Vocal Doubler
Thicken a vocal (or any) clip by blending it with a very short-delayed copy of itself — a cheap stand-in for recording two takes and layering them.
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About this tool
Real vocal doubling comes from singing the same line twice and layering the takes — the tiny natural differences in timing and pitch between takes is what gives a thick, wide sound. This tool fakes that with a single short delay (typically 15-35ms, too short to hear as a distinct echo) mixed back in, which is a common cheap substitute when you only have one take.
Change the settings and press Play again to hear the difference: the effect is applied afresh from your original file each time, and Download saves it with the current settings.