Audio Format Converter
Convert MP3, M4A, OGG, Opus, FLAC or WebM audio to WAV in your browser, with control over sample rate, channels and bit depth.
Drag & drop an audio file here, or click to browse
MP3, M4A/AAC, OGG, Opus, FLAC, WebM or WAV — whatever your browser can decode. No uploads. Your files stay on your device.
Pick an audio file to convert. Everything runs in this tab — nothing is uploaded.
This browser has no Web Audio support, so audio can’t be decoded here. Try the latest Chrome, Edge, Firefox or Safari.
Source file
Convert to
The source sample rate is read from the file header. For M4A/AAC and WebM files it cannot always be read, so pick a rate explicitly if you need an exact match.
Converted file
How it works
Drop in an audio file and the browser’s own Web Audio API decodes it — MP3, M4A/AAC, OGG, Opus, FLAC, WebM and WAV all work in modern browsers. The file header is read first to find its native sample rate, the audio is then decoded straight into an OfflineAudioContext at the rate you chose (which also handles high-quality resampling and stereo-to-mono down-mixing), and the samples are written out as a standard RIFF/WAVE file at 16-bit, 24-bit or 32-bit float. Because WAV is uncompressed, the result is lossless from the point where your file was decoded: nothing further is thrown away, though a file that started life as a 128 kbps MP3 will not magically regain the detail that encoder discarded. Lower the sample rate or switch to mono when you want a smaller file for speech, transcription or embedded use. Everything happens inside this tab — no upload, no queue, no account — so private recordings, interviews and unreleased music never leave your device.
Frequently asked questions
How do I convert audio without uploading it anywhere?
Drop your file on this page. The browser's own Web Audio API decodes it locally, resamples it in an OfflineAudioContext and writes a standard WAV file, all inside this tab. There is no server, no queue and no link that could be shared by accident — close the tab and every trace is gone. That makes it safe for interviews, voice notes, client recordings and unreleased music.
Which formats can I convert, and why is the output always WAV?
Anything your browser can decode goes in: MP3, M4A/AAC, OGG, Opus, FLAC, WebM and WAV all work in modern Chrome, Edge, Firefox and Safari. Output is WAV (16-bit, 24-bit or 32-bit float) because browsers can decode compressed audio but cannot encode MP3 or AAC natively — doing that in-page would need a multi-megabyte encoder download. WAV is uncompressed and opens in every editor, DAW and transcription tool.
Does converting to WAV lose quality?
No quality is lost in the conversion itself: WAV is uncompressed, so the decoded samples are written out exactly as they are. What a lossy source already threw away is gone for good, though — a 128 kbps MP3 turned into a WAV sounds like a 128 kbps MP3, just in a bigger file. Keep the source sample rate for the most faithful result, and only lower it (or switch to mono) when you deliberately want a smaller file for speech.