How do I transpose a chord progression to a new key?

Type or paste the chords on one line, like C Am F G, then either set the semitone amount or tap a target key. To go from C up to D you move +2 semitones, so C Am F G becomes D Bm G A. Going down works the same with a negative number: at -2 semitones the same line becomes A# Gm D# F, since C dropped two semitones is A#. Read the result, hit copy, and the new chart is ready.

Does it keep chord suffixes like m, 7 and maj7?

Yes. Only the root note and the slash bass move, the suffix is preserved exactly. Am7 transposed up 2 semitones becomes Bm7, Cmaj7 becomes Dmaj7, G7sus4 becomes A7sus4, and Cadd9 up 3 becomes D#add9. Whatever quality, extension or alteration you typed after the root letter travels with the chord, so a jazz chart keeps every voicing instruction it started with.

How does C up 2 semitones become D?

Semitones are the smallest step in Western tuning, one fret on a guitar or one piano key including the black ones. From C the chromatic steps are C, C#, D, so two semitones up from C lands on D. That is why a +2 transpose turns C Am F G into D Bm G A, and why moving a song from G to A is also +2. One whole tone always equals two semitones.

Should I spell accidentals with sharps or flats?

Pick whichever matches the key your chart lives in. The key of D uses sharps, so F# reads naturally there, while the key of F uses flats, so Bb is correct and A# would look wrong. The sharp or flat switch flips every black-key chord at once: C up 1 semitone shows as C# in sharp mode and Db in flat mode. They sound identical, the choice is about a clean, readable chart for the player.

How does this help with a guitar capo?

A capo on fret N raises every sounding chord by N semitones, so it is a physical transpose. Say a song is written in Bb but you want the easy open shapes of G. G to Bb is +3 semitones, so you transpose the chart down 3 to G shapes here, then clamp the capo on fret 3. You finger G, C, D and the guitar sounds Bb, Eb, F, the original key, with no barre chords.

What happens to slash chords and bar lines?

Slash chords move both parts. C/G up 2 becomes D/A, and D/F# up 2 becomes E/G#, so the bass note stays the correct interval below the chord. Bar lines, repeat percent signs, section labels like Verse: and any lyric words are passed through unchanged, because the tool only rewrites tokens it recognises as chords. Your chart keeps its layout, only the harmony shifts.

Drop a song into a singer's comfortable key

A vocalist can't reach the high notes of a chart written in B. Paste the whole progression, tap G as the target key, and every chord shifts down at once while the suffixes stay put. You hand the singer a chart they can actually belt, and the band reads the new chords straight off without anyone re-writing the chart by hand.

Set up guitar capo positions fast

You want to play a piano song in Eb on guitar without barre chords. Transpose the chart down to D or C open shapes, read the capo note to see which fret restores the original pitch, and clamp it there. The tool does the semitone math so you spend rehearsal playing, not counting frets on your fingers.

Match a backing track or sample loop

A loop you bought is in F# minor but your song sits in A minor. Work out the gap, transpose your chord chart by that many semitones, and your live parts line up with the track. The shareable URL lets you send the transposed chart to a bandmate so everyone rehearses against the same key.

Rewrite a lead sheet for a transposing instrument

A trumpet reads a whole tone up from concert pitch. Take the concert chart, transpose it +2 semitones, switch to the spelling the player expects, and the part is ready. Section labels and lyrics survive the pass, so a vocal lead sheet stays readable after the harmony moves.

Teach the circle of fifths by example

In a theory lesson, show the same I-vi-IV-V in every key by stepping the transpose up one semitone at a time. Students watch C Am F G become C# A#m F# G# then D Bm G A and so on, seeing how the pattern holds while the letters rotate. Share the link so they can repeat it at home.

Chord & Note Transposer — Change Key by Semitones

Move a whole progression up or down by semitones or to any key, suffix and slash bass kept, sharp or flat your call

Runs locally
Category Text
Best for Removing repetitive cleanup work from everyday writing and operations.

Notes or chords

Semitones (± half steps)

+2 (Up 2)

Accidental spelling

Transposed

D  Bm  G  A

Capo tip

Playing with a guitar capo? A capo on fret N raises every sounding chord by N semitones. So if a song is in B♭ and you want easy open shapes in G, that is +3 semitones — transpose down 3 here, then clamp the capo on fret 3 to sound the original key.

What this tool does

Free online chord and note transposer. Paste a line like C Am F G or a jazz chart like C Dm7 G7 / Em7 A7, choose how many semitones to move (or tap a target key) and read back the whole progression in the new key. It moves only the root and the slash bass note, so every suffix you wrote stays intact: Am7 becomes Bm7, Cmaj7 becomes Dmaj7, Dsus4 becomes Esus4, and C/G becomes D/A. A sharp or flat switch decides whether a black key prints as C# or Db, which matters when a singer needs the chart spelled one specific way. Bar lines, repeat marks and lyric words pass straight through untouched, so the shape of your chart survives the transpose. The built-in capo note tells you which fret to clamp to sound the original key while you play easy open shapes. Everything runs in your browser, one click copies the result, and the shareable URL reopens the exact chart and key. 100% client-side, nothing is uploaded.

Tool details

Input: Files + Text + Numbers; The page exposes text boxes, numeric controls, file pickers, or structured inputs depending on the tool.
Output: Live result + Copy + Preview; The result area focuses on usable output, with copy, download, or preview actions when supported.
Privacy: Browser-side processing; The main tool logic does not call an external API, so inputs normally stay in the current tab.
Save / share: Shareable URL state; Key settings are encoded in the URL so another person can reopen the same setup.
Performance budget: Initial JS <= 9 KB; No WASM budget is declared, keeping the tool quick to open on mobile.
Best fit: Text · Content Creator; Category and role tags drive related tools, internal links, and quick fit checks.

How to use

1. Input

Paste or drop your content into the tool panel.
2. Process

Click the button. All processing is local in your browser.
3. Copy / Download

Copy the result or download to disk in one click.

How Chord & Note Transposer fits into your work

Use it to clean, compare, reshape, or extract plain text before it goes into a document, CMS, spreadsheet, or prompt.

Text jobs

Removing repetitive cleanup work from everyday writing and operations.
Making text easier to compare, paste, publish, or feed into another tool.
Working with content locally when the text is private or unfinished.

Text checks

Scan for unintended whitespace, duplicate lines, and lost punctuation.
For long text, test the first few lines before applying the whole change.
Copy the final output only after checking the preview.

Good next steps

These links move the current task into a more complete workflow.

Real-world use cases

Drop a song into a singer's comfortable key
A vocalist can't reach the high notes of a chart written in B. Paste the whole progression, tap G as the target key, and every chord shifts down at once while the suffixes stay put. You hand the singer a chart they can actually belt, and the band reads the new chords straight off without anyone re-writing the chart by hand.
Set up guitar capo positions fast
You want to play a piano song in Eb on guitar without barre chords. Transpose the chart down to D or C open shapes, read the capo note to see which fret restores the original pitch, and clamp it there. The tool does the semitone math so you spend rehearsal playing, not counting frets on your fingers.
Match a backing track or sample loop
A loop you bought is in F# minor but your song sits in A minor. Work out the gap, transpose your chord chart by that many semitones, and your live parts line up with the track. The shareable URL lets you send the transposed chart to a bandmate so everyone rehearses against the same key.
Rewrite a lead sheet for a transposing instrument
A trumpet reads a whole tone up from concert pitch. Take the concert chart, transpose it +2 semitones, switch to the spelling the player expects, and the part is ready. Section labels and lyrics survive the pass, so a vocal lead sheet stays readable after the harmony moves.
Teach the circle of fifths by example
In a theory lesson, show the same I-vi-IV-V in every key by stepping the transpose up one semitone at a time. Students watch C Am F G become C# A#m F# G# then D Bm G A and so on, seeing how the pattern holds while the letters rotate. Share the link so they can repeat it at home.

Common pitfalls

Reading sharps when the key wants flats. C# and Db sound identical but one looks wrong in context. In a flat key like F, flip the spelling switch to flats so Bb shows correctly instead of A#, otherwise the player second-guesses every accidental.
Forgetting the capo direction. A capo raises pitch, so to use easier shapes you transpose the chart DOWN, then the capo brings it back up. Transposing up and adding a capo stacks both shifts and lands you in the wrong key.
Typing chords the tool can't see as chords. A root must start with a letter A to G, optionally followed by a sharp or flat. Stray formatting like (C) or C-major glued together is treated as a plain word and passed through unchanged, so clean up the input to bare symbols first.

Privacy

The transpose runs entirely as plain JavaScript in your browser tab. The chord chart you paste, the key you choose and the result are never sent anywhere and nothing is logged. The one caveat: the shareable URL encodes your chart text and settings in the query string, so a share link pasted into chat will record the chords in the recipient server's access log. For an unreleased song, use the copy button and paste the text rather than sharing the URL.

FAQ

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Chord & Note Transposer — Change Key by Semitones

What this tool does

Tool details

How to use

1. Input

2. Process

3. Copy / Download

How Chord & Note Transposer fits into your work

Text jobs

Text checks

Good next steps

Real-world use cases

Drop a song into a singer's comfortable key

Set up guitar capo positions fast

Match a backing track or sample loop

Rewrite a lead sheet for a transposing instrument

Teach the circle of fifths by example

Common pitfalls

Privacy

FAQ

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