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Convert MP3 to WAV

MP3 · M4A · WAV · FLAC · OGG · OGA · WebM · AAC · OPUS · MP4 · MOV · MKV

Converting happens in your browser, so your file never leaves your device. Transcribing uploads the audio to SeaMeet.

Choose an MP3 and your browser writes it out as a WAV for software that won't take MP3.

How it works

  1. Choose the MP3 you need as a WAV.
  2. Turn on Mono if the tool wants it, then select Convert & download.
  3. Save the WAV, or transcribe the recording.

When a program insists on WAV

Some places still take only WAV. Office phone systems want on-hold music and greetings in WAV, often mono. Hardware samplers, older music software, game engines, announcement systems, broadcast playout software and speech research tools can be the same. If your sound exists only as an MP3, converting is the way in.

Be clear about what this does. An MP3 has already thrown away part of the sound to stay small, and converting it to WAV can't bring that back. The WAV is a bigger, uncompressed copy of the MP3 as it is now, which is exactly what those systems need, but it won't sound better. If you still have the original recording, convert that instead.

The conversion runs in your browser, so the MP3 isn't uploaded. Mono is there for phone systems and announcement tools that ask for one channel. And if the MP3 is a recording of people talking, Transcribe this file sends it to SeaMeet for a transcript.

Questions

Is the MP3 uploaded to convert it?

No. The MP3 is decoded and written as WAV inside your browser, on your own device, and never sent to a server for that. Choosing Transcribe this file is separate: it uploads the audio to SeaMeet.

How large an MP3 can I convert?

There is no upload, so your device sets the limit. The WAV will be many times bigger than the MP3, so check your free storage; a recording of many hours may be too long for one WAV. For transcription, one file may be up to 512 MB and 5 hours.

Will converting to WAV improve the sound?

No. WAV stores the sound uncompressed as standard sixteen-bit audio, but whatever the MP3 encoder removed is gone for good. The WAV carries the MP3's sound in a format more programs accept, at a much larger size. It doesn't restore any detail.

My phone system needs a mono WAV. Can I make one?

Yes. Turn on Mono before you convert and the WAV has a single channel, which is what most phone systems and announcement players ask for. The WAV keeps the MP3's sample rate, so if the system names a specific rate, check its manual first.