Same shapes, new names
Chord transposer
A progression is text. G D Em C moved up two semitones is A E F#m D. The parser takes a leading note name, keeps the rest of the symbol — m, maj7, sus4, 7 — and moves the name. A slash chord moves both sides, so D/F# does not leave the bass behind. Spaces, commas and bar lines stay where you put them.
Keys and spelling
Choose a starting key and a destination and the semitone gap is the shortest upward path around the clock, from 0 to 11. F, Bb, Eb, Ab, Db and Gb are spelled with flats. If you drag the semitone slider instead, that number wins and the key menus are only a hint. Half-step-down players often keep saying “G” while the guitar sounds Gb. This page is how you write the sounding names when the chart has to match the singer, without touching a peg.
What it will mangle
Words that are not chords pass through. A typo like H7 is not a chord in this spelling; write B7. Nashville numbers are not converted. If a symbol looks wrong, the note was not one of A through G.
Questions
- Does Em become F#m or Gbm?
- Up two from E is F#. The quality m stays. Flat spelling is used when the target key is a flat key, so the same move into a flat key can print Gb minor instead.
- Will my guitar change pitch?
- No. Only the text changes. Tuning is the tuner’s job.