Which one do you need?
- Your sheet is chords above the words and you want it to survive being reflowed — the converter. It attaches each chord to a syllable instead of to a column.
- The song sits wrong for your voice — the transposer. It moves the whole sheet and leaves the words alone.
- The key is right and your hand is not — the capo calculator. Same sound, different shapes.
- You have a slot to fill and a list to fit into it — the setlist calculator. Gaps included, because they are what makes a set overrun.
Why these run in your browser
Because you have not signed in, may never sign in, and are holding a chord sheet you want dealt with now. A round trip to a server would buy you a spinner and cost us the reason you trusted the page — so the work happens on your own machine, and a song nobody has heard yet stays that way. Nothing is uploaded, nothing is stored, and none of the four asks for an account.
They are also not simplified copies of what Strumfolio does. The converter runs the same conversion the import screen runs; the capo calculator runs the same arithmetic the reading screen runs. What the app adds is memory — the key this song sits in for your voice, the fret it lives on, kept per song across every device you open it on, and readable with no signal.
If you would rather read than click: the blog covers what ChordPro is and why it outlives the app you type it in, what a capo does to the key, and what transposing changes and what it leaves alone.