Free Guitar Chord Finder

Look up any guitar chord with interactive fretboard diagrams. Covers Major, Minor, 7th, Maj7, Min7, Sus, Dim, Aug, Add9, and Power chords for all 12 root notes. Reverse lookup, audio playback, progressions, and transpose.

12 min read

How This Chord Finder Compares

Combining chord lookup, reverse identification, audio playback, and progression building in a single tool gives this chord finder a practical edge over alternatives that only show static diagrams.

Guitar Chords for Beginners

This video covers the most common open chords every beginner guitarist needs. Use the chord finder above to see the diagrams while you follow along.

Complete Guide to the Guitar Chord Finder

Learning guitar chords is the gateway to playing songs. Most popular music uses a relatively small set of chords, and once you know the basic open shapes, you can play hundreds of songs. This chord finder provides interactive fretboard diagrams for every common chord type across all 12 root notes, giving you a comprehensive reference that you can access anywhere without installing an app or buying a chord book.

The chord library covers the most important chord types. Major chords are the bright, happy-sounding foundation of most songs. Minor chords have a darker, more melancholic character. Seventh chords (dominant 7th) add tension that wants to resolve, making them essential for blues and jazz. Major 7th chords have a smooth, dreamy quality. Minor 7th chords combine the sadness of minor with the sophistication of the seventh. Sus2 and Sus4 chords replace the third with the second or fourth, creating an open, unresolved sound. Diminished chords are tense and symmetrical. Augmented chords sound unstable and dramatic. Add9 chords add color without the seventh. Power chords (root and fifth only) are the foundation of rock and punk guitar.

Reading Chord Diagrams

Each chord diagram shows a section of the guitar neck viewed from the front. The six vertical lines represent the six strings, with the low E (thickest) on the left and the high E (thinnest) on the right. The horizontal lines represent frets. Dots on the diagram show where to place your fingers. Numbers inside the dots indicate which finger to use (1 = index, 2 = middle, 3 = ring, 4 = pinky). An O above a string means play it open (no finger). An X means mute that string and do not let it ring.

Some chords require a barre, where one finger (usually the index) presses across all or several strings at the same fret. Barre chords are moveable shapes: the same finger pattern can be shifted up and down the neck to play different root notes. The F major barre chord shape, for example, becomes G major when moved up two frets.

Reverse Chord Lookup

The reverse chord finder is useful when you stumble upon a chord shape you like but do not know its name. Switch to reverse lookup mode, then click on the fretboard canvas to place fingers at the positions you are holding on your real guitar. The tool analyzes the resulting set of notes and identifies the most likely chord name. It considers all possible interpretations and selects the simplest name that matches the note set.

To use reverse lookup effectively, make sure you place dots on every string that is part of the chord. Click above the nut to cycle a string between open (O) and muted (X). The algorithm compares your note set against every chord in its database and returns the closest match, including the root and type.

Audio Playback

The Play Chord button strums the current chord using the Web Audio API. Six oscillators are created (one per string), each tuned to the frequency of that string at the indicated fret position. The oscillators are triggered in rapid succession (with a few milliseconds delay between each) to simulate the rolling strum of a guitar pick across the strings. Muted strings are skipped. The result is a recognizable representation of the chord that helps you verify you are looking at the right voicing before you practice it on your guitar.

Common Chord Progressions

The progressions section provides four widely used chord sequences. The I-IV-V progression is the foundation of rock, country, and blues. In the key of C, this gives you C-F-G. The I-V-vi-IV progression is behind countless pop hits from "Let It Be" to "No Woman, No Cry." In C, this is C-G-Am-F. The ii-V-I progression is the bread and butter of jazz harmony. In C, this is Dm-G-C. The 12-bar blues follows a specific pattern of I, IV, and V chords over 12 measures that has been the backbone of blues music for over a century.

The transpose feature shifts any progression to a different key. If a song in G is too high for your voice, transpose down two semitones to F. The tool recalculates all the chords in the progression automatically. This saves you from having to figure out the new chord names manually, which requires understanding the circle of fifths and key relationships.

Music Theory Behind Chords

Chords are built by stacking intervals above a root note. In the major scale, the intervals are defined by the pattern of whole and half steps: W-W-H-W-W-W-H. A major triad takes the 1st, 3rd, and 5th degrees of the major scale. In C major, these are C, E, and G. A minor triad flattens the 3rd: C, Eb, G. A dominant 7th chord adds the flatted 7th degree: C, E, G, Bb. Understanding these formulas lets you construct any chord from any root note.

On the guitar, the same chord can be played in multiple positions (voicings). An open C major chord uses the first three frets and includes open strings. A C major barre chord at the 8th fret uses the same notes but in a different arrangement across the strings. Both voicings contain the same three notes (C, E, G) but sound different due to the register and order of the notes. The chord finder shows the most common and practical voicing for each chord.

Practice Tips for Chord Changes

The biggest challenge for beginner guitarists is switching between chords smoothly. Start by practicing two-chord changes. Pick two chords you want to learn and alternate between them, one strum each, at a slow tempo. Focus on landing all your fingers at the same time rather than placing them one by one. Look for common fingers between chords: if both chords use the same finger on the same string, leave it in place while the other fingers move.

Use a metronome (available in the related tools section) to keep your changes on time. Start at 60 BPM with one chord change per measure. Only increase speed when you can make the change cleanly every time. Speed comes from accuracy, not from forcing your fingers to move faster.

Practice the chord progressions provided in this tool. Playing real progressions is more musical and motivating than random chord switches. Start with I-IV-V in the key of G (G-C-D), which uses three of the easiest open chords. Once comfortable, move to I-V-vi-IV in C (C-G-Am-F), which adds the Am shape and is the basis for many popular songs.

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