Music Reference
Instrument Tuner — Tune Any Instrument
Real-time pitch detection using your microphone. Instantly identify notes, check tuning accuracy, and tune any instrument to concert pitch.
Free online tool · Works on mobile · No signup
How to Tune Your Instrument
Click 'Start Listening' and allow microphone access
Play a note on your instrument near the microphone
Watch the display — green means in tune, adjust if needed
Use Cases
What Will You Tune?
Guitar Tuning
Before: Your guitar sounds off but you left your clip-on tuner at home. Tuning apps are filled with ads and require accounts.
After: Open this tuner, grant mic access, and instantly see which string is sharp or flat. Adjust until it's green — done in seconds.
Orchestra Reference
Before: Your orchestra tunes to A4=440Hz but your electronic tuner died mid-rehearsal.
After: Switch to reference tone mode and play 440Hz. The oboe plays, the section tunes. Or use the mic tuner to verify each player in real-time.
Quick Pitch Check
Before: You need to verify if your instrument is in tune before a gig, but there's no time to set up hardware.
After: Pull out your phone, open the browser, start the tuner. Check each note in under a minute. No apps to install.
FAQ
Common Questions
Start Tuning Now
The tool is free, works in your browser, and runs on any device with a microphone.
Open Instrument TunerNo signup · No download · Works on any device