Online Guitar Tuner - Free & Accurate
Tune your guitar quickly and accurately with our free online chromatic tuner. Simply allow microphone access, play a string, and watch the real-time pitch indicator. Perfect for acoustic guitar, electric guitar, and bass.
How to Use the Guitar Tuner
- Click "Start Tuner" and allow microphone access when prompted
- Play a single string on your guitar
- Watch the needle - green zone means perfectly in tune
- Adjust your tuning peg until the needle centers and turns green
- Repeat for all six strings
Standard Guitar Tuning (E A D G B E)
From thickest to thinnest string: E2 (82.41 Hz), A2 (110 Hz), D3 (146.83 Hz), G3 (196 Hz), B3 (246.94 Hz), E4 (329.63 Hz). Our tuner displays the exact frequency and cents deviation for precise tuning.
Why Use an Online Tuner?
- Always available: No need to carry a physical tuner
- Accurate pitch detection: Real-time frequency analysis
- Free to use: No downloads or installations required
- Works on any device: Desktop, tablet, or smartphone with a microphone
Tips for Better Tuning
- Tune in a quiet environment for best results
- Pluck strings clearly and let them ring
- Tune up to pitch rather than down (better string stability)
- Check tuning after playing - strings settle over time
- New strings may need frequent retuning as they stretch
Frequently Asked Questions
What are "cents" in guitar tuning?
Cents measure how close you are to the correct pitch. 100 cents equals one semitone (half-step). When the tuner shows 0 cents, you're perfectly in tune. +10 cents means you're slightly sharp (too high), while -10 cents means you're slightly flat (too low). The green zone (±5 cents) indicates acceptable tuning that most ears can't distinguish from perfect pitch.
Why isn't the tuner detecting my guitar?
Make sure you've allowed microphone access in your browser. Try playing the string louder and closer to your device's microphone. Reduce background noise if possible. If using an acoustic guitar in a noisy environment, consider moving to a quieter space.
Can I use this tuner for bass or ukulele?
Yes! This chromatic tuner detects any pitch, so it works with bass guitar, ukulele, violin, and other stringed instruments. Just tune to your instrument's standard tuning frequencies.