Voice Changer - Online & Free
...Voice Changer A simple online voice changer app to transform your voice and add effects. Voice Changer can make your voice deeper, make your voice sound like a girl/guy, change and distort your voice so it's anonymous, make you voice sound like a robot, darth vader, a monster, and a tonne of other - best of all, Voice Changer is free!...
https://voicechanger.io/
Voice Maker - Create a Voice - Online & Free
...This effect alters the pitch of the audio. If you set a positive value then the voice will be high-pitched (like a small child or a chipmunk), and if you set a negative value then the voice will be deep (like a big troll or a demon). A value of zero is neutral (no effect). You can of couse apply this effect multiple times in a row to make it deeper/higher than the min/max values allowed by the ......
https://voicechanger.io/voicemaker/#!/{%22effects%22:[{%22name%22:%22pitchShift%22,%22params%22:{%22shift%22:2}}],%22version%22:1}