AAC Converter
Convert audio to AAC (M4A).
Trim & fade options
Trim applies to every file in the queue. Leave blank to keep the full length.
This free AAC converter encodes audio into efficient AAC (.m4a) files — the format used by Apple Music, YouTube and modern streaming. Drop in MP3, WAV, FLAC, OGG, M4A or the audio track of common video files (MP4, MOV, MKV, WebM and more) and get back a compact AAC file. There is no queue and no file-size limit.
Convert one file or a whole batch at once with drag and drop, then download each result individually or grab them all as a single ZIP. Choose the target bitrate from 64 kbps (voice) up to 256 kbps, set the sample rate and channel layout, or keep the originals. A one-click EBU R128 loudness normalize evens out volume across tracks — a step most online converters do not offer.
The trim and fade controls let you cut a clip to a start and end point and add fade-in or fade-out without a separate editor, and an inline player previews the converted audio before you save it. Because the conversion happens on your device rather than a remote server, your recordings stay private and nothing is retained after you close the tab.