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M4A to WAV

Turn an unencrypted M4A recording into a 16-bit PCM WAV file for audio editing or another PCM workflow. Choose the sample rate and mono or stereo output.

Audio and transcripts stay on your device. Processing runs in your browser.
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Choose a file

M4A. Up to 100 MiB per file (50 MiB on touch devices), 1800 seconds. Decoded audio memory limits also apply.

    Settings

    Bitrate applies to MP3 and AAC. WAV uses 16-bit PCM; FLAC is lossless. OGG uses quality-based encoding.

    Result

    Your result will appear here

    Add a file, pick your settings, then select Convert audio.

    No account or daily usage quota. File and device limits protect your browser from running out of memory.

    Processing audio

    Checking your settings…

    How to use M4A to WAV

    1. Choose your M4A file from your device. The page checks the extension, file header and readable duration.
    2. The output format is fixed to WAV for this converter.
    3. Set the sample rate and mono or stereo channels. Bitrate does not apply to uncompressed WAV.
    4. Press Convert audio. The processing engine loads only when needed.
    5. Play the result and download it when it suits your needs.

    Choose the PCM settings your editor expects

    WAV output uses 16-bit PCM at the selected sample rate. Use the rate required by the project receiving the file; 44,100 Hz and 48,000 Hz are common audio workflow choices. Resampling changes the sample grid, not the quality of the original recording.

    An AAC source remains limited by its lossy encode. ALAC is lossless, but converting higher bit depth audio to this tool’s 16-bit output can discard precision. Browser support for the source codec is required before conversion.

    A practical workflow

    Use M4A to WAV when a receiving app requests WAV. Convert a short recording first, listen to the loudest and quietest passages, and keep both the source and the result until you have checked playback.

    To remove an unwanted section from an MP3 copy, open MP3 Cutter. To reduce the bitrate of an existing MP3, use MP3 Compressor.

    Before you download

    • Only a readable, supported audio stream can be converted. Encrypted files and damaged media are unsupported.
    • Large files may exceed browser memory even when their compressed size fits the displayed limit.
    • Changing format does not guarantee a smaller file or better sound. Output tags and artwork may differ from the source.

    Frequently asked questions

    Will every M4A recording convert to WAV?

    The file must be unencrypted and its audio codec must decode in your browser. AAC and ALAC support varies. This tool writes 16-bit PCM WAV, so it is not a bit-perfect high-resolution archive converter.

    Is my M4A file uploaded?

    No. The file is read and processed in your browser. The audio engine downloads from this site, but the selected media is not sent to a server.

    Can I choose mono output?

    Yes. Choose Mono under Channels. This downmixes the recording into one channel; it does not isolate a voice or remove background music.

    Why can a file fail below the size limit?

    Compressed size does not describe decoded memory use. Duration, sample rate, channels, codec support and available browser memory also affect whether processing succeeds.

    Often used together with M4A to WAV.

    • Audio Converter

      Convert between common audio formats with bitrate and channel controls.

    • MP3 Compressor

      Reduce MP3 bitrate and compare the output size before downloading.

    • MP3 Cutter

      Trim MP3 audio with waveform positioning and exact time fields.