Free is enough for most one-off jobs. Pro raises the file and batch caps; Pro + Media unlocks GB-scale streaming and unlimited duration.
Larger files supported on Developer (5 GB CSV) and Enterprise (unlimited). All processing happens in your browser — files never reach a server.
Drop your M4A or AAC file
Choose MP3 bitrate
Download with metadata preserved
0 bytes uploaded. M4A to MP3 Converter runs entirely in your browser using FFmpeg.wasm 8.1, RNNoise, and the Web Audio API. Your audio stays on your device at all times. No data is sent to any server — critical for sensitive interviews and confidential calls.
M4A isn't supported on every device or DAW. MP3 is the universal format — older car stereos, podcast platforms, and embedded systems all accept it.