Audio converter for MP3, WAV, FLAC and M4A

What can I convert to MP3, WAV or FLAC?

Open an MP3, WAV, FLAC, M4A, OGG or Opus file, or the soundtrack of an MP4, MOV, WebM or 3GP video. Video soundtracks open on desktop Chrome, Edge and Firefox. The converter writes MP3, WAV and FLAC in every browser, and M4A in browsers that support it. WMA and AIFF files are not read by the browsers we tested, so they are refused with a clear message. Nothing is uploaded and there is no signup.

How do I convert an audio file?

1. Drop in a file, or choose one.
2. Pick the format to convert to, and a quality if you want something other than Balanced.
3. Press Convert, then Download.

Your file stays open afterwards, so you can normalise it or cut it without choosing it again.

Which format and bitrate should I choose?

MP3 is the format almost every player accepts. Its four presets are Best (320 kbps), Balanced (192), Smaller (128) and Voice (64, for speech), and the page shows the expected size before you start. WAV is uncompressed 16-bit audio: large, but a faithful copy of what was decoded. FLAC holds the same sound as WAV in a smaller file. M4A is AAC audio, listed only where your browser can encode it. Whatever you pick, the output is 44.1 kHz.

Does converting make the audio sound better?

No. Turning an MP3 into WAV or FLAC makes the file bigger, but it cannot bring back detail that compression already removed. Going from one lossy format to another, such as M4A to MP3, costs a little more quality. The cleanest route is to convert from the original WAV or FLAC.

Can I make an iPhone ringtone?

Where your browser can encode AAC, choose iPhone ringtone (M4R) in the format list. A ringtone is limited to 40 seconds, so for a longer song, trim the part you want first. To make a file smaller rather than change its format, use compress audio.