M4A to MP3 converter

Convert M4A audio to MP3 in your browser, with no upload.

    Drop M4A files here or choose files.

    • Up to 500MB and 60 minutes per file
    • Up to 10 files at a time

    192kbps is enough for music. Use 128kbps for lectures and call recordings, 320kbps for a music archive.

    Mono merges left and right into one channel and reduces the file size (WAV drops by half). Good for voice recordings.

    You are unlikely to hear a difference either way. Pick 48kHz if the audio is going back into a video editor.

    Leave blank to start from the beginning. Write 90 or 1:30.

    Leave blank to go to the end. With several files, the same range is applied to each.

    Files never leave this device. Privacy policy

    Result

    Upload a M4A file and click Convert. The MP3 file will appear here.

    What to do next

    M4A to WAV converter

    When you need uncompressed WAV for editing.

    Extract audio from video

    Save just the audio from a video file as MP3 or WAV.

    AAC to MP3 converter

    Audio with an .aac extension converts the same way.

    How it works

    Choose a M4A file and click Convert. The tool saves it as MP3. Upload several files and they convert one after another. Save the results one at a time or as a ZIP.

    Pick 128, 192 or 320kbps. For voice recordings, 128kbps in mono cuts the file size a lot. Enter a start and end time to save only that part.

    Things to know

    The browser decodes the audio itself, so if it does not recognize the codec inside the file, the conversion cannot run. The tool tells you why, and trying again in Chrome on a desktop usually works.

    Long files use a lot of memory, so the limit is 60 minutes. If a large file stalls on a phone, try it on a computer.

    Frequently asked questions

    Does it work with iPhone Voice Memos?

    Yes. Voice Memos are saved as M4A (AAC). Share the memo, save it to Files, then upload it here. For voice-only recordings such as calls, mono at 128kbps is plenty.

    Does converting to MP3 lower the quality?

    MP3 is a lossy format, so the result is not identical to the source. At 192kbps or higher, most people cannot hear a difference. Since the source audio is usually compressed already (AAC, for example), a higher bitrate will not make it sound better than the original.

    Are my files uploaded to a server?

    No. Decoding and converting happen entirely in this browser, and the file never leaves your device. The result disappears when you close the page, so use the save button to download it.

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