Transpose
Singer wants it in A♭?
One tap.
Change the key of any ChordPro song instantly. Strofa understands chord grammar — every chord quality, extension and slash chord is transposed correctly, not just the root note.
How it works
Chord-grammar aware, not find-and-replace.
Tap the key badge in the song header to open the transpose controls. Drag the semitone stepper up or down — chords update in real time as you move, so you can see the result before you commit.
Strofa doesn't run a text search-and-replace on chord names. It parses each chord token semantically: G/B → A/C♯, Gmaj7 → Amaj7, Bdim → C♯dim, Cadd9 → Dadd9, Bb → B or C♭ depending on context. All chord qualities, extensions and slash chords are handled correctly.
This matters most in edge cases: a song in E♭ transposed up a fifth shouldn't give you B♭ chords written as A♯. Strofa uses the enharmonic that makes musical sense for the key.
- Transposing E♭ → B♭ gives B♭ Cm F Gm, not A♯ Bm E F♯m
- Slash chords: C/E → D/F♯ (not D/E♯)
- Extended chords: Fmaj9sus4 remains Fmaj9sus4-style after transposition
- Range: unlimited — go as many semitones as needed
Written in E · Capo 2 · Sounds in F♯
The guitarist with the capo reads E shapes. The pianist reads F♯. Both see what they need.
Per-song preferences
Save the key. Set your accidentals. Capo stays visible.
Hit the 💾 button after transposing to lock in the new key. Strofa stores it as the song's current key — the original is preserved as a reference and you can revert at any time. The saved key syncs to all your devices and to band members.
Each song has a flat/sharp preference. A musician in B♭ or E♭ usually wants flats; one in D or A wants sharps. Set it once, Strofa uses it whenever that song is transposed. The preference travels with the song to the cloud.
If the song has a capo set, Strofa shows two key references simultaneously: the written key (the shapes the guitarist plays) and the sounding key (what everyone else hears). The capo position is shown in the song header so you see it at a glance on stage.
Transposing a song that has a backing track attached? The track pitch-shifts automatically — no separate adjustment needed. See the Learn more → page for details.
Get started
The right key, every night.
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