Free Morse Code Translator
Convert text to Morse code or Morse code back to text — with optional audio playback.
The clever reason "E" is a single dot
Morse code was developed by Samuel Morse and Alfred Vail in the 1830s and '40s for the electric telegraph, and one design choice built into it still stands out as remarkably forward-thinking: letter codes weren't assigned alphabetically or arbitrarily — they were assigned by how often each letter actually appears in English text. "E," the single most common letter in English, got the shortest possible code (one dot). "T," the second most common, got a single dash. Rare letters like "Q," "X," and "Z" were pushed to the longer, four-symbol codes. The effect is that an average message transmits noticeably faster than it would with an arbitrary assignment, since the letters used most often cost the least time to send — a frequency-based optimization for efficient transmission, decades before the mathematical field of information theory formalized why that works.
Frequently Asked Questions
How do I write Morse code so this tool can decode it?
Use a dot (.) for a short signal and a dash (-) for a long one, a single space between letters, and a forward slash (/) or double space between words — for example "... --- ..." decodes to SOS.
Does Morse code support lowercase letters or punctuation?
Morse code itself has no concept of upper/lowercase — this tool converts everything to uppercase automatically. Common punctuation (period, comma, question mark, and a few others) is supported; unsupported characters are skipped.
What does the audio playback actually play?
A short tone for each dot, a tone three times as long for each dash, with silence gaps between symbols, letters, and words matching the standard Morse timing ratios — close to what you'd hear over an actual radio.
Is Morse code still used for anything today?
Mostly amateur (ham) radio, aviation navigation beacons, and emergency signaling (SOS is still internationally recognized) — it's no longer used for commercial telegraphy, but it persists as a hobby and a backup signaling method.
Why does "E" use just one dot while other letters need up to four symbols?
Morse code's letter assignments were deliberately based on how frequently each letter appears in English — "E" and "T," the two most common letters, got the shortest possible codes so that an average message transmits faster overall, while rare letters like "Q" and "Z" were pushed to longer codes.
Who invented Morse code?
Samuel Morse and Alfred Vail developed it in the 1830s and '40s for use with the electric telegraph, which they were also working to commercialize at the time.