MP3 to M4A

Convert MP3 audio into AAC in an M4A container with explicit bitrate controls.

Private browser workspaceInput: MP3 → Output: M4A / AAC

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Your file never leaves this browser

Processing happens locally using browser APIs and on-device code. Closing this tab clears the working data.

How it works

Done in three simple steps

Choose mp3 from your device.

Choose the available options and process the input locally.

Review the result, then download it to your device.

Good to know

Is the file simply renamed from MP3 to M4A?+

No. The audio is decoded, encoded as AAC and written into an MP4-family audio container.

Are my files uploaded?+

No. Processing happens on this device. The tool may download its own code, but source files and output are not sent to a processing server.