Free online audio converter

Convert Audio to M4A Online

Create an M4A output in the browser when AAC/MP4 recording is available. M4A is a compact audio container commonly used on phones, computers, and media apps.

Upload audio file

Drop an audio file here, or choose a file from your device. The converter tries to decode the file locally in your browser.

Choose Audio File

MP3WAVWMAOGGM4R3GPPOPUSM4AAACAMRFLACAIFFAPE

Output format

About M4A conversion

M4A is useful for compact AAC-based audio that can sound good at smaller file sizes when supported by the browser.

M4A output uses the browser MediaRecorder API. If unsupported, use MP3 or WAV as a fallback.

The converter runs in your browser. It accepts common audio extensions such as MP3, WAV, WMA, OGG, M4R, 3GPP, OPUS, M4A, AAC, AMR, FLAC, AIFF, and APE, but actual decoding depends on browser support. Older formats such as WMA, AMR, 3GPP, APE, and exact AAC/MP4 outputs may require server-side conversion.

How to use

How to convert audio to M4A

Upload your audio file. Choose an audio file from your device or drag it into the upload area.
Wait for local decoding. The browser reads the audio file and prepares it for conversion when the format is supported.
Create the M4A output. The page is already set to M4A, so you only need to click the create button.
Download manually. When the output is ready, click the download button yourself. The file does not auto-download.

Formats

Input and output format notes

These are the input extensions accepted by the upload field. Browser support is different from full codec support, so a file can be accepted by the picker but still fail if the browser cannot decode it.