Just type letters, numbers and punctuation into the top box and the Morse code will appear in the bottom box, with a "#" inserted if the character cannot be translated.
You can type American Morse code into the top box using "." for a dot and "-" or "_" for a dash. The long-dash for an "L" is Unicode U+2E3A ("⸺") and the even longer dash for a zero is Unicode U+2E3B ("⸻"). Use a single space within a letter (such as a "C" which is ".. ."). Letters are separated by three spaces and words by "/". The plain text translation will appear in the bottom box. If a letter cannot be translated a "#" will appear in the output.
The "Play", "Pause", "Stop" and "Repeat" buttons control the playback. You can choose between hearing the sound, seeing a flashing light, or having your phone vibrate using the "Sound", "Light" and "Vibrate" buttons. The vibrate option may only appear on a phone. The "Configure" button reveals advanced options to control the frequency and speed and switch between telegraph and radio sound styles. The flashing light and download buttons do not currently work when in "Telegraph" mode.
This tool works in most browsers: please see the FAQ if you are having problems.
Right now the flashing light only works properly for "CW Radio Tone" and the download also only creates the CW tone, not the Morse sounder.