audioalter.com
Audioalter is a collection of web-based audio tools. Effects include 3D Audio, Auto Panner, Bass Booster, Equalizer, Noise Reducer, Pitch Shifter, Reverb, Reverse Audio, Stereo Panner, Tempo Changer, Trimmer / Cutter, Vocal Remover and Volume Changer. Other tools include a BPM Detector, Converter, Downmixer, Spectrogram Image and Waveform Image, plus presets.