Free online tuner
Online tuner.
Tune guitar, bass, ukulele, violin and more by mic or by ear. Any tuning, any A.
Tuner · Any tuning
Tune your guitar.
Pluck a string and the meter shows how far off it is. Tap any string to hear it at its true pitch and tune by ear.
- Pick any instrument and tuning
- Shift it down or up by half steps
- Set A to anything: 440, 432, 442…
E A D G B E
The sound never leaves your device.
Ready
Strings 1 → 6
3 times each
Tap Start, then pluck any string.
Strings · tap to hear
Instrument
Try uke, bari, 5 string, cello…
Tuning
E Standard
Popular tunings
Shape
Shift
Standard pitch
Higher or lower
Fine-tune
Moves every string a little, for example to match a recording.
Custom tuning
Any strings, any notes
One row for each string. The top row is the top string, usually the thickest.
Start from
Strings
+ adds a lower string at the top. − takes the top string away.
Notes from C0 to C8. Type a note like D2, F♯3 or B♭1, or use − and +.
Save and use keeps it on this device (up to 8 tunings). Use without saving tunes with it for now.
Reference A
Slider 380–500 Hz. Type any value from 300 to 600 Hz.
More pitches
Sound
Violin, viola, cello and double bass start with Bowed, the rest with Acoustic.
Note length
Match a recording Beta
Find the A a song was recorded at, then tune to it and play along.
…listening
Play the song, loud and clear.
Result
This recording sits on A 440
The tuner already matches it: nothing to change.
A recording is only known within a half step: if the song is a half step down, also change the tuning.
Beta: tested on real records and synthetic songs. Check the result by ear.
Nothing is uploaded: the sound is measured on this device.
Settings
Light theme
Easier to read in bright light.
Mode
Guided: one string at a time, from the thickest.
Meter
Ruler: a pointer on a scale from −50 to +50 ¢. Left is low, right is high.
Note length
How long a tapped string and Hear sound. Repeat plays the string again every few seconds, Continuous holds it: tap it again to stop.
Reference sound
Violin, viola, cello and double bass start with Bowed, the rest with Acoustic. A sound you pick stays.
Volume
Phone speakers play very low notes an octave up.
Note names
Sharps and flats
Octave numbers (E2, E4)
Tells the two E strings apart: E2 is the low one, E4 the high one.
Frequencies (Hz)
Each string's pitch in hertz, such as 82.4 Hz.
In tune within
Precise is not used with harmonics: Normal ±3 applies.
Harmonic mode
For one low string: play its 12th-fret harmonic (×2) or its 5th-fret one (×4).
Pro view
The pitch heard in Hz, tenths of a cent and the input picker. Turns on octave numbers and frequencies.
Device names appear after you allow the microphone.
Input channel
Auto picks the channel with sound. Interfaces: choose the input your instrument is plugged into.
The sound never leaves your device. No account, no cookies.
Keys: Space start or stop · ← → half step · ↑ ↓ A (Shift: bigger steps) · 1–9 string · M mode · R hear · − + volume · L copy link · Esc done
Popular tunings
One tap loads it into the tuner, notes and all. Hear each string before you turn a peg.
All instruments- E StandardIn the tunerThe usual tuning
- E♭ StandardIn the tunerAll strings 1 half step lower
- D StandardIn the tunerAll strings 2 half steps lower
- C StandardIn the tunerAll strings 4 half steps lower
- Drop DIn the tunerLow string down to D
- Drop C♯In the tunerDrop D, 1 half step lower
- Drop CIn the tunerDrop D, 2 half steps lower
- Drop BIn the tunerDrop D, 3 half steps lower
- DADGADIn the tunerRinging folk and Celtic sound
- Double Drop DIn the tunerBoth E strings down to D
- Open GIn the tunerOpen strings ring a G chord
- Open DIn the tunerOpen strings ring a D chord
- Open EIn the tunerOpen strings ring an E chord
- Bass · E StandardIn the tunerThe usual bass tuning
- Ukulele · gCEAIn the tunerThe usual ukulele tuning
String tension
Tune down, keep the feel.
Every half step down takes about 11% of the pull off your strings. The calculator shows it string by string, and the set that brings it back.
E Standard on 10–46: standard tension · your usual set is fine
- Every string, in lb and kgSee which string goes slack first, not just an average.
- Your gauges, your scaleSets from 9–42 to 13–62 and 32–130 bass, or your own gauges, on any scale length.
- Drop, standard and openEvery tuning in the tuner, at the A you picked.
Play along with the original
Your favourite songs, with the record
You want to play a song you love along with the original recording, but your guitar sounds off against it, even right after tuning? Usually two things are different. The tuning: many songs are a half step down (E♭ Standard), a whole step down, in Drop D or in an open tuning. And the pitch of the record itself: tape machines ran a little fast or slow, so a record can sit between two notes. Kill 'Em All runs about 16 cents sharp; Pantera's Vulgar Display of Power about 57 cents flat.
TuneLit measured 5,100+ songs from original CDs and LPs. Find your band, tap Tune next to the song, and the tuner sets the exact tuning and the record's pitch for you. Then just turn the pegs and play along.
- 5,400+ songs by 41 bands: Metallica, Nirvana, AC/DC, Led Zeppelin, Pink Floyd and 36 more
- How to get there string by string, and which strings need to be heavier
- Your own song file? Play along moves it into your tuning and slows it down
Find your band → Cents, half steps and A 440, simply explained →
Free online tuner
One tuner for every tuning
Pick an instrument, pick a tuning, then shift it down or up by half steps. Set A4 anywhere from 300 to 600 Hz, or add fine cents to match a piano or a recording. Every target shows its note, its octave and its frequency, and the reading itself is measured, not guessed: how the tuner listens shows its error note by note.
- Any tuning × any half-step shift × fine cents × any A4
- Note names with octave, in C D E, Do Re Mi or German H
- Reference tones, so you can tune by ear without a mic
- Works offline once loaded; add it to your home screen
- No ads, no account, no cookies
- Sound stays on your device: nothing is recorded or sent
Four steps
How to use it
- Tap Start tuner and allow the microphone. Your browser asks once.
- Pluck one string and let it ring. The tuner finds the nearest string by itself, or tap a string to lock it.
- Turn the peg slowly. The meter leans toward Low or High, in words as well as by position, and shows ✓ in tune when the note is right.
- Move on to the next string, then play each string once more as a quick check.
23 tuners
Instruments
Every instrument has its own tuner page with its notes, its frequencies and its other tunings. Each of them is also in the list of all tunings.
Guitars
Basses
Ukuleles
Bowed strings
Folk & world
Any instrument
Measured
How the tuner hears a guitar
Every figure here comes from the tuner's own code, run on test signals each time the site is built: a clean string tone, a plucked string, and the same tone through a model of a phone microphone, a high-pass filter that turns deep notes down. For a guitar in standard tuning, E2 to E4, readings through the phone-mic model stayed within about 1 ¢, and on clean tones within 0.2 ¢. The tuner calls a string in tune at ±3 ¢, so that leaves room to spare.
The deepest bass notes are the hardest: in the model the fundamentals of A0 and B0 arrive 20 to 22 dB quieter, and the tuner still reads them within 2 ¢ from their overtones. The low E of a guitar, E2, loses only about 5 dB.
How close it gets
- ≤ 0.2 ¢largest error on a clean tone, anywhere from A0 to E5
- ≤ 1 ¢through a phone-mic model, E2 and up
- ≤ 2 ¢through a phone-mic model at A0 (27.50 Hz) and B0 (30.87 Hz), the deepest bass notes
Questions
Is TuneLit free?
Yes, it is free. There are no ads, no account and no paywall on tunings or A4. Everything on this page works without signing up.
Does it record or upload my sound?
No. The microphone signal is analyzed on your device, in real time, and never leaves it. While the tuner listens, the page makes no network requests.
Does it work offline?
Yes. After the first visit the site keeps its files on your device, so the tuner and tone generator work without a connection. Add it to your home screen to open it like an app.