Audio to WAV Converter
Convert MP3, M4A, AAC, Ogg or FLAC into uncompressed WAV, the format editors, samplers and transcription tools expect. Runs in your browser.
Convert MP3, M4A, Ogg or FLAC to uncompressed WAV, the format editors and transcription tools expect.
Source
Add a file to see what it contains.
A note on the sample rate, because it is the one thing here that is not transparent. Browsers decode audio through an audio context, and that context resamples everything to the rate it runs at, so the file's own rate is already gone by the time there is anything to write out. For a WAV the rate is read from the header first and kept. For MP3, M4A and the rest it cannot be known without a parser for each format, so the rate is yours to choose and the panel shows what the output actually has rather than what the input had.
Worth being clear about what this can and cannot do. Browsers include decoders for MP3, AAC, Ogg and FLAC, so almost any file you have can be read here, but they include no encoders for those formats. WAV is the only thing that can be written without shipping a codec of several megabytes to every visitor.
WAV is the right format when something else is going to process the audio: editors, transcription and speech tools, samplers and hardware players all take it, and many take nothing else. It is the wrong format for sending to someone or putting on a website, where the size makes it impractical.
Converting a lossy file to WAV does not restore quality. What was thrown away by the MP3 encoder is gone; the WAV simply stops throwing away anything more, which is what matters if the file is about to be edited and re-encoded.
About the audio to wav converter
Worth saying plainly, because most sites in this category are not straight about it: a browser can decode almost any audio format but can only encode WAV. The decoders ship with the browser because playback needs them. The encoders do not, and adding one means sending several megabytes of codec to every visitor. So this converts to WAV and nothing else.
That turns out to cover the case that actually matters. WAV is what you need when something else is going to process the audio: editors, transcription and speech tools, samplers and hardware players all take it, and a good many take nothing else.
Bit depth and a mono mixdown are yours to set, because the right answer depends on where the file is going. Nothing is uploaded; the audio is decoded and re-written on your own machine.
How to use it
- 1Drop in an audio file.
- 2Choose a bit depth: 16 for general use, 24 or 32 if it is going into an editor.
- 3Tick mono if the source is speech, which halves the size.
- 4Download the WAV.
Questions
Can this convert to MP3?
No, and no browser-based tool can without shipping a large encoder. Browsers include decoders for MP3 and AAC because playback needs them, but no encoders. WAV is the only format that can be written honestly here.
Why is the WAV so much bigger than my MP3?
Because WAV stores every sample uncompressed, which is the whole point of it. Ten to one against an MP3 is normal. That size is the reason WAV is right for editing and wrong for sharing.
Does converting an MP3 to WAV improve the quality?
No. What the MP3 encoder discarded is gone for good. What the WAV does is stop discarding anything more, which matters if the file is about to be edited and re-encoded.
Which bit depth should I choose?
16 bit for general use and anything being handed to a transcription tool. 24 bit if it is going into an editor and will have effects applied, since the extra headroom keeps processing artefacts below hearing. 32 bit float only for mastering.
Which formats can it read?
Whatever your browser can play, which in practice means MP3, WAV, M4A, AAC, Ogg, Opus and usually FLAC. It cannot read WMA or anything with DRM.
Is my audio uploaded?
No. It is decoded and written back on your own device.