What Is Morse Code?

At heart, Morse code is beautifully simple. Every letter and number becomes a pattern of short and long signals, dots and dashes. Back in the 1830s, Samuel Morse and Alfred Vail built it for the electric telegraph, and it changed everything. A message that used to take days on horseback could suddenly cross a country in minutes. It was, in a very real sense, the world's first digital language, and nearly two hundred years later, people are still tapping it out.

International Morse code

Today's standard is International Morse, defined by ITU-R M.1677-1. A dot is one unit, a dash three units, letter gaps three units, word gaps seven. American Morse, an older railroad variant with different spacing, is no longer used for new work.

Where Morse code is still used

• Amateur radio (CW). Daily contacts and contests on HF bands.
• Aviation & maritime. Navigation beacons identify themselves in Morse.
• Accessibility. Morse input on mobile keyboards for users who prefer dit/dah entry.
• Emergency & military training. A backup when digital paths fail.
• Education & escape rooms. Puzzles, museums, and classrooms.

Try it yourself on the translator, or start learning with the beginner's guide.