Capo – Pitch Speed Volume

Capo lets you change the pitch, speed, and volume of any audio or video playing in your browser — on any website.

Perfect for musicians, language learners, transcribers, karaoke practice, podcasts, lectures, and everyday listening.

Features

• Pitch shift from -12 to +12 semitones
• Fine-tune pitch with ±50 cent precision
• Independent speed control from 0.25× to 3×
• Volume boost up to 300%
• Per-site settings automatically saved and restored
• Adjustable rewind / fast-forward intervals (5s, 10s, 15s, 30s)
• Light, dark, and system themes
• Minimal, keyboard-friendly interface
• Works on YouTube, Spotify Web, SoundCloud, Bandcamp, podcasts, and any site using HTML5 audio/video

Great For

• Practicing songs in a different key
• Slowing down music without changing pitch
• Learning languages from native audio
• Speed-listening to podcasts and interviews
• Transcribing audio comfortably
• Matching songs to your vocal range
• Boosting quiet audio beyond normal limits

Privacy First

Capo processes audio locally in your browser using the Web Audio API and a SoundTouch worklet.

No accounts. No uploads. No servers.
Your audio never leaves your device.