Online Violin Tuner
Tune your violin to G D A E with your microphone - with an adjustable A for orchestras that tune to 442. Bow or pluck one string at a time.
🔒 Microphone audio is analysed live in your browser - it's never recorded or sent anywhere.
How it works
Allow the mic
Press Start tuner and allow microphone access - it's never recorded.
Play one string
Start with the A string, bowed or plucked, and let it ring.
Adjust
Use the fine tuners for small changes, the pegs for big ones, until the needle is green.
How to tune a violin online
A violin is tuned in fifths: G D A E, from the lowest string to the highest. Most players tune the A first, then tune the others to it.
Tune the A string first
Play the A (2nd string from the right) and tune it to A4 - 440 Hz, or set A4 to 442 if your orchestra uses it.
D string
The next string down is D4.
G string
The lowest, thickest string is G3.
E string
The highest string is E5 - it's thin and very sensitive, so use its fine tuner.
Listen to the fifths
Once the needle is green on each, play two strings together - in-tune fifths sound smooth, with no wobble.
Frequently asked questions
What are the violin string notes?
G3, D4, A4, E5 - from the lowest string to the highest, each a fifth apart.
Should I tune to 440 or 442?
440 Hz is the standard. Many orchestras tune a little higher, to 442 or 443 - set the A4 box to match your group.
Can I tune a viola or cello here?
Yes - use Chromatic mode. Viola is C3 G3 D4 A4; cello is C2 G2 D3 A3.
Is it better to bow or pluck?
Bowing gives a longer, steadier note that reads more accurately; plucking works fine for quick checks.
What's A4 = 440?
The reference pitch the whole scale is built from. 440 Hz is the modern standard; some orchestras use 442, and some people prefer 432. Change it if your band or recording uses a different reference.
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