ClefDeck
Free music-reading lessons

Read music at a glance.

Five-minute lessons that teach you to read notes and key signatures instantly, without counting lines and spaces.

Start learning free Try a round
30 lessons Treble + bass clef All 15 key signatures No account needed

Name it in under two seconds.

Fast answers leave the pile. Slow ones come back. Misses come back sooner.

Time0.0 s
Which note is this?
0Cards left
0Instant
0Slow
0Missed

The full course has 30 lessons and tracks your speed on every note.

Start lesson 1

How it works

A few notes at a time

Start from landmarks like treble G and middle C, then fill in the notes around them.

Speed is the score

Every answer is timed. Under two seconds earns bonus XP and stars.

Four ways to practice

Name the note, find it on a piano, pick it from three staffs, and hear it played.

It remembers what you miss

Missed notes come back, and Practice drills your slowest ones.

Nine units, from middle C to seven flats.

Treble clef · Units 1–3
  1. Treble landmarksTreble G, middle C, the outer lines, high C
  2. Inside the staffEvery line and space between the landmarks
  3. Treble ledger linesDown to G3, up to E6
Bass clef · Units 4–6
  1. Bass landmarksBass F, middle C, the outer lines, low C
  2. Inside the bass staffEvery line and space between the landmarks
  3. Bass ledger linesDown to B1, up to G4
Key signatures · Units 7–9
  1. Sharp keysC through C♯ major, with relative minors
  2. Flat keysF through C♭ major, with relative minors
  3. Keys in bass clefAll 15 signatures, read in bass

Every note and key in the course.

Tap any card to see its back.

Questions

Do I need an account?

No. Progress saves in your browser, so use the same browser each time. Clearing browser data resets it.

Does it work on my phone?

Yes. Add it to your home screen to open it like an app.

What's covered?

Treble clef G3–E6, bass clef B1–G4, and all 15 major and minor key signatures in both clefs.

Why landmarks instead of "Every Good Boy Does Fine"?

Mnemonics make you count up from the bottom line. Landmarks like middle C and treble G let you read the notes around them directly.

Your first lesson takes five minutes.

Start learning free