Jam JamFree · works in your browser · no sign-up
Free online tuner
A precise chromatic tuner for guitar, ukulele, bass and violin: right in your browser.
- No account
- No ads on the web
- Nothing to install
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. Twenty instruments come with their own presets, from guitar and ukulele to oud and charango, for 79 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
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Allow the microphone
Open the tuner and grant microphone access: audio stays on your device, nothing is uploaded.
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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).
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Match the needle
Turn the peg until the needle is centred and turns green: you are perfectly in tune.
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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
21 instruments, not just guitar
Guitar, bass, ukulele, guitalele, mandolin, banjo, violin, viola, cello, oud, bouzouki, balalaika, charango, cavaquinho, shamisen, double bass, lap steel and sitar: 18 of them also share their real tuning with the tab reader.
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
- 21 instruments and 79 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.
Open the tuner →More Jam Jam tools
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?
Twenty-one instruments have their own presets, from guitar to oud by way of charango and double bass, for 79 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.
Does it work on my phone or tablet, not just a computer?
Yes: the online tuner runs in any modern mobile browser exactly like on a computer, microphone and all. For daily use offline, the free Jam Jam Android app tunes the same way without needing a connection.
What is the difference between the instrument presets and chromatic mode?
An instrument preset (guitar, bass, ukulele...) shows only the strings that instrument actually has, in the order you would tune them, which is faster for standard tuning. Chromatic mode names any note at all, which is what you want for an odd instrument, a non-standard tuning, or just checking a single note.