Extract MP3 Audio From Any Video File
FreeExtract and convert audio from MOV, AVI, MKV, WebM, MP4, and WMV to MP3. Works with any video format in your browser — no upload, no software. Free.
What's next
Settings guide
Audio quality inside different video formats:
- ·MOV (iPhone/Mac) — AAC audio, typically 128–256 kbps. Converting to MP3 at 192–320 kbps gives a clean result.
- ·MKV (rips, downloads) — Audio varies widely: FLAC (lossless), DTS (surround), AC3 (Dolby), AAC, or MP3. Converting from FLAC or DTS source to MP3 at 320 kbps gives you the highest possible quality.
- ·AVI (older files) — Often MP3 or AC3 audio inside. If the source audio is already MP3, use the same or higher bitrate when converting.
- ·WebM (browser recordings) — Opus audio. Opus at 128 kbps is comparable to MP3 at 192 kbps — transcoding to MP3 at 192 kbps preserves the perceptual quality.
- ·WMV (Windows) — WMA audio codec. Converting to MP3 at 192+ kbps handles most content well.
Mono vs stereo output:
- ·Keep stereo for music, concerts, and content with spatial audio.
- ·Use mono for voice recordings, interviews, lectures — saves file size with no audible difference.
Format comparison
Video to MP3 vs Video to MP3 in VLC: VLC on desktop handles all these formats natively with more codec options, no browser memory limits, and batch processing. This browser tool is faster to use for one-off conversions without installing software.
Video to MP3 vs keeping the original video: If the video is something you want to watch again, keep the original — the MP3 is a parallel extract for audio-only listening, not a replacement. If you only need the audio and storage matters, replacing the video with the MP3 frees significant space.
MOV and MKV audio extraction without re-encoding: For highest quality, some audio streams (particularly FLAC or AC3 inside MKV) can be extracted without re-encoding. This tool re-encodes to MP3. If you need a lossless extract from a lossless source, a desktop tool like FFmpeg gives you the option to copy the audio stream directly.
How it works
Upload video
Drop any video file — MOV, MKV, AVI, WebM, WMV, or MP4. The tool identifies the audio track.
Set output
Choose MP3 bitrate and mono or stereo. Match to your content type and listening use case.
Extract
The audio stream is decoded and re-encoded to MP3 entirely in your browser.
Download
Save the standalone MP3 file. The original video file is not modified.
About this format
The video file sitting on your device is really two things: a video stream and an audio stream, packaged together in a container. The container format — MOV, MKV, AVI, WebM, WMV — determines how the data is structured, but the audio inside could be AAC, MP3, FLAC, Opus, AC3, DTS, or any number of other codecs.
Different video sources produce different containers. iPhone videos are MOV files with AAC audio. Android screen recordings are often MKV or WebM with Opus audio. Windows screen captures are WMV or AVI. GoPro footage comes as MP4. Blu-ray rips are often MKV with DTS or FLAC audio. Old camcorder footage is AVI with MP3 audio.
This converter handles all of these. The approach is the same regardless of container format: read the video file in your browser, decode the audio stream, re-encode to MP3 at your chosen bitrate, and output a standalone audio file. The video stream is discarded; only the audio is processed.
Common use cases span a wide range: extracting the audio from an iPhone video of a live performance, pulling the interview audio from a screen recording, saving the soundtrack from a GoPro session, or converting a downloaded conference talk stored as MKV.