Free online audio converter

Convert Audio to AAC Online

Create an AAC output when the current browser supports AAC recording. AAC is commonly used for efficient audio compression and mobile-friendly playback.

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 AAC conversion

AAC is useful for compact audio files, mobile playback, and situations where AAC support is preferred over MP3.

AAC output support varies by browser. If the output fails, try Safari or export MP3/WAV instead.

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 AAC

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 AAC output. The page is already set to AAC, 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.