Guitar Tuner Ultra
A modern, free online guitar tuner built for musicians of all levels.
Our Mission
We believe that quality tools should be accessible to all musicians, regardless of their budget. Guitar Tuner Ultra was created to provide a modern, accurate, and completely free tuning solution for acoustic guitars, electric guitars, ukuleles, and mandolins.
Whether you're a beginner learning your first chords or a professional touring musician, our tuner works anywhere you have a web browser and a microphone.
For Every Musician
Fast, accurate, and completely free. No accounts, no ads, no in-app purchases.
Built with Modern Technology
Web Audio API
Uses the Web Audio API with autocorrelation-based pitch detection for ±5-10 cent accuracy.
Astro Framework
Built with Astro for fast loading, minimal JavaScript, and excellent performance across all devices.
Tailwind Design
Modern design system inspired by Vercel with clean typography, smooth interactions, and dark mode ready.
Why Musicians Choose Guitar Tuner Ultra
Completely Free
No hidden costs, no premium version. Full access to all features forever.
No Installation Required
Open in any browser. Works on desktop, tablet, and mobile devices.
Accurate Pitch Detection
Web Audio API based detection accurate to ±5-10 cents for professional tuning.
Multiple Instruments
Tune guitars, ukuleles, mandolins, and more with instrument-specific presets.
Custom Tunings
Create and save custom tuning configurations for any instrument.
Educational Resources
Access tuning guides, chord library, and FAQ for learning music theory.
Privacy & Data
Your privacy is important to us. Guitar Tuner Ultra processes all audio analysis locally on your device. We don't record, store, or transmit audio data.
- •All pitch detection happens in your browser, not on our servers.
- •No audio is recorded or stored when you use the tuner.
- •Microphone access is requested by your browser for security.
- •Custom tunings are stored locally in your browser.
Get in Touch
Have feedback, a feature request, or a question? We'd love to hear from you. Email us at contact@aiguitartuneronline.com or head to our contact page.
Contact Us