Free tool

Audio converter MP3, WAV, M4A, OGG or FLAC,.

Drop any audio file, or a video, and download it in the format you need. Pick the bitrate, keep stereo or go mono, several files at once.

Audio converter at a glance

content.win converts with no queue and no daily cap: a whole album goes through as fast as your computer can encode it.

Works with
MP3, WAV, M4A, AAC, OGG, FLAC, AIFF, and the sound of an MP4, MOV or WebM.
Comes back as
MP3, WAV, M4A (AAC), OGG (Opus) or FLAC, the full length, named after the original.
Runs
In your browser.
Limits
No daily limit and no cap on how many files.
Price
Free. No account, no watermark.

How to convert an audio file

  1. Drop the files in. Any audio format the browser plays, or a video when you only want its sound. Several at once is fine.
  2. Pick the format and the bitrate. MP3 for players and phones, WAV or FLAC for editing and archiving, M4A for Apple devices, OGG for the smallest files. 128 kbps suits speech, 192 music, 320 when every detail matters.
  3. Download. Each file gets its own player and Download button; one button takes them all.

Which format to pick

MP3
Plays everywhere. 192 kbps is transparent for most music; 128 kbps mono is small and clear for speech.
WAV
Uncompressed, the format editors and DAWs want. About 10 MB a minute in stereo.
M4A (AAC)
What Apple devices and iTunes use. Sounds a little better than MP3 at the same bitrate.
OGG (Opus)
The smallest files for a given quality; fine for voice notes, podcasts and anything played on a computer or phone app.
FLAC
Lossless and about half the size of WAV. For archiving music without losing anything.

About quality

  • Converting between lossy formats (MP3, M4A, OGG) re-encodes the sound once. At 192 kbps or above the difference is inaudible to almost everyone. Converting a lossy file to WAV or FLAC keeps exactly what the file had; it cannot add what was lost when it was first compressed.
  • For a smaller file, drop the bitrate or switch to mono; a spoken recording loses nothing in mono.

Questions people ask

Which formats can I convert?

MP3, WAV, M4A, AAC, OGG, FLAC and AIFF in, and the sound of MP4, MOV and WebM videos. Out: MP3, WAV, M4A, OGG and FLAC. M4A, OGG and FLAC depend on the browser; Chrome and Edge make all of them.

Does converting lose quality?

Only between lossy formats, and at 192 kbps or above the difference is inaudible to almost everyone. WAV and FLAC are lossless.

How big will the MP3 be?

About 1 MB per minute at 128 kbps, 1.4 MB at 192, 2.3 MB at 320. Mono halves those.

Can I convert several files at once?

Yes. Drop them all; each comes back named after the original, and one button downloads the lot.

Can I convert a video to audio?

Yes. Drop the video; only its sound is read and converted.