Video to MP3 Converter
Extract the audio track from MP4, MOV, MKV, WebM, or AVI and save it as MP3.
No data sent to serverRelated Tools
What Extracting Audio Actually Does
A video file is a container holding separate streams: pictures in one, sound in another. “Converting video to MP3” is really two operations — throw away the video stream, then re-encode the remaining audio into MP3. Because no pictures are processed, it is dramatically faster than a video conversion. A 40-minute recording usually finishes in well under a minute even in a browser tab.
The audio inside your video is almost never MP3 to begin with. MP4 files carry AAC, WebM carries Opus or Vorbis, MKV rips often carry AC-3 or DTS. All of those have to be decoded and re-encoded, which is why the bitrate setting matters — see below.
Choosing a Bitrate
MP3 is a lossy format, and the bitrate decides how much data it keeps per second of audio. Higher means better sound and a bigger file.
- 320 kbps — the MP3 ceiling. Use when the source is high quality and you want the least additional damage. About 2.4 MB per minute.
- 256 kbps — very close to 320 in practice, meaningfully smaller.
- 192 kbps — the default here. A sensible balance for music from video sources, which have already been compressed once. About 1.4 MB per minute.
- 128 kbps — the classic “CD-ish” setting. Fine for podcasts, lectures, and anything speech-heavy.
- 96 kbps — for spoken word where file size matters more than fidelity.
One important caveat: picking 320 kbps does not restore quality that was never there. If the video’s audio was a 128 kbps AAC track, encoding it to 320 kbps MP3 just wraps the same damaged audio in a bigger file. Matching or slightly exceeding the source bitrate is the sensible move.
Why the Result Sounds Slightly Different
Audio in a video has already been through one lossy encoder. Converting it to MP3 runs it through a second one, and the two encoders discard different things. This is called generation loss, and it is unavoidable when the target format differs from the source.
For speech, lectures, and background music the difference is inaudible. For critical listening, the honest answer is that a video file was never the right source — go back to the original audio release if one exists.
How to Use
- Pick a bitrate. 192 kbps suits most material; drop to 128 kbps for speech.
- Drag in a video file. It never leaves your computer.
- Click Extract MP3. The first run loads the converter engine, then it is cached.
- Play the result in the built-in player to check it.
- Click Download MP3.
Technical notes
- Encoder: LAME, the reference MP3 encoder, at a constant bitrate
- Sample rate: resampled to 44.1 kHz, the rate every MP3 player expects
- Channels: preserved from the source (stereo stays stereo, mono stays mono)
- Video stream: discarded entirely, including embedded cover art
- Multiple audio tracks: the first one is used
- Tags: no ID3 title or artist tags are written — add them in your music player if needed
FAQ
Which video formats work?
MP4, M4V, MOV, MKV, WebM, AVI, WMV, FLV, MPEG, and TS. If a player can open it, this can almost certainly pull the audio out of it.
Why is this so much faster than converting the video?
No frames are touched. Video encoding is the expensive part — skipping it removes 95% of the work. Audio-only processing runs many times faster than real time even in a browser.
Can I download audio from YouTube with this?
No. This tool works on video files you already have on your computer. It cannot fetch anything from a URL, and downloading content you do not own may breach the platform’s terms of service and copyright law.
Should I use MP3 or something newer?
MP3 is technically outdated — AAC and Opus sound better at the same bitrate. It survives because everything plays it: car stereos, old MP3 players, cheap Bluetooth speakers, exercise equipment. Choose MP3 for maximum compatibility, and a modern format when the destination supports it.
Is my video uploaded anywhere?
No. Extraction happens inside your browser through FFmpeg compiled to WebAssembly. Nothing is transmitted, which is why there is no queue and no file-size paywall.
The output has no title or album art.
Correct — only the audio is written, with no ID3 metadata. Most music players let you edit tags directly, or you can add them with a tagging tool.
Can I extract just part of the audio?
Not directly. Trim the video first with the video trimmer, then extract the audio from the trimmed clip — both steps run locally and the trim is near-instant.
Why is my extracted audio quieter than expected?
The extraction does not change levels, so the volume matches the source. Film and TV audio is often mixed with wide dynamic range, which sounds quiet next to commercially mastered music.
Can I extract audio from a file with several audio tracks?
The first audio track is used. Selecting a specific language track requires a tool that lets you choose streams manually, such as desktop FFmpeg or MKVToolNix.
⚠️ Reference Only
Output is generated based on your input and is provided for reference. Results may vary depending on your specific use case, edge cases, or environment-specific behavior. We do not guarantee accuracy of conversions, validations, or computed values.
Always verify critical outputs against official documentation or production environments. We are not responsible for any decisions or losses based on these tool results.