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StringPalStringPal

Looper, pitch shifter, and more. For musicians.

A free Chrome extension that adds practice tools to any YouTube video.

Add to Chrome – It's Free

No account required · Works on any YouTube video

600+ users on the Chrome Web Store

See it in action

Loop sections, shift pitch, control speed – all without leaving YouTube

StringPal Chrome extension showing loop controls on a YouTube video

Get started in 30 seconds

  1. 1

    Install the extension

    Add StringPal to Chrome. It's free and takes one click.

  2. 2

    Open any YouTube video

    Go to a video you want to practice with.

  3. 3

    Click "Looper"

    Hit the Looper button next to the like button. Drop markers, loop, and practice.

A toolkit for musicians on YouTube

Marker-based A-B Looping

Drop markers, jump between sections, and loop any part of a video. The loop locks to your current section automatically.

Real-time Pitch Shifting

Transpose from −12 to +12 semitones in real-time. Fine-tune with cents. Match any song to your voice or instrument.

Independent Speed Control

Slow down from 0.25× to 2× without affecting pitch. Perfect for learning fast solos at your own pace.

Keyboard Shortcuts

Power user friendly. B for markers, L for loop, brackets to navigate. Keep your hands on your instrument.

Perfect for

Guitarists

Learning songs by ear, nailing solos, practicing tricky passages

Singers

Matching songs to your vocal range with pitch shifting

Language Learners

Slowing down native speech to catch every word

Anyone

Tired of rewinding YouTube videos 5 seconds at a time

Keyboard Shortcuts

Toggle looper panel⇧L
Toggle loop sectionL
Add/remove markerB
Jump between markers[ / ]
Adjust speed− / =
Pitch down / upP / ⇧P
Fine pitch adjust; / '
Reset speed0

Frequently Asked Questions

Help shape StringPal

I'm building this for musicians like you, and your feedback means everything. If you have a minute, a review helps other musicians find StringPal.

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or drop me a note – I read every single one

Join the Community

Got questions? Want to request features?

Join the StringPal Discord to chat with other musicians, get help, share feedback, and help shape what we build next.

Join the Discord

Ready to practice smarter?

Join other musicians who've upgraded their YouTube practice sessions.

Add to Chrome – It's Free

See you around