Convert Video to MP3

How to Extract the Audio from a Video as an MP3

Sometimes the sound is the only part of a video you need: a recorded lecture you want to listen to while driving, an interview you have to transcribe, or a clip filmed on your phone at a family event where the audio matters more than the picture. This tool separates the audio track from the video and saves it as a standalone MP3 that plays on any phone, media player or audio editor.

It is powered by ffmpeg.wasm, a build of the well-known FFmpeg program that runs inside the browser. On first use your browser downloads the library files; after that, the video itself is processed on your device and is not uploaded anywhere. The audio is encoded with the LAME MP3 encoder at a high variable-bitrate (VBR) quality setting, a good balance between clarity and file size.

How to use it

1. Drag your video into the drop area, or click the area to pick a file. Common formats such as MP4, WebM and MOV are accepted.
2. Check that the file name and size appear under the drop area. Choosing another file replaces the first one, since the tool handles one file at a time.
3. Click Extract audio (MP3).
4. The first time, a message says the processing library is loading; then conversion starts and the progress bar fills.
5. When it finishes, the MP3 downloads automatically with the same name as your video, and a success message appears.

What the tool does

• Keeps only the audio track and drops the picture, so the file is far smaller than the video.
• Encodes high-quality VBR MP3 suitable for both speech and music.
• Keeps your original file name and changes only the extension to .mp3.
• Shows a progress bar, status messages and a clear error if something goes wrong.
• Processes everything locally, so your video never leaves your device.

Practical examples

• A student turns a long recorded lecture into audio to review on the bus without keeping the screen on.
• A creator pulls the voice-over from an old video to reuse in a podcast episode.
• A journalist extracts the sound of a filmed interview to load into a transcription app that only accepts audio.
• Someone saves a recitation or song recorded on their phone to listen to later without the video.

Tips and notes

• If the video is silent or has no audio track, no file is produced and an error is shown.
• Very large files use a lot of memory because all processing happens in the browser, and may fail on phones with limited RAM. Trim the part you need first.
• The MP3 cannot sound better than the audio inside the original video.
• Keep the tab open until the success message appears; closing it stops the conversion.
• An internet connection is needed the first time to load the library, but your file is never sent anywhere.

For long recordings, cut out the part you need with the video trimmer first. To go the other way, try audio to video, and for WebM files specifically there is WebM to MP3.