AnyFormat

00 MOV → MP3

MOV to MP3

Works on iPhone recordings the browser cannot even play.

Drop files or a folder here

or choose from your device · paste with ⌘V / Ctrl+V

.mov .qt

03Options 5

Right for speech, wrong for music. At a fixed quality the file size does not change — but mono tolerates a much lower quality than stereo, so combine the two to actually shrink the file.

Leave at 0 for the whole file.

0 means run to the end.

  • No upload The conversion runs in this tab. Your file never travels — not to us, and not to the advertising.
  • No sign-up, no email, no daily cap There is no account system to sign up to.
  • No size limit we invented Only your device's memory — about ~2 GB on a desktop browser, ~400 MB on a phone.
  • Turn your Wi-Fi off and convert anyway The conversion needs nothing but this page. Ads will not load without a connection; your file will still convert. That is the whole claim, and it takes five seconds to check.

Pulls the audio out of a QuickTime MOV. This is usually an iPhone recording, and it works even though a browser cannot decode iPhone video — because the video track is discarded before anything tries.

Why HEVC is not a problem here

iPhones record video as HEVC (H.265) by default. No browser decodes HEVC outside Safari on Apple hardware, so your MOV may not even play in this browser.

It converts anyway. Extracting audio means locating the audio track in the container and decoding only that; the video track is discarded untouched. The audio is AAC, which every browser decodes.

This is a real advantage of a demux-first design over one that decodes the whole file to convert it.

ProRes and other professional codecs

A MOV from Final Cut or a professional camera may carry ProRes video, which browsers also cannot decode — and again it does not matter, because the video is discarded. The audio in those files is usually uncompressed PCM, which converts to MP3 as a first lossy generation and therefore very cleanly.

How MP3 encoding works without a server

Browsers decode MP3 but do not encode it — there is no MP3 encoder in WebCodecs. The encoding here is LAME, the reference open-source MP3 encoder, compiled to WebAssembly and loaded only when you actually convert to MP3.

It is the same encoder desktop software has used for twenty years, producing standard files that play everywhere. Because it is fetched on demand, pages that convert to WAV or M4A never download it.

Formats a browser genuinely cannot read

The decoding here is the browser's own, which is fast and needs no download — and which has real gaps.

WMA (Windows Media Audio), AC-3 and DTS (cinema surround tracks), AMR (old phone voice recordings) and RealAudio are not decodable by any browser. If your file uses one you are told which, rather than being left with a failure that says nothing.

HEVC video cannot be decoded either — but that does not matter here. Extracting audio discards the video track before anything tries to decode it, so an iPhone recording converts perfectly well even though the browser could not play its picture.

Other names for this

Also searched as “quicktime to mp3”, “iphone video to mp3”, “extract audio from mov”.

Questions

My MOV will not play in the browser but converts fine. Why?
Playing needs the video decoded; converting to MP3 does not. The video track is discarded before decoding, so its codec is irrelevant.
Does it work with Final Cut exports?
Yes. ProRes video is discarded and the PCM audio converts cleanly — in fact better than most sources, since it is lossless to begin with.
Is my file uploaded?
No. The demuxing, decoding and encoding all happen in this tab using the browser’s own media stack plus a WebAssembly encoder. A recording can be an interview, a lecture, a private call — none of it is transmitted. Turn your Wi-Fi off after the page loads and it still works.
How large a file can I convert?
There is no imposed limit, only your device’s memory — around 2 GB in a desktop browser and 400 MB on a phone, since the file is held in memory while it converts. A two-hour video converts in well under a minute on a laptop.
Can I convert several files at once?
Yes. Drop as many as you like, or a whole folder. Each keeps its original name with the new extension, and you can download them individually or as a ZIP.