Setup order after a string change, then open the free browser tuner.
How to set guitar intonation after a string change starts with fresh strings, then relief, action, and a 12th-fret check — with a clear stop before you force the truss rod. GuitarTuner.io gives you open-string and fretted pitch in the browser while you work.
Tap a step to highlight what to do. Keep pitch checks on GuitarTuner.io. If the rod sticks or the neck fights you, stop and see a tech.
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. 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.
Short paths into the tools and guides you already use after a string change or before practice.
Open-string centering, then fretted and harmonic reads while you move a saddle one small step at a time.
Open the tuner →Action & setupRetune after every height change so you hear the real guitar, not leftover stretch from the last pass.
Check pitch →ElectricIndividual saddles, floating bridges that need to settle, and electric-focused target notes when you need them.
Electric guitar tuner →AcousticConfirm open pitch and spot-check fretted notes. Heavy saddle compensation stays a tech job — keep the tuner honest while you decide.
Acoustic guitar tuner →Practice toolsSixty-nine tuning pages, custom builder, metronome, chord library, and a practice-plan finder — free in the browser.
Browse tunings →No paid upgrade required to tune. Labeled partner messages keep the product ad-light.
Microphone tuner with client-side audio. Works for acoustic, electric, bass, and listed tunings.
No sign-in wall, no app-store download. Install the PWA later if you want offline access.
After. Fresh strings first, stretch until pitch settles, then relief, action, and the 12th-fret check. Mixed-age strings make the tuner 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 on GuitarTuner.io. 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.
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.
Yes. Free in the browser, no account, no paid upgrade required to tune. Audio is processed on-device for tuning feedback.
Keep the order short: strings, relief, action, 12th-fret check. Use GuitarTuner.io for open-string and fretted pitch while you work — then play.
Open the tuner