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Convert M4A to OPUS

Counter M4A → OPUS
Drop your files here .m4a .m4b

    Some older players, car stereos and Windows programs will not play M4A. Opus gives the best quality at low bitrates and is very efficient for speech.

    • Free
    • No sign-up
    • Batch conversion

    Why convert M4A to OPUS?

    To convert M4A files to OPUS, drop them on the counter above.

    Most files convert in seconds: no queue, no email address, and the OPUS result saves straight to your computer or phone.

    How to convert M4A to OPUS

    1. Add your M4A files

      Drag your M4A files onto the counter or pick them with Choose files. You can add several at once.

    2. Check the settings

      The defaults suit most cases. Change quality, size or other options if you like; after a change, one click converts again.

    3. Conversion starts by itself

      Each file is converted to OPUS and its row is stamped CONVERTED.

    4. Download your OPUS file

      Get the file with Download. With several files you can download them all as one ZIP.

    M4A vs OPUS

    PropertyM4AOPUS
    Full nameMPEG-4 AudioOpus Interactive Audio Codec
    TypeAudioAudio
    CompressionLossyLossy
    Created byMPEG; Apple yaygınlaştırdıIETF (RFC 6716)
    Year—2012
    Extensions.m4a .m4b.opus
    MIMEaudio/mp4audio/opus

    About the formats

    M4A

    MPEG-4 Audio

    M4A is an MPEG-4 container that usually carries AAC audio. iPhone voice memos, iTunes music and many saved voice clips are M4A.

    All M4A conversions

    OPUS

    Opus Interactive Audio Codec

    Opus is an open audio codec for speech and music with very low latency. WhatsApp voice notes are saved as .opus files.

    All OPUS conversions

    Frequently asked questions

    Is converting M4A to OPUS free?

    Yes, completely free. No account, no daily limit, no watermark and no queue.

    Does it work on a phone?

    Yes. It works on iPhone, iPad and Android, with no app to install.

    Is there a file size limit?

    There is no size limit set by us. Files of hundreds of MB convert too; very large files take longer and are handled more comfortably on a computer than on a phone.

    Other conversions
    Family Give → Get What you gain
    OPUS M4A better than MP3 at the same size
    M4A MP3 plays on every device
    M4A WAV lossless, ready to edit · larger file
    M4A AAC broadcast-grade audio
    M4A OGG open and royalty-free
    M4A FLAC lossless at half size · larger file
    MP3 OPUS most efficient for speech · MP3 recording
    WAV OPUS most efficient for speech · studio recording
    AAC OPUS most efficient for speech · raw AAC stream
    OGG OPUS most efficient for speech · Telegram voice message
    FLAC OPUS most efficient for speech · lossless archive
    WMA OPUS most efficient for speech · old Windows Media audio