Extract the audio track from MOV, MKV, WebM, TS or MP4 video as an MP3, five files at a time, without the footage ever leaving your browser.
✓ No upload — runs in your browser
✓ Batch convert & ZIP download
✓ Free, no sign-up
Drop MP4, MOV, MKV, WEBM, TS, M4V files here
or
Free: up to 5 files per batch · Files never leave your device · Paste from the clipboard works too
The free plan converts 5 files per batch. Only the first 5 were added.
Get Pro for US$9 once — unlimited batches and no ads, forever.
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Waiting…
Private by design
Your files are processed by your own device using WebAssembly and your browser's built-in codecs. Nothing is uploaded, logged or stored.
Fast & offline-ready
No queue, no waiting for a server. Once the page has loaded it even works without a connection.
Works everywhere
Chrome, Edge, Firefox and Safari on Windows, macOS, Linux, Android and iOS. No app to install.
One converter for every container
Video arrives in whatever wrapper the device that made it prefers. The sound inside is what matters here, and Tinyvert reads it from all the common containers:
Container
Where it comes from
Audio usually inside
.mov
iPhone and iPad camera, Mac screen recordings, QuickTime, mirrorless cameras
AAC, sometimes PCM
.mkv
OBS and game captures, HandBrake output, Blu-ray rips
AAC, Opus, FLAC, Vorbis (AC-3 or DTS on disc rips)
.webm
Browser screen recorders, Chrome's MediaRecorder, web downloads
The converter parses the container in your browser, finds the audio track and decodes it with the decoder your browser already ships. The video stream is skipped entirely, so the job depends on the length of the soundtrack, not the resolution of the picture. Decoded samples go to the LAME MP3 encoder, a 300 KB WebAssembly module loaded the first time you need it, at the bitrate you selected. Channel count and sample rate are carried over unchanged.
What people use this for
Turning an iPhone .mov of a gig, speech or rehearsal into something a music app can play.
Pulling the commentary out of an OBS .mkv game capture.
Keeping the narration of a WebM screen recording after the video itself is no longer needed.
Saving the sound of a TV programme captured as .ts by a set-top box.
Collecting a week of recorded calls or lectures into a folder of small MP3s.
Limits worth knowing
Browsers decode AAC, MP3, Opus, Vorbis, FLAC and PCM, which covers nearly every phone, camera or screen recording. Dolby Digital and DTS tracks, common on Blu-ray and DVD rips, are not decodable in a browser, so such a file stops with an error. Subtitles and chapter markers are ignored. Input and output are both held in memory, so large files are limited by your device's memory; a laptop copes with far more than a phone.
Nothing is uploaded
A video can be hours of private footage, so the conversion runs entirely on your device: nothing is sent to a server, logged or stored, and after the first use the page works offline. Five files run per batch with a progress bar each, and the ZIP download is built locally. Tinyvert Pro, a one-time US$9 purchase, lifts the batch limit and removes the ads.
Next steps
Have only MP4s? MP4 to MP3 is the same engine with a narrower file picker. To keep the video but drop the sound, use Remove Audio; to end up with WAV, FLAC or M4A instead of MP3, pick the Audio Converter, which accepts the same video files. The guide on extracting audio from a video covers the details.
How to convert video to mp3 — step by step
1
Drag MOV, MKV, WebM, TS or MP4 files into the drop zone or click "Choose files" (up to five per batch).
2
Choose a bitrate from the Bitrate menu; 192 kbps is preselected.
3
Each row shows a progress bar while the audio track is extracted and encoded, then the size saving once it is done.
4
Download the MP3s one by one or all together as a ZIP, or tap Share on a phone.
Frequently asked questions
Which video formats can I convert to MP3?
MP4, M4V, MOV, MKV, WebM and TS, including the .m2ts and .mts files camcorders produce. The audio inside must be a codec the browser can decode: AAC, MP3, Opus, Vorbis, FLAC or PCM.
Does the picture get converted as well?
No. Only the audio track is decoded; the video stream is discarded, which is why even long files finish in a fraction of the time a video re-encode would take.
My MKV fails with a decoding error. Why?
Disc rips and some broadcast captures carry Dolby Digital (AC-3) or DTS audio, which browsers cannot decode. Files with AAC, Opus, Vorbis, FLAC, MP3 or PCM tracks work fine.
Is the sound quality reduced?
The track is decoded and re-encoded as MP3 at the bitrate you choose. At 192 kbps or above the loss is inaudible for nearly everyone. A WebM whose Opus track was recorded at 128 kbps gains nothing from 320 kbps, though.
Does it work in Firefox or Safari?
Yes. Chrome, Edge, Brave and Opera on desktop and Android, Safari 17 or newer on Mac and iPhone, and Firefox 130 or newer all have the WebCodecs support the converter needs.