Keyshifter X

About

Keyshifter X is a powerful, lightweight browser extension that gives you total control over your audio on YouTube and Spotify. 
Whether you are a musician practicing a song in a different key, a dancer needing to slow down a fast track, or an audiophile looking to tweak the EQ, Keyshifter X handles it seamlessly in real-time.

Key Features
Real-Time Pitch Shifting: Transpose the pitch of any song up or down by semitones (-12 to +12) without changing the playback speed.  
Playback Speed Control: Speed up or slow down audio smoothly from 25% to 400% without distorting the original pitch.  
10-Band Equalizer: Fine-tune your audio profile using the built-in 10-band EQ, or choose from quick custom presets like Bass, Vocal, and Treble.  
Seamless Integration: Designed to work flawlessly right out of the box on both YouTube and Spotify web players.  
Audio Visualizer: Enjoy a sleek, built-in real-time audio frequency visualizer directly in the extension menu.  
Keyboard Shortcuts: Make adjustments on the fly without clicking. 
Use your arrow keys (Up/Down for pitch, Left/Right for speed) and hit 'R' to instantly reset everything.

Privacy First
Keyshifter X runs entirely locally within your browser. 
It requires no sign-ups, makes no external network requests, and collects zero personal data.