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Convert OPUS to M4R

Turn any OPUS into a real iPhone ringtone. M4R files are AAC audio, cut to the 30-second limit iOS accepts.

  • No upload — 100% private
  • Fast, lossless when possible
  • Free & unlimited
  • Works on iPhone & Android

    Trim (optional)
    Use minutes:seconds, e.g. 1:05.5
    Quality
    Advanced options

    How to convert OPUS to M4R

    1. 1

      Tap Choose files and select one or more OPUS files (or drag them in).

    2. 2

      Check that M4R is selected. Use Advanced options for bitrate, channels or trimming.

    3. 3

      Press Convert. Everything happens on your device — no upload, no waiting in a queue.

    4. 4

      Your M4R downloads automatically. Converting several files? Grab them all as a ZIP.

    OPUS vs M4R

    Both formats are lossy, so the audio is re-encoded once. Pick High quality to keep it as close to the original as possible, or Small for the smallest file.

    OPUSM4R
    Full nameOpus AudioiPhone Ringtone (AAC)
    TypeAudioAudio
    CompressionLossyLossy
    Developed byIETF / Xiph.OrgApple
    Introduced20122007
    Plays on iPhone◐ Partly / with an app✓ Yes
    Plays on Android✓ Yes✕ No
    Plays on Windows✓ Yes◐ Partly / with an app
    Plays on Mac✓ Yes✓ Yes

    About OPUS and M4R

    OPUS: Opus is a modern, highly efficient codec used by WhatsApp voice notes, Discord, Zoom and WebRTC calls. It sounds excellent even at very low bitrates.

    M4R: M4R is the iPhone ringtone format. It is an AAC audio file (the same as M4A) with a different extension, and iOS only accepts ringtones up to 30–40 seconds long.

    Frequently asked questions

    How do I convert OPUS to M4R on my phone?
    Open this page in your phone's browser (Safari, Chrome, Samsung Internet), tap Choose files, pick your OPUS, make sure M4R is selected and tap Convert. The M4R file is saved to your Downloads.
    How long can an iPhone ringtone be?
    Keep it to 30 seconds. If your file is longer, set a start time under Advanced → Trim and the next 30 seconds are used. For a visual editor, try the iPhone Ringtone Maker.
    Will converting OPUS to M4R reduce quality?
    Both formats are lossy, so the audio is re-encoded once. Pick High quality to keep it as close to the original as possible, or Small for the smallest file.
    Is this OPUS to M4R converter free?
    Yes — completely free with no limits on the number of files, no watermark and no account. The site is supported by ads.
    Are my files uploaded to a server?
    No. The converter runs inside your browser using WebAssembly, so your files never leave your device. That's also why it works for private and confidential recordings.

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    Convert OPUS to other formats

    OPUS to MP3OPUS to M4AOPUS to AACOPUS to ALACOPUS to WAVOPUS to FLACOPUS to OGGOPUS to WEBAOPUS to WMAOPUS to AIFFOPUS to AC3OPUS to CAF

    Convert other formats to M4R

    MP3 to M4RM4A to M4RAAC to M4RALAC to M4RWAV to M4RFLAC to M4ROGG to M4RWEBA to M4RWMA to M4RAIFF to M4RAC3 to M4RCAF to M4RAMR to M4R3GA to M4RAPE to M4RMP4 to M4RMOV to M4RMKV to M4RWEBM to M4RAVI to M4RFLV to M4RWMV to M4R3GP to M4RM4V to M4RMPG to M4RTS to M4RGIF to M4RMTS to M4RVOB to M4RHEVC to M4RRMVB to M4R

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