Video to MP3 / audio. The audio, out of the video.

How to use the Video to MP3 / Audio tool

This tool pulls the soundtrack out of a video and saves it as MP3, WAV or M4A, or copies the original audio track without changing it. It can also convert one audio file into another format. The work is done by FFmpeg compiled to WebAssembly, running inside your browser tab, so your file stays on your device.

Step by step

1. 1
   Choose your file

   Drop a file on the card that says Drop a video or audio file, or click it to browse. MP4, WebM, MOV, MKV, AVI, MP3, WAV, M4A, FLAC, OGG and similar files are accepted. A Source player appears with the file size, length and type.

2. 2
   Pick the output format

   Under output format, choose MP3 (selected first), WAV, M4A / AAC, or Original (fast). Original (fast) copies the existing audio track without re-encoding it, which is quickest and keeps the exact quality.

3. 3
   Set the quality

   For MP3 and M4A / AAC a Bitrate (quality) menu appears, from 96 to 320 kbps, with 192 kbps (recommended) selected. For M4A / AAC a higher number sounds better and makes a larger file. MP3 is encoded in a variable quality mode, so its size and sound may change little with this menu. WAV and Original (fast) have no bitrate setting.

4. 4
   Extract the audio

   Press the button under the options. Its label follows the format, such as Extract MP3 or Extract original audio. On the first run of a visit the tool downloads its audio engine, about 25 MB, then reads and converts your file while a progress bar fills.

5. 5
   Listen and download

   When the Result card appears, play it to check, then press Download. The file keeps your original name with the new extension. Press Choose another file to start again.

Reading the result

• The Result card shows the new file's size and type, such as MP3, WAV, M4A / AAC or MKA.
• M4A / AAC at the default 192 kbps works out to about 1.4 MB per minute of sound. MP3 size depends more on the sound itself than on the bitrate menu, because MP3 uses a variable quality mode.
• WAV is uncompressed 16-bit audio. For CD quality stereo that is roughly 10 MB per minute, so expect large files.
• Original (fast) saves an .m4a file when the track fits that format. If it does not, it falls back to an .mka file. If neither works, for example because the file has no audio track, it shows an error that suggests another format.

Tips and common mistakes

• Try Original (fast) first when you only need the audio as it is. If you get an .mka file and your player cannot open it, run the file again as M4A / AAC or MP3.
• If MP3 fails with a message that it is not available, choose WAV or M4A / AAC. The tool says those always work.
• Choosing a different format clears the last result, so download the file you want before switching.
• For a smaller file, choose M4A / AAC at 128 kbps (small) or 96 kbps (smallest). Lowering the menu may not shrink an MP3 much.
• Long or very large videos are held in memory while they convert. If a run fails or the tab slows down, try a desktop browser with more free memory, or a shorter clip.
• If the engine will not load, a network filter or content blocker may be stopping the download from cdn.jsdelivr.net. Try another network or browser.

Privacy and limits

Your file is read and converted inside your browser and is never uploaded. The only network traffic is the audio engine itself: the open source FFmpeg WebAssembly files, about 25 MB, fetched from cdn.jsdelivr.net the first time you press Extract on a visit. That request contains nothing from your file. Nothing is saved after you leave the page. The tool needs a browser with WebAssembly support.

Back to the tool

Everything a converter should do.

• Extract MP3 from any video at your choice of bitrate, 96 to 320 kbps. A narrated screen recording from our recorder is a common source: pull the voice track out as MP3 for a transcript.
• Convert video to WAV for lossless, uncompressed 16-bit PCM audio that plays everywhere.
• Export M4A / AAC audio from MP4, MOV, WebM and other containers.
• Copy the original audio track directly out of a video with no re-encoding, keeping perfect quality.
• Convert between audio formats, drop an MP3, WAV, M4A, FLAC, OGG or OPUS file and re-export it.
• Stay private: everything runs 100% in your browser, no uploads, no account, no file-size limits.

Frequently asked questions.

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