Capo – Pitch, Speed & Volume Changer

Tracking since Apr 17, 2026.

Changelog

• Jun 5, 2026
  description

  Capo sits in your toolbar and re-tunes the audio of anything that plays in your browser. Open it on YouTube, Spotify Web, SoundCloud, Bandcamp, or anywhere else music or video plays, and three controls appear:
  
  • Pitch — transpose ±12 semitones, with ±50 cents of fine-tune for the in-between notes. Tempo stays the same.  
  • Speed — 0.25× to 3× playback. Pitch stays the same.  
  • Volume — up to 300%, so you can lift quiet sources above your system's ceiling.
  
  The popup also gives you transport controls — play/pause, skip back/forward, restart, and a scrubbable timeline — so you don't need to leave it to step through a track.
  
  Settings stick per page. Tune a song once and Capo will re-apply the same pitch, speed, and volume the next time you open it.
  
  Local by default. Your settings are stored on your device. Capo does not collect listening history, URLs, or audio. Anonymous product diagnostics are opt-in and can be turned off at any time.

  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.

• Jun 5, 2026
  short_description

  Transpose pitch & cents · playback speed · volume — for any webpage audio or video

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

• Jun 5, 2026
  name

  Capo ▲▼ pitch ▹ speed ▲▼ volume

  Capo – Pitch, Speed & Volume Changer

• May 30, 2026
  description

  Capo sits in your toolbar and re-tunes the audio of anything that plays in your browser. Open it on YouTube, Spotify Web, SoundCloud, Bandcamp, or anywhere else music or video plays, and three controls appear:
  
  • Pitch — transpose ±12 semitones, with ±50 cents of fine-tune for the in-between notes. Tempo stays the same.  
  • Speed — 0.25× to 3× playback. Pitch stays the same.  
  • Volume — up to 300%, so you can lift quiet sources above your system's ceiling.
  
  The popup also gives you transport controls — play/pause, skip back/forward, restart, and a scrubbable timeline — so you don't need to leave it to step through a track.
  
  Settings stick per page. Tune a song once and Capo will re-apply the same pitch, speed, and volume the next time you open it.
  
  Local by default. Your settings are stored on your device. Capo does not collect listening history, URLs, or audio. Anonymous product diagnostics are opt-in and can be turned off at any time.
  
  Available in 11 languages: English, Spanish, Portuguese (Brazil), French, German, Japanese, Simplified Chinese, Korean, Russian, Hindi, and Arabic.

  Capo sits in your toolbar and re-tunes the audio of anything that plays in your browser. Open it on YouTube, Spotify Web, SoundCloud, Bandcamp, or anywhere else music or video plays, and three controls appear:
  
  • Pitch — transpose ±12 semitones, with ±50 cents of fine-tune for the in-between notes. Tempo stays the same.  
  • Speed — 0.25× to 3× playback. Pitch stays the same.  
  • Volume — up to 300%, so you can lift quiet sources above your system's ceiling.
  
  The popup also gives you transport controls — play/pause, skip back/forward, restart, and a scrubbable timeline — so you don't need to leave it to step through a track.
  
  Settings stick per page. Tune a song once and Capo will re-apply the same pitch, speed, and volume the next time you open it.
  
  Local by default. Your settings are stored on your device. Capo does not collect listening history, URLs, or audio. Anonymous product diagnostics are opt-in and can be turned off at any time.

• May 23, 2026
  description

  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.

  Capo sits in your toolbar and re-tunes the audio of anything that plays in your browser. Open it on YouTube, Spotify Web, SoundCloud, Bandcamp, or anywhere else music or video plays, and three controls appear:
  
  • Pitch — transpose ±12 semitones, with ±50 cents of fine-tune for the in-between notes. Tempo stays the same.  
  • Speed — 0.25× to 3× playback. Pitch stays the same.  
  • Volume — up to 300%, so you can lift quiet sources above your system's ceiling.
  
  The popup also gives you transport controls — play/pause, skip back/forward, restart, and a scrubbable timeline — so you don't need to leave it to step through a track.
  
  Settings stick per page. Tune a song once and Capo will re-apply the same pitch, speed, and volume the next time you open it.
  
  Local by default. Your settings are stored on your device. Capo does not collect listening history, URLs, or audio. Anonymous product diagnostics are opt-in and can be turned off at any time.
  
  Available in 11 languages: English, Spanish, Portuguese (Brazil), French, German, Japanese, Simplified Chinese, Korean, Russian, Hindi, and Arabic.

• May 17, 2026
  description

  Change Pitch lets you adjust the pitch, speed, and volume of any audio or video playing in your browser — on any website.
  
  Features:
  - Pitch shifting from -12 to +12 semitones with real-time audio processing
  - Speed control from 0.25x to 3x
  - Volume boost up to 300%
  - Per-site settings that are automatically saved and restored
  - Quick-access preset buttons for common values
  - Clean, minimal interface with light and dark themes
  - Works with YouTube, Spotify, SoundCloud, podcasts, and any other site with audio or video
  
  Use cases:
  - Practice music at a different key or tempo
  - Slow down lectures or speed up podcasts
  - Boost quiet audio beyond the normal volume limit
  - Transcribe audio at a comfortable speed and pitch
  - Learn songs by transposing them to your vocal range
  
  Change Pitch processes audio locally in your browser using the Web Audio API. No data is sent to any server.

  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.

• May 17, 2026
  short_description

  Change the pitch, speed, and volume of any audio or video on any webpage

  Transpose pitch & cents · playback speed · volume — for any webpage audio or video

• May 17, 2026
  name

  Change Pitch

  Capo ▲▼ pitch ▹ speed ▲▼ volume

• May 17, 2026
  permissions

  activeTab, storage, declarativeNetRequest, scripting

  activeTab, storage, declarativeNetRequest

• Apr 22, 2026
  permissions

  activeTab, storage, declarativeNetRequest

  activeTab, storage, declarativeNetRequest, scripting

Permissions & access

Permissions

activeTabstoragedeclarativeNetRequest

Host access

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Screenshots