{"id":389,"date":"2026-10-19T19:24:38","date_gmt":"2026-10-19T19:24:38","guid":{"rendered":"https:\/\/ucdreams.com\/tools\/guitar-tuner\/"},"modified":"2026-10-19T21:43:17","modified_gmt":"2026-10-19T21:43:17","slug":"guitar-tuner","status":"publish","type":"page","link":"https:\/\/ucdreams.com\/tools\/guitar-tuner\/","title":{"rendered":"Free Online Guitar Tuner \u2014 Precision Audio &#038; Mic Tuner"},"content":{"rendered":"<section class=\"wp-block-group tools-hero tool-hero is-layout-constrained wp-block-group-is-layout-constrained\" style=\"padding-top:70px;padding-bottom:40px\">\n<p class=\"has-text-align-center section-kicker wp-block-paragraph\">Precision Musical Instrument Tuner<\/p>\n<h1 class=\"wp-block-heading has-text-align-center hero-title\">Free Online Guitar Tuner \u2014 Precision Audio &amp; Mic Tuner<\/h1>\n<p class=\"has-text-align-center hero-descr wp-block-paragraph\">Tune your acoustic guitar, electric guitar, bass, or ukulele directly in your browser. Features real-time microphone pitch detection, dynamic tuning needle gauge, and realistic acoustic string plucks. 100% free, responsive for desktop &amp; mobile.<\/p>\n<\/section>\n<section class=\"wp-block-group tool-area is-layout-constrained wp-block-group-is-layout-constrained\" style=\"padding-top:20px;padding-bottom:60px\">\n<div class=\"ucd-guitar-tuner-app\" id=\"ucd-guitar-tuner-app\">\n<div class=\"gt-studio-card\" id=\"gt-studio-card\">\n\t\t<!-- Quick Presets Toolbar --><\/p>\n<div class=\"gt-preset-pills-bar\">\n\t\t\t<button type=\"button\" class=\"gt-preset-pill is-active\" data-tuning=\"guitar-standard\">Standard (E A D G B E)<\/button><br \/>\n\t\t\t<button type=\"button\" class=\"gt-preset-pill\" data-tuning=\"guitar-drop-d\">Drop D<\/button><br \/>\n\t\t\t<button type=\"button\" class=\"gt-preset-pill\" data-tuning=\"guitar-dadgad\">DADGAD<\/button><br \/>\n\t\t\t<button type=\"button\" class=\"gt-preset-pill\" data-tuning=\"guitar-half-step\">Half Step Down (Eb)<\/button><br \/>\n\t\t\t<button type=\"button\" class=\"gt-preset-pill\" data-tuning=\"guitar-open-d\">Open D<\/button><br \/>\n\t\t\t<button type=\"button\" class=\"gt-preset-pill\" data-tuning=\"guitar-open-g\">Open G<\/button><br \/>\n\t\t\t<button type=\"button\" class=\"gt-preset-pill\" data-tuning=\"bass-4\">Bass (4-String)<\/button><br \/>\n\t\t\t<button type=\"button\" class=\"gt-preset-pill\" data-tuning=\"ukulele-c\">Ukulele (C)<\/button><br \/>\n\t\t\t<button type=\"button\" class=\"gt-preset-pill\" data-tuning=\"custom\">Custom Tuning<\/button><br \/>\n\t\t\t<button type=\"button\" class=\"gt-preset-pill\" data-tuning=\"chromatic\">Chromatic Mode<\/button>\n\t\t<\/div>\n<p>\t\t<!-- Transposition & Drop Tuning Bar --><\/p>\n<div class=\"gt-transpose-bar\">\n<div class=\"gt-transpose-main\">\n\t\t\t\t<span class=\"gt-transpose-title\">Drop \/ Capo Transpose:<\/span><\/p>\n<div class=\"gt-transpose-stepper\">\n\t\t\t\t\t<button type=\"button\" class=\"gt-transpose-step-btn\" id=\"gt-transpose-down\" title=\"Drop down by 1 semitone (\u22121)\">\u2212<\/button><br \/>\n\t\t\t\t\t<span class=\"gt-transpose-badge\" id=\"gt-transpose-val\">Standard (0)<\/span><br \/>\n\t\t\t\t\t<button type=\"button\" class=\"gt-transpose-step-btn\" id=\"gt-transpose-up\" title=\"Tune up \/ Capo by 1 semitone (+1)\">+<\/button><br \/>\n\t\t\t\t\t<button type=\"button\" class=\"gt-transpose-reset-btn\" id=\"gt-transpose-reset\" title=\"Reset to standard pitch\">Reset<\/button>\n\t\t\t\t<\/div>\n<\/p><\/div>\n<div class=\"gt-quick-drops\">\n\t\t\t\t<span class=\"gt-quick-label\">Quick Drop:<\/span><br \/>\n\t\t\t\t<button type=\"button\" class=\"gt-drop-pill is-active\" data-semitones=\"0\" title=\"Standard pitch (0)\">Std (0)<\/button><br \/>\n\t\t\t\t<button type=\"button\" class=\"gt-drop-pill\" data-semitones=\"-1\" title=\"Drop 1 semitone (Eb Standard)\">-1 (Eb)<\/button><br \/>\n\t\t\t\t<button type=\"button\" class=\"gt-drop-pill\" data-semitones=\"-2\" title=\"Drop 2 semitones (D Standard)\">-2 (D)<\/button><br \/>\n\t\t\t\t<button type=\"button\" class=\"gt-drop-pill\" data-semitones=\"-3\" title=\"Drop 3 semitones (Db Standard)\">-3 (Db)<\/button><br \/>\n\t\t\t\t<button type=\"button\" class=\"gt-drop-pill\" data-semitones=\"-4\" title=\"Drop 4 semitones (C Standard)\">-4 (C)<\/button><br \/>\n\t\t\t\t<button type=\"button\" class=\"gt-drop-pill\" data-semitones=\"-5\" title=\"Drop 5 semitones (B Standard)\">-5 (B)<\/button><br \/>\n\t\t\t\t<button type=\"button\" class=\"gt-drop-pill\" data-semitones=\"-6\" title=\"Drop 6 semitones (Bb \/ A# Standard)\">-6 (A#\/Bb)<\/button>\n\t\t\t<\/div>\n<\/p><\/div>\n<p>\t\t<!-- Central Needle & Gauge Card --><\/p>\n<div class=\"gt-meter-card\" id=\"gt-meter-card\">\n<div class=\"gt-status-badge\" id=\"gt-status-badge\">Ready \u2014 Click Start Tuner<\/div>\n<p>\t\t\t<!-- Arc Needle Meter --><\/p>\n<div class=\"gt-dial-wrap\">\n\t\t\t\t<svg class=\"gt-dial-svg\" viewBox=\"0 0 320 160\" preserveAspectRatio=\"xMidYMid meet\">\n\t\t\t\t\t<!-- Background Track Arc -->\n\t\t\t\t\t<path class=\"gt-dial-track\" d=\"M 30 150 A 130 130 0 0 1 290 150\" \/>\n\t\t\t\t\t<!-- Flat Zone (Orange) -->\n\t\t\t\t\t<path class=\"gt-dial-zone-flat\" d=\"M 40 148 A 125 125 0 0 1 140 32\" \/>\n\t\t\t\t\t<!-- In-Tune Target Zone (Green) -->\n\t\t\t\t\t<path class=\"gt-dial-zone-tune\" d=\"M 148 27 A 125 125 0 0 1 172 27\" \/>\n\t\t\t\t\t<!-- Sharp Zone (Red) -->\n\t\t\t\t\t<path class=\"gt-dial-zone-sharp\" d=\"M 180 32 A 125 125 0 0 1 280 148\" \/>\n<p>\t\t\t\t\t<!-- Scale Tick Marks -->\n\t\t\t\t\t<g stroke=\"#94a3b8\" stroke-width=\"1.5\">\n\t\t\t\t\t\t<!-- -50 cents -->\n\t\t\t\t\t\t<line x1=\"30\" y1=\"150\" x2=\"42\" y2=\"150\" \/>\n\t\t\t\t\t\t<!-- -40 cents -->\n\t\t\t\t\t\t<line x1=\"45\" y1=\"115\" x2=\"55\" y2=\"119\" \/>\n\t\t\t\t\t\t<!-- -30 cents -->\n\t\t\t\t\t\t<line x1=\"68\" y1=\"84\" x2=\"77\" y2=\"91\" \/>\n\t\t\t\t\t\t<!-- -20 cents -->\n\t\t\t\t\t\t<line x1=\"100\" y1=\"58\" x2=\"107\" y2=\"67\" \/>\n\t\t\t\t\t\t<!-- -10 cents -->\n\t\t\t\t\t\t<line x1=\"135\" y1=\"41\" x2=\"139\" y2=\"52\" \/>\n\t\t\t\t\t\t<!-- 0 cents (Center In-Tune Target) -->\n\t\t\t\t\t\t<line x1=\"160\" y1=\"20\" x2=\"160\" y2=\"38\" stroke=\"#10b981\" stroke-width=\"3\" \/>\n\t\t\t\t\t\t<!-- +10 cents -->\n\t\t\t\t\t\t<line x1=\"185\" y1=\"41\" x2=\"181\" y2=\"52\" \/>\n\t\t\t\t\t\t<!-- +20 cents -->\n\t\t\t\t\t\t<line x1=\"220\" y1=\"58\" x2=\"213\" y2=\"67\" \/>\n\t\t\t\t\t\t<!-- +30 cents -->\n\t\t\t\t\t\t<line x1=\"252\" y1=\"84\" x2=\"243\" y2=\"91\" \/>\n\t\t\t\t\t\t<!-- +40 cents -->\n\t\t\t\t\t\t<line x1=\"275\" y1=\"115\" x2=\"265\" y2=\"119\" \/>\n\t\t\t\t\t\t<!-- +50 cents -->\n\t\t\t\t\t\t<line x1=\"290\" y1=\"150\" x2=\"278\" y2=\"150\" \/>\n\t\t\t\t\t<\/g>\n\t\t\t\t<\/svg><\/p>\n<p>\t\t\t\t<!-- Dynamic Needle --><\/p>\n<div class=\"gt-needle\" id=\"gt-needle\"><\/div>\n<div class=\"gt-needle-pivot\"><\/div>\n<\/p><\/div>\n<p>\t\t\t<!-- Note Letter & Octave Readout --><\/p>\n<div class=\"gt-note-box\">\n\t\t\t\t<span class=\"gt-note-letter\" id=\"gt-note-letter\">\u2014<\/span><br \/>\n\t\t\t\t<span class=\"gt-note-octave\" id=\"gt-note-octave\"><\/span>\n\t\t\t<\/div>\n<p>\t\t\t<!-- Live & Target Frequencies --><\/p>\n<div class=\"gt-freq-box\">\n\t\t\t\t<span class=\"gt-live-freq\" id=\"gt-live-freq\">0.0 Hz<\/span><br \/>\n\t\t\t\t<span class=\"gt-target-freq\" id=\"gt-target-freq\">Target: Pluck any string<\/span>\n\t\t\t<\/div>\n<p>\t\t\t<!-- Cents Offset Indicator --><\/p>\n<div class=\"gt-cents-val\" id=\"gt-cents-val\">0 cents<\/div>\n<p>\t\t\t<!-- Microphone Input Level Bar --><\/p>\n<div class=\"gt-level-wrap\" title=\"Microphone Input Energy Level\">\n\t\t\t\t<span>Mic:<\/span><\/p>\n<div class=\"gt-level-bar-track\">\n<div class=\"gt-level-bar-fill\" id=\"gt-level-bar-fill\"><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<p>\t\t<!-- Main Start Action Button --><\/p>\n<div class=\"gt-main-actions\">\n\t\t\t<button type=\"button\" class=\"gt-start-btn\" id=\"gt-start-btn\"><br \/>\n\t\t\t\t<svg viewBox=\"0 0 24 24\" width=\"18\" height=\"18\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\">\n\t\t\t\t\t<path d=\"M12 1a3 3 0 0 0-3 3v8a3 3 0 0 0 6 0V4a3 3 0 0 0-3-3z\"><\/path>\n\t\t\t\t\t<path d=\"M19 10v2a7 7 0 0 1-14 0v-2\"><\/path>\n\t\t\t\t\t<line x1=\"12\" y1=\"19\" x2=\"12\" y2=\"23\"><\/line>\n\t\t\t\t\t<line x1=\"8\" y1=\"23\" x2=\"16\" y2=\"23\"><\/line>\n\t\t\t\t<\/svg><br \/>\n\t\t\t\tStart Tuner (Enable Mic)<br \/>\n\t\t\t<\/button>\n\t\t<\/div>\n<p>\t\t<!-- Interactive Strings Fretboard --><\/p>\n<div class=\"gt-fretboard-section\">\n<div class=\"gt-section-header\">\n<div class=\"gt-section-header-left\">\n<h3 class=\"gt-section-title\">Instrument Strings &amp; Tone Pluckers<\/h3>\n<p>\t\t\t\t\t<span class=\"gt-section-hint\">Click any string card to lock or play acoustic reference pluck<\/span>\n\t\t\t\t<\/div>\n<div class=\"gt-section-header-right\">\n\t\t\t\t\t<button type=\"button\" class=\"gt-custom-edit-btn\" id=\"gt-custom-edit-toggle\" title=\"Customize individual string notes and octaves\"><br \/>\n\t\t\t\t\t\t<svg viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M11 4H4a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7\"><\/path><path d=\"M18.5 2.5a2.121 2.121 0 0 1 3 3L12 15l-4 1 1-4 9.5-9.5z\"><\/path><\/svg><br \/>\n\t\t\t\t\t\tCustomize Strings<br \/>\n\t\t\t\t\t<\/button><br \/>\n\t\t\t\t\t<select class=\"gt-string-count-select\" id=\"gt-string-count-select\" title=\"Number of strings\"><option value=\"6\" selected>6 Strings (Guitar)<\/option><option value=\"4\">4 Strings (Bass \/ Uke)<\/option><option value=\"7\">7 Strings (Extended)<\/option><option value=\"8\">8 Strings (Extended)<\/option><\/select>\n\t\t\t\t<\/div>\n<\/p><\/div>\n<div class=\"gt-strings-wrap\" id=\"gt-strings-wrap\">\n\t\t\t\t<!-- Injected dynamically by guitar-tuner.js -->\n\t\t\t<\/div>\n<\/p><\/div>\n<p>\t\t<!-- Settings & Custom Tuning Grid --><\/p>\n<div class=\"gt-settings-grid\">\n<div class=\"gt-setting-item\">\n\t\t\t\t<label class=\"gt-setting-label\" for=\"gt-tuning-select\">Instrument &amp; Tuning Preset:<\/label><br \/>\n\t\t\t\t<select class=\"gt-select\" id=\"gt-tuning-select\"><option value=\"guitar-standard\">Guitar \u2014 Standard (E A D G B E)<\/option><option value=\"guitar-drop-d\">Guitar \u2014 Drop D (D A D G B E)<\/option><option value=\"guitar-dadgad\">Guitar \u2014 DADGAD (Celtic \/ Folk)<\/option><option value=\"guitar-half-step\">Guitar \u2014 Half Step Down (Eb Ab Db Gb Bb Eb)<\/option><option value=\"guitar-full-step\">Guitar \u2014 Full Step Down (D G C F A D)<\/option><option value=\"guitar-open-d\">Guitar \u2014 Open D (D A D F# A D)<\/option><option value=\"guitar-open-g\">Guitar \u2014 Open G (D G D G B D)<\/option><option value=\"guitar-drop-c\">Guitar \u2014 Drop C (C G C F A D)<\/option><option value=\"bass-4\">Bass Guitar \u2014 4 String (E A D G)<\/option><option value=\"bass-5\">Bass Guitar \u2014 5 String (B E A D G)<\/option><option value=\"ukulele-c\">Ukulele \u2014 Standard C (G C E A)<\/option><option value=\"custom\">Custom Tuning (User Defined Notes)<\/option><option value=\"chromatic\">Chromatic Tuner (All 12 Notes)<\/option><\/select>\n\t\t\t<\/div>\n<div class=\"gt-setting-item\">\n\t\t\t\t<label class=\"gt-setting-label\" for=\"gt-a4-select\">Concert Pitch Calibration (A4):<\/label><br \/>\n\t\t\t\t<select class=\"gt-select\" id=\"gt-a4-select\"><option value=\"440\" selected>A4 = 440 Hz (Standard Concert Pitch)<\/option><option value=\"432\">A4 = 432 Hz (Pythagorean \/ Verdi)<\/option><option value=\"442\">A4 = 442 Hz (European Concert Pitch)<\/option><option value=\"444\">A4 = 444 Hz (Symphonic Bright)<\/option><\/select>\n\t\t\t<\/div>\n<div class=\"gt-toggle-item\">\n\t\t\t\t<label class=\"gt-toggle-label\" for=\"gt-auto-detect-toggle\">Auto-Detect String<\/label><br \/>\n\t\t\t\t<label class=\"gt-switch\"><br \/>\n\t\t\t\t\t<input type=\"checkbox\" id=\"gt-auto-detect-toggle\" checked><br \/>\n\t\t\t\t\t<span class=\"gt-slider-round\"><\/span><br \/>\n\t\t\t\t<\/label>\n\t\t\t<\/div>\n<div class=\"gt-toggle-item\">\n\t\t\t\t<label class=\"gt-toggle-label\" for=\"gt-repeat-toggle\">Continuous Reference Drone<\/label><br \/>\n\t\t\t\t<label class=\"gt-switch\"><br \/>\n\t\t\t\t\t<input type=\"checkbox\" id=\"gt-repeat-toggle\"><br \/>\n\t\t\t\t\t<span class=\"gt-slider-round\"><\/span><br \/>\n\t\t\t\t<\/label>\n\t\t\t<\/div>\n<\/p><\/div>\n<p>\t\t<!-- Keyboard Shortcuts Bar --><\/p>\n<div class=\"gt-shortcuts-bar\">\n\t\t\t<span><kbd>Space<\/kbd> Start \/ Stop Mic<\/span><br \/>\n\t\t\t<span><kbd>1<\/kbd> to <kbd>6<\/kbd> Pluck String<\/span><br \/>\n\t\t\t<span><kbd>A4<\/kbd> 440 Hz Standard<\/span>\n\t\t<\/div>\n<\/p><\/div>\n<\/div>\n<\/section>\n<p><!-- Comparison Table 1: Standard Guitar Tuning Frequencies Chart --><\/p>\n<section class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\" style=\"padding-bottom:40px\">\n<div class=\"seo-header-block\" style=\"margin-top:56px\">\n<p class=\"section-kicker\">GUITAR TUNING REFERENCE<\/p>\n<h2 class=\"section-heading\">Standard Guitar Tuning Frequencies Chart (E A D G B E)<\/h2>\n<p class=\"seo-section-subtitle\">Precise scientific pitch notation, fundamental acoustic frequencies, and recommended string gauges calibrated to international concert pitch (A4 = 440 Hz)<\/p>\n<\/div>\n<div class=\"ucd-seo-table-wrap\">\n<table class=\"ucd-seo-table\">\n<thead>\n<tr>\n<th>String<\/th>\n<th>Note Name<\/th>\n<th>Scientific Pitch<\/th>\n<th>Target Frequency<\/th>\n<th>Wavelength (Air)<\/th>\n<th>Typical Gauge<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>String 6 (Thickest)<\/strong><\/td>\n<td>Low E<\/td>\n<td>E2<\/td>\n<td><span class=\"ucd-badge-green\">82.41 Hz<\/span><\/td>\n<td>4.16 m<\/td>\n<td>.046 \u2013 .052 (Wound Bronze \/ Nickel)<\/td>\n<\/tr>\n<tr>\n<td><strong>String 5<\/strong><\/td>\n<td>A<\/td>\n<td>A2<\/td>\n<td><span class=\"ucd-badge-green\">110.00 Hz<\/span><\/td>\n<td>3.12 m<\/td>\n<td>.036 \u2013 .042 (Wound)<\/td>\n<\/tr>\n<tr>\n<td><strong>String 4<\/strong><\/td>\n<td>D<\/td>\n<td>D3<\/td>\n<td><span class=\"ucd-badge-green\">146.83 Hz<\/span><\/td>\n<td>2.34 m<\/td>\n<td>.026 \u2013 .032 (Wound)<\/td>\n<\/tr>\n<tr>\n<td><strong>String 3<\/strong><\/td>\n<td>G<\/td>\n<td>G3<\/td>\n<td><span class=\"ucd-badge-green\">196.00 Hz<\/span><\/td>\n<td>1.75 m<\/td>\n<td>.016 \u2013 .017 (Plain or Wound)<\/td>\n<\/tr>\n<tr>\n<td><strong>String 2<\/strong><\/td>\n<td>B<\/td>\n<td>B3<\/td>\n<td><span class=\"ucd-badge-green\">246.94 Hz<\/span><\/td>\n<td>1.39 m<\/td>\n<td>.011 \u2013 .014 (Plain Steel)<\/td>\n<\/tr>\n<tr>\n<td><strong>String 1 (Thinnest)<\/strong><\/td>\n<td>High E<\/td>\n<td>E4<\/td>\n<td><span class=\"ucd-badge-green\">329.63 Hz<\/span><\/td>\n<td>1.04 m<\/td>\n<td>.009 \u2013 .010 (Plain Steel)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><!-- Comparison Table 2: Popular Alternate Guitar Tunings --><\/p>\n<div class=\"seo-header-block\" style=\"margin-top:56px\">\n<p class=\"section-kicker\">ALTERNATE TUNINGS COMPASS<\/p>\n<h2 class=\"section-heading\">Popular Alternate Guitar Tunings Reference<\/h2>\n<p class=\"seo-section-subtitle\">Open chords, modal drones, and heavy drop tunings for acoustic, rock, blues, and fingerstyle guitarists<\/p>\n<\/div>\n<div class=\"ucd-seo-table-wrap\">\n<table class=\"ucd-seo-table\">\n<thead>\n<tr>\n<th>Tuning Name<\/th>\n<th>String Sequence (6 to 1)<\/th>\n<th>Root Key<\/th>\n<th>Common Genres<\/th>\n<th>Notable Artists \/ Songs<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Drop D<\/strong><\/td>\n<td><span class=\"ucd-badge-green\">D2 \u2013 A2 \u2013 D3 \u2013 G3 \u2013 B3 \u2013 E4<\/span><\/td>\n<td><span class=\"ucd-badge-red\">D Minor \/ Major<\/span><\/td>\n<td>Hard Rock, Metal, Grunge, Blues<\/td>\n<td>Nirvana, Soundgarden, Foo Fighters<\/td>\n<\/tr>\n<tr>\n<td><strong>DADGAD (Celtic)<\/strong><\/td>\n<td><span class=\"ucd-badge-green\">D2 \u2013 A2 \u2013 D3 \u2013 G3 \u2013 A3 \u2013 D4<\/span><\/td>\n<td><span class=\"ucd-badge-red\">D Modal (Dsus4)<\/span><\/td>\n<td>Celtic, Folk, Fingerstyle, Acoustic<\/td>\n<td>Jimmy Page (Kashmir), Pierre Bensusan<\/td>\n<\/tr>\n<tr>\n<td><strong>Half Step Down (Eb)<\/strong><\/td>\n<td><span class=\"ucd-badge-green\">Eb2 \u2013 Ab2 \u2013 Db3 \u2013 Gb3 \u2013 Bb3 \u2013 Eb4<\/span><\/td>\n<td><span class=\"ucd-badge-red\">Eb Standard<\/span><\/td>\n<td>Classic Rock, Blues Rock, Grunge<\/td>\n<td>Jimi Hendrix, Stevie Ray Vaughan, Guns N&#8217; Roses<\/td>\n<\/tr>\n<tr>\n<td><strong>Open D<\/strong><\/td>\n<td><span class=\"ucd-badge-green\">D2 \u2013 A2 \u2013 D3 \u2013 F#3 \u2013 A3 \u2013 D4<\/span><\/td>\n<td><span class=\"ucd-badge-red\">D Major<\/span><\/td>\n<td>Delta Blues, Slide Guitar, Folk<\/td>\n<td>Bob Dylan, Elmore James, Joni Mitchell<\/td>\n<\/tr>\n<tr>\n<td><strong>Open G<\/strong><\/td>\n<td><span class=\"ucd-badge-green\">D2 \u2013 G2 \u2013 D3 \u2013 G3 \u2013 B3 \u2013 D4<\/span><\/td>\n<td><span class=\"ucd-badge-red\">G Major<\/span><\/td>\n<td>Blues, Classic Rock, Slide<\/td>\n<td>The Rolling Stones (Keith Richards), Muddy Waters<\/td>\n<\/tr>\n<tr>\n<td><strong>Drop C<\/strong><\/td>\n<td><span class=\"ucd-badge-green\">C2 \u2013 G2 \u2013 C3 \u2013 F3 \u2013 A3 \u2013 D4<\/span><\/td>\n<td><span class=\"ucd-badge-red\">C<\/span><\/td>\n<td>Metalcore, Post-Hardcore, Modern Metal<\/td>\n<td>Deftones, Slipknot, Bullet for My Valentine<\/td>\n<\/tr>\n<tr>\n<td><strong>4-String Bass Standard<\/strong><\/td>\n<td><span class=\"ucd-badge-green\">E1 \u2013 A1 \u2013 D2 \u2013 G2<\/span><\/td>\n<td><span class=\"ucd-badge-red\">Standard Bass<\/span><\/td>\n<td>All Musical Genres<\/td>\n<td>One octave lower than guitar strings 6 to 3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p><!-- Step-by-Step Practical Tuning Guide Cards --><\/p>\n<div class=\"seo-header-block\" style=\"margin-top:56px\">\n<p class=\"section-kicker\">PRACTICE &amp; TECHNIQUE GUIDE<\/p>\n<h2 class=\"section-heading\">How to Tune Your Guitar Accurately: Step-by-Step Guide<\/h2>\n<p class=\"seo-section-subtitle\">Master both microphone pitch detection and traditional tuning by ear<\/p>\n<\/div>\n<div class=\"ucd-guide-card\">\n<h3>1. Position Your Device &amp; Isolate Background Noise<\/h3>\n<p>Place your smartphone, laptop, or tablet roughly 6 to 12 inches from the acoustic guitar soundhole or electric guitar amp. Minimize background television, chatter, or fans so the condenser microphone captures pure acoustic string vibrations.<\/p>\n<\/div>\n<div class=\"ucd-guide-card\">\n<h3>2. Tune From Low Strings to High Strings (Neck Relief Balance)<\/h3>\n<p>Always tune the thickest 6th string (Low E) first, then proceed through A, D, G, B, and High E. Guitar necks withstand over 150 lbs of overall tension; tuning heavy strings first establishes correct truss rod counter-tension so lighter strings stay stable.<\/p>\n<\/div>\n<div class=\"ucd-guide-card\">\n<h3>3. Pluck Near the 12th Fret with Your Thumb Pad<\/h3>\n<p>Guitars naturally produce strong octave overtones. Plucking gently near the 12th fret with your thumb pad dampens harsh metallic upper harmonics and accentuates the fundamental pitch (f0), giving the pitch detection algorithm a rock-solid lock.<\/p>\n<\/div>\n<div class=\"ucd-guide-card\">\n<h3>4. Always Tune UP Into the Pitch (Eliminate Peg Backlash)<\/h3>\n<p>If your string is sharp, drop the pitch <em>below<\/em> the target note, then slowly tune up into the green center zone. Tuning upward keeps the string peg teeth under forward tension and prevents machine head gear slippage during vigorous playing.<\/p>\n<\/div>\n<div class=\"ucd-guide-card\">\n<h3>5. Verify Intonation at the 12th Fret<\/h3>\n<p>Once open strings are in tune, lightly touch string 12 directly above the fretwire to sound an acoustic harmonic, then compare it to the fretted note at fret 12. If the fretted note is sharper than the harmonic, adjust your bridge saddle backward.<\/p>\n<\/div>\n<p><!-- Agency Pilot CTA Banner --><\/p>\n<div class=\"ucd-agency-cta-box\">\n<h3>Building Custom Audio Tools, Web Apps, or Music Software?<\/h3>\n<p>UCDREAMS engineers high-performance web audio applications, interactive canvas editors, and scalable media pipelines. Partner with our senior full-stack development team with zero upfront design cost through our exclusive pilot program.<\/p>\n<p><a href=\"https:\/\/ucdreams.com\/apply-pilot\/\" class=\"ucd-agency-cta-btn\">Apply for Pilot Program &rarr;<\/a>\n<\/div>\n<p><!-- FAQ Section with Native Accordions --><\/p>\n<div class=\"seo-header-block\" style=\"margin-top:56px\">\n<p class=\"section-kicker\">FREQUENTLY ASKED QUESTIONS<\/p>\n<h2 class=\"section-heading\">Everything You Need to Know About Online Guitar Tuners<\/h2>\n<p class=\"seo-section-subtitle\">Common questions about microphone accuracy, audio pitch detection, and guitar maintenance<\/p>\n<\/div>\n<div class=\"seo-faq-container\">\n<details class=\"seo-faq-item ucd-faq-item\">\n<summary class=\"seo-faq-summary ucd-faq-btn\">How do I drop all guitar strings down by 4 semitones or tune down to A# \/ Bb?<\/summary>\n<div class=\"seo-faq-body ucd-faq-answer\">To drop all strings down equally across the entire instrument, use the <strong>Drop \/ Capo Transpose<\/strong> toolbar directly above the meter. Clicking <strong>-4 (C)<\/strong> lowers every string by 4 semitones (transforming Standard E into C Standard: C \u2013 F \u2013 A# \u2013 D# \u2013 G \u2013 C). If you want E to drop to A# \/ Bb, that is a drop of 6 semitones (a tritone); click <strong>-6 (A#\/Bb)<\/strong>. You can also click <strong>Customize Strings<\/strong> to set any string to any individual note (C, C#, D, D#, E, F, F#, G, G#, A, A#, B) and octave independently.<\/div>\n<\/details>\n<details class=\"seo-faq-item ucd-faq-item\">\n<summary class=\"seo-faq-summary ucd-faq-btn\">Why is my guitar tuner jumping between different notes?<\/summary>\n<div class=\"seo-faq-body ucd-faq-answer\">Guitars produce natural overtones where the 2nd harmonic (one octave higher) is often louder than the fundamental note. To fix jumpy readings, pluck the string gently near the 12th fret with your thumb pad rather than near the bridge with a hard pick. This emphasizes the fundamental frequency and reduces treble harmonics.<\/div>\n<\/details>\n<details class=\"seo-faq-item ucd-faq-item\">\n<summary class=\"seo-faq-summary ucd-faq-btn\">How accurate is this browser guitar tuner compared to a hardware clip-on tuner?<\/summary>\n<div class=\"seo-faq-body ucd-faq-answer\">Our online tuner uses sub-sample parabolic autocorrelation running on the Web Audio API at 44.1 kHz \/ 48 kHz. It measures pitch with sub-Hertz resolution (&lt; 0.1 Hz), achieving accuracy within &plusmn;1 cent (well beyond the human ear&#8217;s 3\u20135 cent pitch discrimination threshold), matching professional clip-on pedal tuners.<\/div>\n<\/details>\n<details class=\"seo-faq-item ucd-faq-item\">\n<summary class=\"seo-faq-summary ucd-faq-btn\">Can I tune an electric guitar without an amplifier?<\/summary>\n<div class=\"seo-faq-body ucd-faq-answer\">Yes! Simply hold your smartphone or laptop microphone directly over the electric guitar&#8217;s pickups or upper body wood while plucking. The sensitive condenser microphone will clearly pick up the unamplified string vibrations.<\/div>\n<\/details>\n<details class=\"seo-faq-item ucd-faq-item\">\n<summary class=\"seo-faq-summary ucd-faq-btn\">What is the difference between 440 Hz and 432 Hz tuning?<\/summary>\n<div class=\"seo-faq-body ucd-faq-answer\">A4 = 440 Hz is the international standard concert pitch adopted by ISO in 1955. A4 = 432 Hz (often known as Verdi&#8217;s A or Pythagorean tuning) tunes every note roughly 31.8 cents flatter. Our tuner allows you to select 440 Hz, 432 Hz, 442 Hz, or 444 Hz with real-time target frequency recalibration.<\/div>\n<\/details>\n<\/div>\n<\/section>\n<p><!-- Related Video & Audio Tools --><\/p>\n<section class=\"wp-block-group tools-area related-area is-layout-constrained wp-block-group-is-layout-constrained\" style=\"padding-top:20px;padding-bottom:80px\">\n<p class=\"section-kicker wp-block-paragraph\">Music &amp; Audio Tools<\/p>\n<h2 class=\"wp-block-heading section-heading\">More Music &amp; Audio Tools<\/h2>\n<div class=\"wp-block-group tools-grid is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group tool-card is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"icon-box\"><svg viewBox=\"0 0 24 24\" width=\"24\" height=\"24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M12 2L6 22h12L12 2z\"\/><line x1=\"12\" y1=\"6\" x2=\"18\" y2=\"15\"\/><circle cx=\"18\" cy=\"15\" r=\"2\"\/><\/svg><\/div>\n<h4 class=\"wp-block-heading tool-title\"><a href=\"\/tools\/metronome\/\">Online Metronome<\/a><\/h4>\n<p class=\"tool-tag wp-block-paragraph\">Music Practice<\/p>\n<p class=\"tool-descr wp-block-paragraph\">Classic mechanical pendulum metronome with precision Web Audio timing and tap tempo.<\/p>\n<\/div>\n<div class=\"wp-block-group tool-card is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"icon-box\"><svg viewBox=\"0 0 24 24\" width=\"24\" height=\"24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M3 18v-6a9 9 0 0 1 18 0v6\"\/><path d=\"M21 19a2 2 0 0 1-2 2h-1a2 2 0 0 1-2-2v-3a2 2 0 0 1 2-2h3zM3 19a2 2 0 0 0 2 2h1a2 2 0 0 0 2-2v-3a2 2 0 0 0-2-2H3z\"\/><\/svg><\/div>\n<h4 class=\"wp-block-heading tool-title\"><a href=\"\/tools\/audio-noise-remover\/\">AI Noise Remover<\/a><\/h4>\n<p class=\"tool-tag wp-block-paragraph\">Audio<\/p>\n<p class=\"tool-descr wp-block-paragraph\">Clean background hiss and noise from audio and instrument recordings.<\/p>\n<\/div>\n<div class=\"wp-block-group tool-card is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"icon-box\"><svg viewBox=\"0 0 24 24\" width=\"24\" height=\"24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M9 18V5l12-2v13\"\/><circle cx=\"6\" cy=\"18\" r=\"3\"\/><circle cx=\"18\" cy=\"16\" r=\"3\"\/><\/svg><\/div>\n<h4 class=\"wp-block-heading tool-title\"><a href=\"\/tools\/video-to-audio\/\">Video to Audio<\/a><\/h4>\n<p class=\"tool-tag wp-block-paragraph\">Audio<\/p>\n<p class=\"tool-descr wp-block-paragraph\">Extract high-quality MP3 tracks and guitar solos from videos instantly.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<p><!-- Schema JSON-LD --><br \/>\n<script type=\"application\/ld+json\">\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"WebApplication\",\n      \"name\": \"UCDreams Free Online Guitar Tuner\",\n      \"url\": \"https:\/\/ucdreams.com\/tools\/guitar-tuner\/\",\n      \"applicationCategory\": \"MusicApplication\",\n      \"operatingSystem\": \"All\",\n      \"offers\": {\n        \"@type\": \"Offer\",\n        \"price\": \"0\",\n        \"priceCurrency\": \"USD\"\n      },\n      \"description\": \"Accurate free online guitar tuner with microphone pitch detection, dynamic tuning needle gauge, and acoustic reference plucks. 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