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Audio

Convert MP3 to M4A

M4A is the native audio format of Apple devices and apps such as GarageBand and iMovie. Converting gives you an AAC file that imports cleanly everywhere in the Apple world.

  • Nothing is uploaded
  • Free, no sign-up, no watermark
  • Works offline once loaded

Drop an audio or video file

or choose a file

MP3, WAV, M4A, AAC, OGG, OGA, OPUS, FLAC, WMA and more

Processed on your device. Nothing is uploaded.

Need more audio work, like noise reduction, EQ or batch conversion? Continue in Aback Audio. Open Aback Audio

How to use Audio Converter

  1. 1

    Add the file

    Drop an audio file, or a video to convert its sound, on the drop zone.

  2. 2

    Choose a format

    Under Convert to pick MP3, M4A, WAV, OGG, FLAC or Opus.

  3. 3

    Adjust the settings

    Choose a Bitrate for lossy formats, and optionally a Sample rate and Channels (Stereo or Mono).

  4. 4

    Convert and download

    Press Convert audio, then play the result and Download.

Why use Aback Video for this

  • Any input

    WAV, M4A, AAC, OGG, FLAC, Opus, WMA, AMR, AIFF, voice memos and the sound from video files.

  • Full control

    Bitrate, sample rate and channels, or sensible defaults if you prefer not to choose.

  • Speech settings

    Mono at 16 kHz is ideal for transcription and makes voice files tiny.

  • Private

    Converted in your browser. Your audio is never uploaded.

Frequently asked questions

I want an iPhone ringtone. Is M4A enough?

Ringtones need the .m4r extension and must be 40 seconds or shorter. Use the iPhone Ringtone Maker, which cuts and saves M4R directly.

Will the M4A be smaller than the MP3?

At the same bitrate the size is similar. AAC sounds slightly better than MP3 at low bitrates.

Which format should I convert to?

MP3 for playback anywhere, M4A for Apple devices, WAV or FLAC for editing and archiving, Opus for the smallest voice files.

Can I convert WhatsApp voice notes?

Yes. WhatsApp voice notes are Opus audio in an OGG container; drop them in and convert to MP3.

Does converting MP3 to WAV improve quality?

No. The WAV holds the same sound as the MP3, just uncompressed. It is useful for editors that need WAV, not for better quality.

Should I choose mono?

For speech, mono halves the file size with no loss in clarity. Keep stereo for music.

Is my audio uploaded?

No. FFmpeg converts it inside your browser.

Can I convert on my phone?

Yes. Audio conversion is light and quick in mobile browsers.

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