Capo – Pitch, Speed & Volume Changer
Extension Actions
- ★Featured
- In-App Purchases
Change the pitch, key, and speed of any audio or video — on YouTube, Spotify, SoundCloud & more. Transpose, slow down, and loop.
Capo is a pitch changer, speed controller, and volume booster for any audio or video on any website — YouTube, Spotify Web, SoundCloud, Bandcamp, podcasts, audiobooks, lectures, and more.
Change the key of a song, slow down music without changing pitch, boost quiet videos, loop the hard part, and practice with studio-style tools — right in your browser, on the page you're already watching.
FREE FOREVER
🎵 Pitch Changer — transpose any song up or down 12 semitones and fine-tune by cents, with clear, natural-sounding audio.
🐢 Speed Changer — slow down or speed up playback from 0.25× to 3× without changing the pitch, or flip on Varispeed for classic tape-style slowdown.
🔊 Volume Booster — push volume up to 300%, well past the browser's limit, or pull it down when a site is too loud.
🔁 A/B Loop — repeat any section hands-free for practice, transcription, or review.
💾 Per-Site Settings — Capo remembers your setup for every website automatically.
⌨️ Keyboard Shortcuts — control pitch, speed, volume, and looping without opening the popup.
CAPO PRO — A PRACTICE STUDIO IN YOUR SIDE PANEL
Upgrade to unlock the Capo Workspace, a full control surface that stays beside your tab:
🎙️ Vocal Reducer — turn down the lead vocal on any track for karaoke, backing tracks, or sing-along practice.
🗣️ Preserve Voice — keep vocals natural at any pitch with formant preservation.
📈 Speed Trainer — start slow and ramp up the tempo automatically, loop by loop, until you're at full speed.
🎚️ Studio Equalizer — shape the sound with a six-band EQ and real-time spectrum display.
✨ Reverb — add space and ambience, from a touch of room to slowed-and-reverb vibes.
📌 Clips & Markers — save sections of a track with their own pitch, speed, and loop settings, drop markers on the timeline, and keep notes per track.
Every subscription starts with a 7-day free trial — or pay once for lifetime access.
GREAT FOR
🎸 Musicians — transpose songs to your key, slow down solos, loop tricky passages, and build speed with the trainer.
🎤 Singers & karaoke — change the key to fit your voice and reduce vocals to sing over the original track.
🌎 Language learners — slow down speech, repeat phrases, and train your ear at your own pace.
📚 Podcasts, audiobooks & lectures — speed up listening and replay what you missed.
🎧 Everyday listening — boost quiet videos, EQ bad mixes, and make slowed + reverb or nightcore-style versions of any song in real time.
WHY CAPO
• High-quality audio engine — pitch shifts and slow-downs stay clear, not garbled or robotic.
• Works on virtually any site with audio or video — no downloads, no re-encoding, no waiting.
• Fast, clean popup plus a full Pro workspace when you want more.
• Available in 52 languages.
PRIVACY
Capo runs locally in your browser. No audio ever leaves your device, and the free version needs no account. 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.
Latest reviews
- Frank
- I’ve really enjoyed using Capo! As someone who loves music, I find this extension both fun and genuinely useful. My favorite features are the Pitch and Speed controls, which make it easy to tune songs and adjust their playback speed for a better listening or practice experience. I also really like the Theme options, the helpful Support section, and especially the Changelog, where I can see previous updates, new features, and improvements. The UI is clean, modern, and easy to navigate, which makes everything feel smooth and enjoyable to use. Overall, an amazing extension for anyone who loves music.
- Muhammad Shahmeer
- Really useful extension for anyone who listens to or practices music regularly. The controls are simple to use, and being able to slow down tracks, repeat sections, and adjust the pitch makes learning songs much easier. It’s lightweight, reliable, and has quickly become something I will use whenever I’m practicing.
- Sanela Ilic
- Simple extension, does exactly what I needed. I mainly use YouTube to practice singing and being able to lower a song by a couple semitones without downloading anything is incredibly convenient. Installed it expecting to use it occasionally, but I end up using it several times a week.
- Frank Yin
- Been using Capo lately for vocal practice and it’s actually pretty handy. A lot of songs I like sit just a little too high for my range, so being able to drop them 2-3 semitones directly on YouTube saves me a ton of time. I used to mess around with downloaded audio files and other software, but now I just adjust the key and keep practicing. Simple idea, but I’ve ended up using it almost every day.
- William Hall
- I’ve been using this mostly for slowing down songs for practice and changing pitch a bit. It’s simple. ☝️Open it and it just works. Works right on YouTube without any setup. Volume control is actually more useful than I thought. Some videos are just too quiet and this fixes it quickly.🔧 Pitch shifting is okay, and speed control feels smooth enough. Great!!!👋
- BlinkingStar
- I wanted YouTube to have a pitch changer & loop playback feature. Today, I've heard about the Capo extension and realized this is what I've been looking for. Great extension! As an extension user, I want to have these features: - change extension theme color: now only green theme is available. - pin the extension at the top of browser: now it's disappeared when clicked outside.
- Hansen Harry
- 😍😍😍I'm a music lover, and this extension is amazing. It makes listening to and practicing music so much more enjoyable. Excellent pitch changer and speed controller for YouTube, Spotify, SoundCloud, podcasts, and online courses. I use Capo every day to change song keys, slow down music for practice, and loop difficult sections. The audio quality remains clear even when changing pitch or playback speed, which is something many similar extensions struggle with. The volume booster is also very useful for quiet videos and lectures. Per-site settings save a lot of time because my preferred settings are automatically remembered. If you're looking for a browser extension for pitch shifting, audio speed control, music practice, transcription, language learning, or podcast listening, Capo is definitely worth installing.
- Bobby Piao
- The extension has become part of my daily workflow, and the developers continue to improve it with new features and fixes. Highly recommended for anyone.
- Averos Howard
- How is this extension not more popular? I was searching for a YouTube pitch changer and playback speed controller, and Capo turned out to be much more than that. It lets me transpose songs, slow down guitar solos, repeat sections with A-B loop, boost volume, and control everything with global hotkeys. I also use it for language learning and podcasts. Unlike many audio speed changer extensions, the sound stays clean even at slower speeds. This has quietly become one of the most useful Chrome extensions in my browser. If you're looking for a YouTube pitch changer, speed controller, volume booster, or an A-B loop extension, this is absolutely worth trying.
- Daniel Wang
- Simple, useful, and works exactly as expected. I mainly use it to change playback speed and repeat sections with A-B loop. The global hotkeys are a huge time saver since I can control playback from anywhere. It’s become one of the few extensions I use every day. Highly recommended!
- Jin Sheng
- This extension completely changed how I practice languages and learn songs. The combination of speed control, pitch adjustment, A-B looping, and customizable global hotkeys gives me much more control than any built-in media player I’ve used. The global hotkeys are my favorite feature. I can pause, rewind, adjust speed, or repeat a section without leaving the application I’m working in. It makes studying and practicing feel much more natural and efficient. The audio quality remains excellent even when changing speed or pitch, and the interface stays out of the way when I don’t need it. If you spend a lot of time learning from videos, practicing music, transcribing audio, or improving pronunciation, this extension is absolutely worth trying.
- Tiny Smith
- Absolute gem of an extension. Lightweight, fast, and the pitch changes sound natural.
- Tyler Horvath
- ngl this deserves way more downloads 🚀
- Corey Miles
- Finally an audio extension that actually works everywhere. Excellent job!!! 💯💯💯
- William Hall
- Tried a couple of similar extensions before, and most of them either broke audio or felt clunky. This one's pretty lightweight, and the controls are straightforward. 👍👍👍
- Yevhenii Tkachenko
- As someone who practices music regularly, this is incredibly useful. I can finally match songs to my vocal range without distortion. The pitch control is surprisingly accurate and doesn’t introduce weird artifacts.
- Jason Stroud
- I’ve tried a few pitch control tools before and they all had issues with distortion or limited controls. This one just works. Smooth, reliable, and does exactly what it promises