Audio editor — free online tool

What to know

The editor puts six operations behind one set of tabs: Trim, Speed, Volume, Fade, EQ and Mix. It accepts MP3, WAV, M4A, AAC, FLAC, OGG, Opus and WebM audio and exports MP3, M4A or WAV, with the same bitrate, sample rate and channel menus as the converter.

Trim and Mix are visual. In Trim you drag the start and end handles on the waveform and the selected range is shown as a time span against the file length. In Mix you drag each layer block along the timeline to set its delay, from 0 to 600 seconds, and move its Level slider between 0 and 200 percent.

Each export applies the active tab only. A common order is Trim first, then EQ, then Volume, and Fade last, because the fade-out is placed relative to the end of the file you load, so fading before trimming puts the ramp in the wrong spot.

Mix keeps the first file as the source and accepts up to seven more layers. The result lasts as long as the longest layer plus its delay, and the sum is not normalized, so loud layers can clip. Keep each level below 100 percent when stacking more than two tracks.

Use the dedicated tools for single jobs, and the editor when you want to switch between operations without leaving the waveform view.