Capo – Pitch, Speed & Volume Changer

Change the pitch, key, and speed of any audio or video — on YouTube, Spotify, SoundCloud & more. Transpose, slow down, and loop.

Capo lets you change the pitch, speed, and volume of any audio or video on any website — YouTube, Spotify Web, SoundCloud, podcasts, lectures, and more. Whether you're learning a song, slowing down speech to study a language, or just making a quiet video louder, Capo gives you studio-style control right in your browser. WHAT YOU CAN DO • Pitch Changer — transpose by semitones and fine-tune by cents while preserving natural-sounding vocals. • Speed Control — slow down or speed up audio from 0.25× to 3× without changing pitch. • Volume Booster — boost volume up to 300% or reduce it when needed. • A/B Loop — repeat any section for focused practice, learning, or review. • Per-Site Settings — automatically remembers your settings for each website. GREAT FOR 🎤 Musicians & singers — transpose songs, adjust keys, slow down solos, and loop passages for practice. 🌎 Language learners — slow speech, repeat phrases, and improve listening comprehension. 📚 Podcasts, audiobooks & lectures — speed up content and replay what you missed. 🔊 Everyday listening — boost volume and customize audio the way you like. WHY CAPO • High-quality audio engine — slow-downs and pitch shifts stay clear, not garbled. • Works on virtually any site with audio or video. • Keyboard shortcuts and a clean, fast popup. • Available in 11 languages. PRIVACY Capo runs locally in your browser. No account, no audio ever leaves your device. Optional, anonymous diagnostics help us fix broken sites, and you can turn them off anytime. Take control of any audio or video — add Capo and tune the web to your ear.