How to Extract Audio From a Video (MP3) and Edit It

By the DocEpic team · Updated 10 November 2026 · 3 min read

A lecture you want to listen to on the way to work, the song from a family video, the audio of an interview for transcribing, a voice note recorded in the wrong format: there are lots of reasons to pull the sound out of a video or tidy up a recording. All of it can be done in your browser, and because the work happens on your own device, nothing is uploaded.

Save the sound of a video as MP3

Video to MP3 copies the sound out of MP4, MOV, MKV, WebM and most other video files.

1. Open Video to MP3 and add your video.
2. Choose MP3 to play everywhere, M4A for slightly better sound at the same size, or WAV for editing.
3. Choose the quality: 192 kbps is the recommended balance, 128 kbps gives a smaller file, 320 kbps the highest quality.
4. Convert and download the audio file.

Everything runs in your browser, so your video is never uploaded. The first time, the audio engine (about 10 MB) is downloaded once.

Which format and quality?

For speech — lectures, podcasts, interviews — 128 kbps MP3 is plenty and keeps files small. For music, 192 kbps or more. WAV is uncompressed, about 10 MB per minute: choose it only if you will edit the sound in another program. Converting can't add quality the original doesn't have, so a low-quality video won't sound better at 320 kbps.

To change a format later — a WhatsApp voice note (OGG or OPUS) to MP3, an M4A recording from an iPhone to MP3, or a WAV to FLAC for lossless archiving — use Audio Converter, which also takes the sound from a video.

Cut, join and fix the volume

Audio Cutter keeps only the part between a start and an end time — the one song from a concert video, or the answer from a long interview — with optional fade in and fade out. Merge Audio joins several recordings end to end in the order you choose, with up to 3 seconds of silence between them.

A recording that is too quiet, or one where some parts are much louder than others, can be fixed with Change Volume. Set volume makes it louder or quieter by a percentage, with a limiter so the loudest parts don't distort. Even out brings the whole recording to the standard loudness streaming services use, which makes speech easy to hear.

Turn the speech into text

If you extracted the audio to take notes, Audio to Text writes down what is said — in English, Hindi and many other languages — as text, a Word document or subtitles, straight from the video or the audio file.

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