Stop just playing songs. Understand them.
Key Helper sits next to the chord sheet and shows the song's key, what every chord is doing, and why the progression feels the way it does.
See what every chord is doing.
Some chords feel like home. Some pull you away. Some build tension that has to resolve. Key Helper colors each chord by its job, so you finally hear why the song moves the way it does.
Theory, on the songs you already play.
The key, the moment you open a song
Key, relative key and the scale notes, with a confidence score so you know when a song is ambiguous.
Every chord, by degree
Each chord becomes a Roman numeral with a color for its role, on the page and in the panel.
Key changes
When the chorus lifts to a new key, you see exactly where.
Why this works
Select a few chords you love. Get one clear sentence.
Hebrew songs too
Chord sheets over Hebrew lyrics read right to left, in the right order.
A face that feels the harmony.
Press play and the song moves through the panel one chord at a time. A little face reacts to each one: happy at home, tense on the dominant, surprised by a borrowed chord. Large text, calm colors, one idea at a time.
Cancel anytime in one click. No contracts.
- All features on every supported chord site
- Every new feature and site as it ships
- Use it on up to 3 browsers
- 14-day refund on your first payment
Install from the Chrome Web Store, then start Pro right inside the panel, so it unlocks automatically.
🔒 Secure checkout by Lemon Squeezy
Questions
Do I need to know music theory?
No. Key Helper explains everything in plain words. You learn the theory from songs you already like.
Which sites does it work on?
Tab4U, Ultimate Guitar and ChordU. More sites are on the way.
How much does it cost?
$4.99 a month. Cancel anytime in one click from the link in your receipt email, and you keep access until the end of the month you paid for.
I got a new computer. Do I pay again?
No. Choose "Already subscribed?" in the panel, enter your email, and type the 6-digit code we send you. One subscription covers up to 3 browsers.
Can I get a refund?
Yes. If Key Helper isn't for you, ask within 14 days of your first payment for a full refund. See the refund policy.
What data do you collect?
Only your name, email and subscription status. We never collect the songs you open or your browsing history. See the privacy policy.