What Is Morse Code?

Morse code is a way to send language when you only have a short signal and a long signal. A short signal is a dot (dit). A long signal is a dash (dah), three times the length of a dot. Put those together and you can spell with a buzzer, a flashlight, a telegraph key, or a string of beads.

This site uses International Morse Code — the set documented in ITU-R M.1677-1. It covers the Latin alphabet, digits 0–9, and a practical list of punctuation. Related codes exist for other scripts. They are not mixed in here, so a letter always means the same pattern.

Where it came from

Samuel Morse and Alfred Vail built the original American Morse system for the electrical telegraph in the 1830s and 1840s. Radio later needed a version that worked across languages and borders. That is International Morse, the one you will see on a modern Morse code chart and on most Morse code necklaces.

Frequent English letters got the shortest codes on purpose. E is a single dot. T is a single dash. Q, J, and Z take longer. That is why a word like THE flies and a word like QUIZ does not.

What people use it for now

Amateur radio still trains Morse. Some aviation and nautical signals keep the old distress rhythm. Outside of that, most searches are practical: how to write a name, how to check SOS, or how to encode I love you for a bracelet.

If you want the mechanics — gaps, playback, what this translator actually does — read how Morse code works. If you want to learn by ear, start with how to read Morse code and the A–Z alphabet.