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Libre Audio Converter

Convert audio between MP3, WAV, FLAC, OGG, AAC, and M4A with bitrate control. Perfect for M4A to MP3. Everything is processed locally in your browser.

Sen límite de tamaño de ficheiroOs ficheiros permanecen privadosNon é necesario iniciar sesiónLibre para sempre

Solta ficheiros aquí ou fai clic para buscar

MP3, WAV, FLAC, OGG, AAC, M4A, Audio sen límite de tamaño de ficheiro

Explorar ficheiros

Os teus ficheiros nunca saen do teu dispositivo. Todo o procesamento realízase localmente no teu navegador.

Optimize for your platform

Convert M4A to MP3 Convert WAV to MP3 Convert FLAC to MP3 Convert Audio to WAV Convert Audio for a Podcast

Como funciona

Most "convert M4A to MP3" sites upload your audio to a server. This one runs the real FFmpeg encoder inside your browser — your files stay on your device.

1
FFmpeg.wasm loads once
The WebAssembly build of FFmpeg (~30 MB) downloads the first time you use a media tool, then is cached for instant reuse.
2
You choose a format and bitrate
Your audio is loaded into FFmpeg's in-memory filesystem. Nothing is sent anywhere.
3
FFmpeg re-encodes the audio
MP3 (libmp3lame), AAC, Vorbis (OGG), or lossless FLAC/WAV — the same encoders desktop FFmpeg uses, running locally on your CPU.
4
The converted file is offered for download
The result is handed back as a downloadable blob and can be previewed with the built-in player.