Any format your browser can decode, including MP3, WAV, OGG, FLAC, AAC, and M4A. The trimmed output is always a lossless WAV file.
No. All processing happens entirely in your browser using the Web Audio API. Your files never leave your device.
Drag the blue handles on the waveform, type exact times in the Start/End fields, or use arrow keys for precise nudging. Scroll on the waveform to zoom in for fine control.
Fade-in gradually increases volume from silence at the start of your selection. Fade-out gradually decreases volume to silence at the end. Both use a linear ramp and are previewed as dark overlays on the waveform.
Normalize analyzes the peak volume of your selection and boosts the entire clip so the loudest point reaches -1 dB. This maximizes perceived loudness without clipping.