Turn your WAV files into efficient AAC audio that sounds great while staying small. Conversion runs directly in your browser, so by default your recordings never leave your device.
In “Local” mode your file never leaves your device. No uploads, no server – ideal for sensitive recordings.
Pick “Local” for full privacy or “Server” for very large files and every format.
No sign-up, no queue, no watermark. Choose a file, convert, download.
AAC is the audio codec, while M4A is usually just the container that holds AAC data. They sound identical; AAC often comes as a bare .aac file.
Yes, AAC is lossy, so some of the WAV's detail is removed. At higher bitrates, though, the difference is hard to notice.
No, everything runs locally in your browser by default. For very large files you can optionally switch to a server mode.
AAC is the go-to choice for streaming, YouTube and mobile devices because it still sounds very good at low bitrates while saving storage.