Transpose a chord sheet to a new key

Shift recognized chord symbols in a chord sheet by a fixed signed number of semitones.

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ToolChord Key Transposer
Input
Output
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Preview

How it works

A pattern locates A–G roots with optional accidental, quality, number, and slash bass, then advances each root around a 12-semitone pitch-class array. Both parts of a slash chord move while unmatched lyric and punctuation text stay in place.

  • Offsets are limited to two octaves in either direction.
  • Flat input is normalized to sharp output because only sharp pitch-class names are stored.

Worked example

Transpose a chord sheet to a new key
Input
											Chord sheet: C Am F G7
Semitones: 2
Output
												D Bm G A7

When to use this

Guitarists adapt sheets to a singer, keyboard players shift slash chords, and rehearsals preserve lyrics while moving detected harmony.

Edge cases

  • Bb normalizes to A# before shifting and remains sharp-spelled in the result.
  • C/G moves both C and its G bass note by the selected interval.
  • A lyric token that resembles a chord can change accidentally because the matcher does not distinguish lyric lines from chord lines.