Little signals. Secret messages.
Morse.
Letters, dots and dashes. Discover Morse code.
Correct answers0 / 0
Streak0
Exercise 01
What is this letter’s code?
Choose one of the four answers.
Morse alphabet — reference
Click a character to hear its code. Practise international Morse code for letters A–Z and digits 0–9.
Signal source: ITU-R M.1677
About this activity
Learn international Morse code for letters A–Z and digits 0–9. Start with Letter → code and choose the dots and dashes for the displayed character. Switch to Code → letter to identify a character from its signal.
How to play
Choose the exercise direction and character set, then select one of four answers. Listen to the signal as often as you like. The reference alphabet below plays each character's code.
A little tip
A dot is a short signal; a dash lasts three times longer. Start with letters, then add numbers when you feel comfortable.