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Free Online Instrument Tuner

Tune your guitar, ukulele, bass, or violin with precision using our free online chromatic tuner. Real-time pitch detection with visual feedback helps you get perfectly in tune every time.

6E2

5A2

4D3

3G3

2B3

1E4

0/6 strings tuned

---

Target: ---

0 cents

Almost There

Click to start pitch detection

How to Use the Tuner

Get your instrument perfectly in tune in just a few simple steps

01
Select Your Instrument
Choose your instrument type from the dropdown menu - guitar, ukulele, bass, violin, or chromatic mode for any instrument.
Standard tunings: Guitar (EADGBE), Ukulele (GCEA), Bass (EADG), Violin (GDAE)
02
Start Microphone Detection
Click the microphone button to enable real-time pitch detection. Play a string and watch the tuning meter respond instantly.
For best results, tune in a quiet environment and play one string at a time
03
Tune Each String
Adjust your string until the needle centers in the green zone. A checkmark appears when the string is in tune, and you'll hear a pleasant chime.
Tune from low to high strings. The meter shows green (in tune), yellow (close), or red (far off)

Features

Everything you need to tune your instrument perfectly

01
Multi-Instrument Support
Supports guitar, ukulele, bass, violin, and chromatic mode for any instrument. Switch between instruments with one click.
02
Real-Time Pitch Detection
Advanced YIN algorithm provides accurate pitch detection within ±1 cent. See your tuning status instantly as you play.
03
Visual Tuning Meter
Color-coded meter shows if you're sharp, flat, or in tune. Green means perfect, making tuning intuitive for beginners.
04
Reference Tone Playback
Play reference tones for each string to tune by ear. Great for training your musical hearing and quiet environments.
05
Progress Tracking
Track which strings you've tuned with visual checkmarks. Completion celebration when all strings are in tune.
06
Browser-Based & Free
No app download required. Works in any modern browser on desktop or mobile. Always free with no ads or limitations.

Free Audio Tools

Frequently Asked Questions

Common questions about our online instrument tuner

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Our tuner uses the YIN algorithm, which provides accuracy within ±1 cent (1/100 of a semitone). This is professional-grade accuracy suitable for studio recording and live performance. The tuner considers you 'in tune' when within ±5 cents of the target pitch.

We support guitar (6-string standard), bass (4-string standard), ukulele (soprano/concert/tenor standard GCEA), violin, and chromatic mode for any instrument. Chromatic mode detects any pitch and shows you the nearest note, perfect for alternative tunings or unusual instruments.

Make sure you've granted microphone permission in your browser. Try playing closer to your device's microphone, tune in a quiet environment, and play one string at a time with a clear, sustained tone. Low-quality microphones may struggle with bass frequencies.

Green means you're in tune (within ±5 cents). Yellow means you're close but need slight adjustment. Red means you're significantly sharp (too high) or flat (too low). The needle position shows exactly how far off you are - left is flat, right is sharp.

Yes! Our tuner works on any device with a microphone and modern web browser - smartphones, tablets, laptops, and desktops. No app download is required. For best results on mobile, hold your phone close to your instrument while tuning.

Chromatic mode detects any pitch without being locked to specific strings. Use it for alternative tunings (Drop D, DADGAD, Open G), instruments we don't have presets for, or to check the intonation of fretted notes across the neck.

Switch to the Manual tab and click any string button to play its reference tone. Listen to the pure tone and tune your string to match. This trains your ear and works in noisy environments where microphone detection may struggle.

When you successfully tune all strings on your instrument, you'll see a celebration dialog with a summary of all tuned notes. Each tuned string is marked with a green checkmark, and you'll hear a pleasant completion sound. You can then choose to tune again or close the dialog.

Who Uses Our Tuner

Our instrument tuner helps musicians of all levels achieve perfect pitch

Visual tuning meter with instant feedback shows exactly how to adjust each string
Guitar PracticeLearning MusicBeginner Friendly
Quick access to all four strings with reference tones for tuning by ear
Ukulele TuningGCEAString Instruments
YIN algorithm optimized for bass range provides reliable low-frequency detection
Bass GuitarLow FrequencyStudio Ready
±1 cent accuracy meets professional standards for orchestral performance
ViolinOrchestraClassical Music

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