Video to MP3
Pull just the audio out of a video and save it as MP3. Files never leave your device.
No upload · Processed in your browserMP4 · MOV · WebM · MKV · 3GP · AVI · WMV · FLV · MP3 · M4A · WAV · OGG · FLAC1 GB per file (recommended)As of 2026.09.30
How to use
- 1Drag and drop one video or audio file, or pick it with [Choose files]. A video with no sound is flagged as soon as it's added
- 2Choose how to save it (MP3 or original audio) and the audio quality, then press [Start]
- 3Listen to the result to check it, then save it with [Download]
The big number on the result card is the size of the result file, and you can listen to the result right there. The result changes the extension, as in clip.mp4 → clip.mp3; with “Original audio (as is)”, it becomes clip.m4a or clip.ogg depending on the audio codec.
You can add one file at a time. We recommend up to 1 GB on desktop and 200 MB on mobile. Going over the recommendation shows a warning, but you can still continue. Files over 4 GB are not processed. For AVI, WMV and FLV, which go through the fallback engine, we recommend up to 300 MB on desktop and 100 MB on mobile, and files over 700 MB are not processed.
- Example 1 · MOV to MP3
h264-aac.mov (10 s, AAC 48 kHz stereo) · MP3 192kbps (default)
Measured in Chromium on desktop · synthetic test video (test pattern + 440 Hz tone)
→ h264-aac.mp3 · 235 KB · 10.0 s · 48 kHz stereo
- Example 2 · Original audio (as is)
h264-aac.mov (AAC) / vp9-opus.webm (Opus) · Original audio (as is)
Measured in Chromium on desktop · synthetic test video (test pattern + 440 Hz tone)
→ h264-aac.m4a (AAC) 159 KB · vp9-opus.ogg (Opus) 146 KB · neither re-encoded
- Example 3 · A video with no sound
noaudio.mp4 (no audio track)
Measured in Chromium on desktop · synthetic test video
→ “This video has no audio” appears as soon as it's added, and the file isn't processed
Example figures vary by file and device.
Options explained
- Save as
- “MP3” (default) re-encodes the audio and saves it as MP3. “Original audio (as is)” takes the audio out of the video without re-encoding, so the sound is identical to the original, and the format follows the audio codec: AAC is saved as .m4a, MP3 as .mp3, and Opus or Vorbis as .ogg. If the device or app you'll play it on can't open M4A or OGG, choose MP3. Files whose audio isn't one of those four codecs (such as WAV or FLAC files), and AVI, WMV and FLV files, can't be saved as original audio, so save them as MP3.
- Audio quality (bitrate)
- Choose how much data per second the MP3 uses: 128, 192 (default) or 320kbps. It's a constant bitrate (CBR), so the file size is roughly proportional to the bitrate and the length. Choose 128kbps for a smaller file, or 320kbps to put sound quality first. The result can't sound better than the original. Not used with “Original audio (as is)”.
- Sample rate and channels
- This isn't a setting you can turn on or off; it always works the same way. When saving as MP3, the sample rate and channel count follow the original, but anything above 48 kHz is brought down to 48 kHz, and 3 or more channels (such as 5.1) are mixed down to 2 (stereo). “Original audio (as is)” leaves the sound unchanged. Either way, tags such as the title and metadata such as shooting location and device info are not carried over to the result.
Frequently asked questions
Are my videos sent to a server?
No. Extracting the audio happens inside this browser and your files are never sent off your device. To check it yourself, follow the steps on the How it works page.
What bitrate should I use for MP3?
Start by saving at the default 192kbps and listening. 128kbps makes a smaller file and 320kbps a larger one. With a constant bitrate, the size is roughly proportional to the bitrate and the length: the 10-second test file saved at 192kbps was 235 KB. The result can't sound better than the original, so if the original audio is low quality, a higher bitrate may only make the file larger.
What's the difference between “Original audio (as is)” and MP3?
“Original audio (as is)” takes the audio out of the video as it is, without re-encoding, so it sounds identical to the original. The format follows the original codec instead: the test file h264-aac.mov was saved as h264-aac.m4a (AAC, 159 KB), and vp9-opus.webm as vp9-opus.ogg (Opus, 146 KB). The same h264-aac.mov saved as MP3 at 192kbps was 235 KB. If the device or app you'll play it on can't open M4A or OGG, save as MP3.
It says “This video has no audio”.
That means the video has no audio track, as with a screen recording made without sound. This is checked as soon as the file is added, and that file isn't processed. The test file noaudio.mp4, which has no audio track, was also left out with this message. Add an original file that has sound.
Can I turn audio files into MP3 too?
Yes. You can also add MP3, M4A, WAV, OGG and FLAC audio files, and they're saved as MP3 at the bitrate you choose. The sample rate and channel count follow the original and are reduced if they go above 48 kHz or 2 channels.
Related tools
How it works · Engine · Notes
- Processed in: this browser (your device)
- Engine: Mediabunny (MPL-2.0) · LAME (Mediabunny MP3 encoder) (LGPL-2.0-or-later) · FFmpeg (ffmpeg.wasm, fallback) (GPL-2.0-or-later)
- Audio extraction runs inside this browser with Mediabunny and the browser's built-in decoders (WebCodecs), MP3 encoding uses LAME (WebAssembly), and files are not sent to a server.
- AVI, WMV and FLV files, and codecs this browser can't handle, are processed with a fallback engine (FFmpeg, WebAssembly, about 31 MB) that is downloaded the first time and kept in the browser cache.
- The MP3's sample rate and channels follow the original and are reduced if they go above 48 kHz or 2 channels.
- Tags such as the title and metadata such as shooting location and device info are not carried over to the result.
- As of 2026.09.30
- Changelog: 2026.09.30 First release