged file, or a format your browser cannot decode, may fail, and the tool will show a plain error instead of a fake result.
The WAV file is large by design, and that size is the main limit. Long videos produce very large files, which can be slow to download and hard to send by email. Keep the tab open until the result appears.
Finally, only extract audio from videos you have the right to use. If a video belongs to someone else, or carries music you do not own, extracting it does not give you the right to share it.
Frequently asked questions
Does my video leave my device?
No. The file is read in your browser only. It is not uploaded to a server, and no account is needed.
Why is the WAV so much bigger than the video?
WAV stores sound without compression, so every second takes the same amount of space. Video files compress both picture and sound, which is why they can be smaller than a WAV of the same sound.
Will the WAV sound better than the original video?
No. WAV keeps the quality that is already there, but it cannot add detail that the source video did not have. If the original sound was noisy, the WAV will be noisy too, just at full quality.
Can I extract audio from a video with no sound?
No. If there is no audio track, there is nothing to extract. The tool will report that no audio was found.
Spanish version: Extractor de Audio de Video a WAV