New: Pitch Detection Engine v2.0

Master Your Music with Precision

Advanced audio tools for modern musicians.
Tuners, scales, and charts reimagined for the web.

Essential Tools

High-precision utilities designed for performance.

11+

Free Tools

3

Instruments

100%

Free Forever

0

Downloads Required

How It Works

Start practicing in seconds. No signup, no downloads, no hassle.

1

Choose a Tool

Pick from our tuner, chord library, scale visualizer, or any of our 11+ free tools.

2

Grant Permissions

For the tuner, allow microphone access when prompted. Other tools work instantly.

3

Start Practicing

Tune your instrument, learn new chords, explore scales. It's that simple.

Why Use ChordTools?

In a world of subscription apps and paywalled content, we're building the most powerful free alternative.

01. Precision First

Our tuner uses advanced DSP algorithms accurate to within 1 cent, ensuring you're perfectly in tune every time.

02. Theory Made Visual

Don't just memorize shapes. Our visualizers show you how scales and chords connect on the fretboard.

03. Any Device

Works on phones, tablets, laptops, and desktops. No app store downloads required.

Frequently Asked Questions

Is ChordTools really free?

Yes, completely free. We use non-intrusive ads to keep the servers running. No premium tiers or hidden fees.

How accurate is the tuner?

Our tuner uses Web Audio API for real-time pitch detection, accurate to within 1 cent - professional-grade precision.

Do I need to install anything?

No downloads required. Everything runs in your web browser on any device with Chrome, Firefox, Safari, or Edge.

Does it work on mobile?

Yes! All tools are fully responsive and work on smartphones and tablets. The tuner uses your phone's microphone.

What instruments are supported?

We have dedicated tools for guitar, piano/keyboard, and ukulele. The chromatic tuner works for any instrument.

Can I use this for bass guitar?

Absolutely! Our chromatic tuner detects frequencies as low as E1 (41Hz), covering 4-string and 5-string bass.

Why isn't the tuner detecting my guitar?

Make sure you've allowed microphone access in your browser. Play closer to your device and minimize background noise.

Is there a German version?

Yes! We offer all tools in German at /de - Gitarre stimmen, Akkorde, Tonleitern und mehr.