PitchKey

Real-time pitch shifter for YouTube with convolution reverb. Transpose ±12 semitones, control speed, and add studio-quality reverb.

PitchKey is a real-time audio studio for YouTube. Move any video up or down by up to 12 semitones (one octave) without changing tempo, adjust playback speed independently from 0.25× to 4×, and add studio-quality convolution reverb — all in a clean popup that works on any YouTube tab. Built for musicians, vocalists, music students, and anyone who wants better control over the sound of their music. WHO IT'S FOR • Singers transposing songs to a comfortable vocal range • Guitarists and pianists matching a key during practice • Music students working on ear training and key recognition • Producers reverse-engineering arrangements • Vocal coaches and choir directors • Anyone who wants to slow a track down for close listening — without the chipmunk effect FEATURES • ±12 semitones (one full octave each direction) • Tempo-preserved pitch shifting using the WSOLA algorithm • Independent speed control: 0.25× to 4× with a logarithmic slider • Convolution reverb with dry/wet mix (NEW in v1.0.1) • Smart formant correction reduces "chipmunk" effect at extreme pitch shifts • Bidirectional vocal warmth correction for natural sound at any pitch • Adaptive smoothing keeps slow-speed playback artifact-free • Subtle analog-style polish for studio-quality output • Persistent settings remembered between sessions • One-click reset WHAT'S NEW IN v1.0.1 • Studio-quality convolution reverb with dry/wet mix slider • Smart chipmunk reduction for natural-sounding high pitch shifts • Improved mud cleanup for low pitch shifts (down to -12 semitones) • Smoother slow-speed playback (0.25×–0.99×) • Subtle "air" boost above 10 kHz adds clarity and openness • Latency-free signal chain — all enhancements run in real time PRIVACY PitchKey is local-only. No analytics, no telemetry, no accounts, no network requests. Your settings are stored on your device and never transmitted. OPEN SOURCE PitchKey uses the open-source SoundTouchJS audio worklet (LGPL-2.1) for pitch shifting. Full license attribution is included in the extension package. DISCLAIMER PitchKey is an independent project and is not affiliated with, endorsed, sponsored by, or otherwise officially connected to YouTube, Google LLC, or Alphabet Inc. "YouTube" is a trademark of Google LLC, used here only to describe the platform PitchKey operates on. Currently supports YouTube only. Spotify Web, SoundCloud, and other platforms are planned for future versions.