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Audio to WAV

Free online tool to convert MP3, M4A, AAC, OGG, OPUS, WebM, FLAC, and other audio files to WAV locally in your browser

Upload audio

Output audio

Choose a file and start processing. The output audio will appear here.

About this tool

WAV commonly stores uncompressed PCM. It is large but structurally simple and useful for editing, analysis, and reliable intermediate exchange. Converting to WAV decodes a source into samples and cannot restore sound discarded by lossy MP3 or AAC.

The browser-generated WAV can feed editing, transcription, or audio analysis. Size depends on duration, sample rate, bit depth, and channel count, so long recordings can consume substantial memory and storage.

How to use it

  1. Upload the source

    Check duration and source quality and anticipate a much larger uncompressed output.

  2. Convert to WAV

    Keep the page open while full decoding and encoding completes.

  3. Verify in the destination

    Listen to the beginning and end and check sample rate and channels in the target editor.

Supported range and limits

Input formats
MP3, M4A / AAC, OGG, FLAC, WebM; anything the browser can decode
Output
WAV, an uncompressed PCM container, with no second lossy encode
File size
Far larger than the source: roughly 10 MB per minute at 44.1 kHz / 16-bit / stereo
Can it restore quality
No. WAV from a lossy source just packages the already-degraded result losslessly
Good downstream for
Audio editors, processing chains that need exact samples, anywhere lossy input is rejected
Where it runs
FFmpeg compiled to WebAssembly in your browser; the file is never uploaded

When you would use it

  • Preparing an editing intermediate

    Convert compressed audio into a WAV that editing or signal-processing software reads reliably.

  • Creating an analysis input

    Provide a PCM container to waveform tools, speech models, or older compatible systems.

  • Feeding a pipeline that rejects lossy input

    Some analysis tools, speech models and mastering chains require uncompressed PCM, so WAV is the entry ticket.

What to know before you start

  • A larger WAV does not improve source quality; it only avoids another lossy output stage.
  • Very long or high-rate files can exceed browser memory and should be handled in segments.
  • WAV can contain multiple encodings, so inspect the downloaded file for its exact parameters.

Related concepts

PCM
A common digital representation recording amplitude values at a fixed sampling rate.
sample rate
Samples recorded per second, such as 44.1 kHz meaning 44,100 samples each second.

Frequently asked questions

Does converting to WAV upload my file?
No. MP3, M4A, FLAC and other audio are decoded and exported to WAV locally in your browser, with no upload.
Why convert to WAV?
WAV is a lossless, uncompressed format, ideal for further editing, mixing or any workflow that needs high fidelity.
Which input formats are supported?
It accepts common formats like MP3, M4A, OGG, FLAC and WebM, all exported as WAV.
Does converting to WAV improve quality?
No. WAV is just a lossless container, and WAV made from an MP3 still holds already-degraded audio. Its value is that later processing adds no further loss, not that anything is recovered.
Why is the file so large?
WAV is uncompressed. At 44.1 kHz / 16-bit / stereo it runs about 10 MB per minute, more than ten times a 128 kbps MP3. That is the inherent cost of lossless storage.
When should I choose WAV over MP3?
When you will keep editing, when exact samples matter, or when something downstream refuses lossy input. For listening and sharing, MP3's size advantage is decisive.

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