How the translation is written
In the Morse output, a dot is a short signal and a dash a long one. Letters are separated by a space and words by a slash, so SOS HELP becomes ... −−− ... / .... . .−.. .−−. Line breaks are kept. When you paste Morse code, the translator also accepts the middle dot, the bullet and the underscore, and treats a slash, a vertical bar or three spaces as a word gap. Codes it does not know are shown as an asterisk and listed above the result.
The International Morse code covers the letters A to Z, the digits and the usual punctuation. Letters such as Ä, Ç, É, Ñ, Ö or Ü use widely known national extensions; some of them share a code, for example Ä and Æ. Accented letters without their own code are sent without the accent (á becomes A, ß becomes SS) and the tool tells you which characters it changed. Characters with no Morse equivalent, like emoji, are skipped and listed.
Speed, WPM and Farnsworth
Morse speed is measured in words per minute (WPM) using the word PARIS as the standard: at 20 WPM one dot lasts 60 milliseconds, a dash three times as long, the gap between letters three dots and between words seven. Beginners often learn with Farnsworth spacing: each letter is played at a higher speed so it keeps its typical rhythm, while the pauses between letters and words are stretched to a slower overall speed. Tick Farnsworth spacing and choose the effective speed.
The tone can be set between 300 and 1200 Hz; most operators like something between 500 and 800 Hz. The small light blinks with the signal and the current letter is highlighted, which helps when you learn to read code by ear and by eye. The light is kept small on purpose, because large flashing areas can be unpleasant or harmful for people sensitive to flashing light.