Jam JamFree online tuner
A precise chromatic tuner for guitar, ukulele, bass and violin — right in your browser.
The Jam Jam online tuner listens to your instrument through your microphone and tells you, in real time, which note you are playing and whether you are sharp or flat. Nine instruments come with their own presets — guitar, bass, ukulele, guitalele, mandolin, banjo, violin, viola and cello, 20 tunings in all — and a chromatic mode, accurate to ±5 cents, covers everything else. No download, no account, no ads: open the page and tune. The tuner is one screen of Jam Jam, the app that finds your songs’ chords, keeps them in a notebook and plays them back.
How to tune your guitar online
Allow the microphone
Open the tuner and grant microphone access — audio stays on your device, nothing is uploaded.
Play one string
Pluck a single open string. The tuner detects the pitch and shows the target note (E A D G B E for standard guitar).
Match the needle
Turn the peg until the needle is centred and turns green — you are perfectly in tune.
Repeat for each string
Work through every string. The chromatic mode also handles drop D, DADGAD, half-step down and any alternate tuning.
Not your average online tuner
9 instruments, not just guitar
Guitar, bass, ukulele, guitalele, mandolin, banjo, violin, viola and cello — each with its own tunings, 20 in total.
Alternate tunings built in
Drop D, DADGAD, Open G, Open D, Drop C, half-step down, ukulele low-G and baritone, and more.
Auto string detection + lock
It finds the nearest string on its own, or tap to lock one — and each string plays a reference note in its real instrument voice.
Precise and private
A smooth needle accurate to ±5 cents, with the audio analysed in your browser and never uploaded.
Why this tuner
- Pitch detection accurate to ±5 cents, updated in real time
- 9 instruments and 20 tunings — plus a chromatic mode for anything else
- 100% free, in your browser, no sign-up and no ads
- Private: the audio never leaves your device
Nothing you play is uploaded: the pitch is worked out inside your browser, and on your phone chords, rhythm and lyrics are computed on the device itself. The tuner is simply one tab of Jam Jam, next to the chord notebook, chord detection and the keyboard — in the browser, and offline in the Android app.
More Jam Jam tools
Find and read chords
Play a chord and Jam Jam names it, lists the notes it hears and draws it on your instrument.
Online piano keyboard
A free virtual piano you can play in your browser — with chords, scales and 142 instrument sounds.
Your online chord songbook
Import a song, transpose it, pick your fingering — and let the lyrics scroll on their own while you sing.
Guides & tips
Short, no-nonsense guides to play, tune and find chords faster — each one backed by a Jam Jam tool you can open right away.
Tuner FAQ
Is this online tuner really free?
Yes — completely free, with no sign-up and no ads. It runs entirely in your browser.
Which instruments can I tune?
Nine instruments have their own presets — guitar, bass, ukulele, guitalele, mandolin, banjo, violin, viola and cello — for 20 tunings in total, drop D, DADGAD, open G and half-step down included. Anything else goes through chromatic mode, which names every note you play.
Do I need to install anything?
No. Open the page, allow the microphone and tune. There is also a Jam Jam app for Android if you prefer to tune offline.