Eight browser tools, one practical setup order, and plain-language guides for the guitar you already own.
Every tool works from the notes, frets, gauges and taps you enter. The reference-tone generator plays pitches through your speakers; nothing on this site listens through your microphone.
Each tool has a clear input and a result you can act on. The calculations run in your browser, with no account required.
Enter the note your tuner shows for each string, plus an optional cents reading. The tool compares them with guitar, bass, ukulele, mandolin and banjo tunings and returns the closest match, its exact target note on every string, and how far each string is from that target.
Example: D A D G A D from the lowest string comes back as DADGAD at zero difference.
Open the tuning identifier →Convert pitchType a note with its octave to get the frequency in hertz, or type a frequency to get the nearest note and its cents offset. Set A4 to 440, 432, 415 Hz or a custom reference; the page also lists every open string in a chosen tuning.
Example: A4 at 440 Hz returns 440.00 Hz, and 82.41 Hz returns E2 — the open low E of standard tuning.
Open the converter →Tune by earChoose an instrument and tuning, then play a sustained pitch for each open string. Octave shift, waveform, tone length and A4 reference are adjustable, and sequence mode plays the strings one at a time. The tone is synthesised in the browser; no microphone is used.
Example: standard guitar plays E2, A2, D3, G3, B3, E4 in order while you match each string by ear.
Open the tone generator →Plan a string setPick a scale length, tuning, material and gauge for every string. The calculator estimates each string's tension and the total for the set, and flags when an estimate falls outside the tool's reference band for that instrument. These are estimates from the tool's model and the inputs you provide — not measured tension, and not universal safe limits. A second setup can be compared side by side.
Example: enter a 10–46 set on a 25.5 in scale in standard tuning as the baseline, then change one gauge or the tuning and compare the new estimate with the original.
Open the tension calculator →Name a shapeClick the frets you are holding or type a fret number per string, including x for a muted string. The namer reads the shape in the selected tuning and returns the root, chord quality, intervals, bass note and the other names for the same notes.
Example: x32010 returns C major with C in the bass — the notes are C, E and G.
Open the chord namer →Move the shapesEnter a song key and a capo fret to see the chord shapes to play, or name the shapes you already know and get the capo fret that puts them in the song's key. Qualities and slash basses shift with the root, and impractical frets are reported instead of hidden.
Example: a song in Bb played with G shapes needs capo 3 — Bb becomes G, Gm becomes Em, Eb becomes C and F becomes D.
Open the capo transposer →Map the neckChoose an instrument, tuning, key and scale. Every matching note is drawn on the fretboard with note names, interval numbers or both. Guitar, 7-string, 12-string, bass, ukulele, mandolin and banjo presets are included.
Example: G major in standard tuning marks every G, A, B, C, D, E and F# on the neck; switch the labels to intervals to see the 1–7 degrees.
Open the fretboard finder →Set a practice tempoTap a key or pad to measure BPM, then read delay times in milliseconds for each note value, a reverb pre-delay starting point, bar lengths across time signatures and a practice ladder. Taps are timed on your device and nothing is uploaded.
Example: a steady 120 BPM tap gives a 500 ms quarter note, a 250 ms eighth and a 375 ms dotted eighth.
Open the tap tempo calculator →Work in this order, and use a measured pitch check at each stage. A physical tuner or the reference-tone generator on this site supplies the target; this page does not listen to your instrument.
Install a full matched set in the gauge you play. Stretch gently, retune until drift settles, then warm up and retune once more before you touch hardware.
Check neck bow in playing position. Small relief changes affect fretted pitch and buzz. If the truss rod nut will not move smoothly, stop — do not force it.
Set string height so you fret cleanly without chronic buzz. Action changes fretting pressure and the angle over the saddle, so settle it before length corrections.
Tune open with a physical tuner or the site's reference tones. Compare the 12th-fret harmonic to the fretted 12th with normal pressure. If sharp, lengthen at the saddle; if flat, shorten. Retune open after every move.
No physical tuner to hand? The reference-tone generator lets you tune by ear. As a separate option, the third-party browser tuner GuitarTuner.io can give a measured reading.
Reference pages and checklists from this site, grouped by the job in front of you.
Start with what the open strings should read, then work through the symptom you actually have.
Sounding notes and playable shapes for the tunings this site covers in depth.
Change the shapes instead of the tuning, and read the latest setup notes.
After. Fresh strings first, stretch until pitch settles, then relief, action, and the 12th-fret check. Mixed-age strings make any pitch reading look wrong when string condition is the real issue.
Fresh strings → neck relief → action → saddle intonation. Length corrections only stay true when bow and height are already stable.
Tune the open string with a physical tuner or the reference-tone generator on this site. Compare the 12th-fret harmonic to the fretted 12th with normal pressure. Sharp means lengthen at the saddle; flat means shorten. Retune open after every move.
No. Guitar Tuner Lab does not have a microphone tuner. The reference-tone generator plays a target pitch for each string so you can tune by ear; a physical tuner or a separate tuner app gives you a measured reading.
When the truss rod will not turn smoothly, fretted notes stay badly off after careful string work, or you see structural issues. Do not invent turn counts or force a stuck rod.
If you know what your tuner says on each string, the tuning identifier names the tuning and shows the target for every string. If you are setting up after a string change, follow the four-step order first.
Open the tuning identifier