morse-code.html

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<p>paste text in the box below and then click one of the buttons</p>
<textarea id="src" cols="80" rows="10" placeholder="input text here"></textarea>
<hr>
<label for="lang-select">choose a morse code encoding type:</label>
<select id="lang-select">
  <option value="international">international (ITU)</option>
  <option value="international-non-latin">international (ITU) + non-latin extensions</option>
  <option value="american">american (Morse)</option>
  <option value="continental">continental (Gerke)</option>
</select>
<br>
<input type="checkbox" id="check-numbers" checked />
<label for="check-punctuation">numbers</label>
<br>
<input type="checkbox" id="check-punctuation" checked />
<label for="check-punctuation">punctuation</label>
<br>
<input type="checkbox" id="check-non-standard" />
<label for="check-non-standard">non-standard</label>
<hr>
<button onclick="encodeMorse()">encode morse code</button>
<button onclick="decodeMorse()">decode morse code</button>
<button onclick="decodeMorseBinary()">decode binary signal</button>
<hr>
<textarea id="dest" cols="80" rows="5"></textarea>
<div id="dest-signal"></div>
<h3>Notes</h3>
<ul>
  <li>a <b>dit</b> (written as a dot: '<code>.</code>') has a signal length of 1, a <b>dah</b> (written as a dash: '<code>-</code>') has a signal length of 3</code></li>
  <li>abnormal signal lengths, like those found in the american standard, are written directly as a plain hexadecimal digit</li>
  <li>typically all non-word, non-letter pauses last a single bit, but in some cases a signal length of 0 indicates an extended pause</li>
</ul>
<h3>See Also</h3>
<a href="https://www.britannica.com/topic/Morse-Code">britannica.com/topic/Morse-Code</a>
<br>
<a href="https://en.wikipedia.org/wiki/American_Morse_code">en.wikipedia.org/wiki/American_Morse_code</a>
<br>
<a href="https://en.wikipedia.org/wiki/Morse_code_for_non-Latin_alphabets">en.wikipedia.org/wiki/Morse_code_for_non-Latin_alphabets</a>
<br>
<a href="https://www.omniglot.com/writing/morsecode.htm">omniglot.com/writing/morsecode.htm</a>