Every guitar chord you are likely to meet is here: all twelve roots and 84 chord types, from major and minor to sevenths, sus chords, ninths, elevenths, thirteenths and altered jazz chords, 1,008 chords in all. Pick a root and a type, or just type the chord the way a song sheet writes it (F#m7, Bb/D, Cadd9) and it opens.
Each chord shows its notes spelled the right way (Bb major has D and F, not A# and E#), what each note is in the chord (root, third, fifth, seventh), and several shapes up and down the neck. The 100 chords you will play most have hand-checked shapes, the ones a teacher would show you, with finger numbers. Every other shape comes from a generator that keeps only what a real hand can play: four fingers at most, one of them flat as a barre if needed, no stretch wider than four frets, and muted strings only where a finger can actually mute them.
Every shape has a difficulty, from Beginner to Expert, so you can find an F without a full barre or a jazz chord your hand can reach. Tap a shape to hear it strummed in the guitar sound you chose, or play it one string at a time to hear every note ring.
Choose a bass note to get slash chords and inversions (D/F#, C/G, Am/G), switch to drop D, DADGAD, half-step down or open tunings, and show fingers, note names or degrees on the dots. Print a chord sheet or save an image to share.