Morse Code Converter
Convert between characters and Morse code, and play the code as audio
Features
Automatic character/code detection
Converts code-only input to characters, and other input to code
Switch between Latin and Japanese Morse
Supports both alphabets, numbers, symbols, and Kana
Play dots and dashes as audio
Adjust speed from 5 to 40 WPM and highlight the current character
Quick access to code reference tables
Open and compare Latin and Japanese Morse code tables instantly
How to Use
Select code type and notation
Choose between Latin or Japanese Morse, and between ". and -" or "· and −" notation
Enter character or Morse code
Paste a character or code into the input field. Separate code characters with spaces and words with /
Check results and play audio
View results as you type and listen with adjustable playback speed
Copy and share results
Use the Copy button to save results and paste into social media or messages
Use Cases
Decode Morse code found on social media
Paste Morse code from movies, anime, games, or social media to see what it says
Create messages in Morse code
Convert words like "thank you" to code and add a playful touch to social posts or greeting cards
Create puzzles for escape games
Use conversion results and code tables to create and verify cipher puzzles
Practice listening to radio and emergency signals
Start slowly and gradually increase speed while listening to the same code repeatedly to practice distinguishing dots from dashes
Basic Knowledge
What is Morse code?
Morse code is a communication system that represents characters using combinations of short sounds (dots) and long sounds (dashes). For example, the letter A is "· −" and E is "·".
- International Morse code：International Morse code is a globally standardized system representing 26 letters, numbers, and symbols, defined in the international standard ITU-R M.1677-1.
- Japanese Morse code：Japanese Morse code is a unique Japanese system representing 48 Kana sounds and marks like voiced sounds and long vowels. The same "· −" represents A in international code but イ in Japanese code.
Why SOS is "· · · − − − · · ·"
SOS was chosen as the international distress signal because its pattern—three dots, three dashes, three dots—is easy to remember and hard to misunderstand. It is not an abbreviation for "Save Our Ship." In actual distress signals, the three letters are sent continuously without breaks as a single code.
Rules for separating characters and words
The length of Morse code is determined using one dot as the basic unit. The ratio of lengths remains constant regardless of transmission speed.
- Code length：A dash is three times as long as a dot. Within one character, dots and dashes are separated by a silence equal to one dot.
- Character and word spacing：Characters are separated by silence equal to three dots, and words by silence equal to seven dots. When written as text, characters are separated by spaces and words by "/".
- Speed unit: WPM：WPM (words per minute) measures how many words can be sent in one minute. Using "PARIS" as the standard word, one dot's duration equals 1200÷WPM milliseconds. At 15 WPM, one dot is 80 milliseconds.
Safety and Privacy
Runs entirely in your browser
Your input data is processed only within your browser and is never sent externally.
Processing only in your browser
Conversion processing and sound generation is processed entirely within your browser, and input data is not sent to any server.
Communications encrypted with HTTPS
Page loading is also encrypted by TLS, and content cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
No automatic saving of results
Text and code you enter and input suggestions are not stored on the server.
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Updates
- update #325
Added Morse code converter: convert characters and signals bidirectionally, play Western and Japanese text as audio