Online Audio Converter

Getting an audio file into the format a device or app actually accepts is a chore, and Online Audio Converter handles it in the browser with nothing to install.

It is a free audio converter that takes files in over 300 formats, video included, and outputs mp3, wav, m4a, flac, ogg, amr, mp2, or m4r for iPhone ringtones.

You can pull the audio track out of a video file, then set quality, bitrate, frequency, and the number of channels.

Reverse playback and fade in are available, and Online Audio Converter can also remove a voice from a track, which is handy for rough karaoke versions.

Expect a basic vocal remover rather than a studio tool.

Batch conversion is supported.

Several files can be processed at once and downloaded together as a ZIP archive, which saves time on larger folders.

You can also edit the track name, artist, album, year, and genre.

Tags work for mp3, ogg, flac, and wav.

The workflow is simple: upload the file, pick a format and quality, and download the result.