Learn and practice Morse code with audio playback, speed control, and interactive exercises.
Morse code is a sound before it is a text: every character is a rhythm of short and long tones, and practiced operators copy by ear, never by counting dots and dashes. This trainer plays the code aloud at a speed you set, shows what is being sent, and works you through exercises until the rhythms stick. The surprise nearly every beginner hits is that reading .-. as 'dot-dash-dot' does not transfer to hearing R at speed, because a character is perceived as one beat, not three parts. Keep the speed where whole characters are still recognizable, then push it up gradually.
A concrete input and expected output from the current implementation.
Input
SOS
Expected output
The trainer plays three dits, three dahs, three dits: ... --- ... . At a 20 WPM setting each dit lasts 60 ms, each dah 180 ms, element gaps are 60 ms, and letter gaps 180 ms, for a total run of 1.62 seconds.
Morse speed uses the PARIS convention: the word PARIS spans 50 time units, so one unit lasts 1.2 seconds divided by the WPM setting, or 60 ms at 20 WPM. S occupies 5 units, O occupies 11, and the two letter gaps add 3 units each, totaling 27 units, hence 27 times 60 ms equals 1.62 seconds.
All Morse timing derives from one base unit. A dit is one unit, a dah three, with one-unit gaps between elements inside a character, three-unit gaps between characters, and seven units between words. Raising the WPM shrinks every duration proportionally, so a faster setting compresses the gaps exactly as much as the tones, which is why high speeds sound like continuous runs of rhythm rather than distinct beeps.
Practice means hearing a character and naming it, or typing text and hearing it played back at the current speed. The visible dot-dash answer exists for checking yourself after the fact; reading along while the audio plays trains the eye instead of the ear, so serious copying practice answers from sound alone and consults the transcript only afterward.
There is no single right number. The Koch method starts two characters at your target speed, often 20 WPM, and adds one character per session; Farnsworth-style timing plays characters fast while stretching the gaps between them. Either way, choose a setting where a whole character registers as one beat rather than something you assemble from pieces, and raise it in small steps, 1-2 WPM at a time.
No, but not because the trainer is lacking: since February 2007 the FCC has not tested Morse code for any US amateur license, so no exam requires it. Many hams learn it anyway to work CW, where the code is used on the air daily, and a trainer like this is how most start. For a license, study the written exam; keep Morse for the pleasure of it.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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