M4A to MP3 Converter

Convert an M4A recording to a listening copy

M4A is a container, not a single audio codec. This tool accepts audio-only M4A containing AAC or Apple Lossless (ALAC), in mono or stereo. It creates a constant-bitrate MP3 for players and workflows that require that format. Embedded cover artwork is allowed, but it is not copied into the MP3 output. Protected files, videos, multiple audio tracks and other codecs are not supported.

How to convert M4A to MP3

1. Export your recording as a local file, then choose it here. The input limit is 30 MiB and ten minutes.
2. Choose 128, 192, 256 or 320 kbps. Start at 192 kbps and compare the result.
3. Optionally add a fade-out. Processing starts from your original file in one export.
4. Create the MP3, listen to the original and result, then download before leaving the page.

Will the MP3 be smaller?

Not always. AAC is already compressed, so a higher-bitrate MP3 can be larger without sounding better. ALAC is lossless and often produces a smaller MP3, but MP3 encoding discards information. The result panel compares actual bytes and explicitly labels an increase as larger. Use the file size calculator for planning, not a guaranteed download size.

Phone recordings and browser playback

Export an actual audio file from your recording app rather than a sharing-page link. Recording apps can use different codecs and containers; an M4A extension alone does not guarantee compatibility. ALAC originals use a locally decoded 16-bit PCM preview because browser ALAC playback varies. This preview can use additional memory and is not a bit-perfect reference for high-resolution recordings. The MP3 export is always generated from your original M4A, not the preview.

Recording apps can export different audio formats. Check the codec and input limits; not every Voice Memos or Android recorder export can be opened. See help for processing or saving errors.

Output and quality

MP3 export is lossy, including when your source is AAC. Increasing bitrate does not restore detail. Mono remains mono and stereo remains stereo; 48 kHz inputs stay at 48 kHz and other accepted rates export at 44.1 kHz. Basic tags are copied where supported, but artwork and all recording metadata are not guaranteed.

Compare settings with the bitrate guide and file size guide. For PCM recordings use WAV to MP3, or browse all tools.

For the full workflow and export checks, read the M4A to MP3 guide.