Tap trainer + guide
Morse Code Tapping
Tap Morse code on a table, a wall, a pipe or your phone screen. This page explains the tapping conventions, shows you how to tap SOS, and includes a live tap trainer that decodes what you tap. It also clears up the difference between Morse and the prisoners' "tap code".
Tap the pad (or hold Space). Short tap = dot, long press = dash.
The trainer measures how long you hold: under the "dot limit" is a dot, longer is a dash. Pause briefly to end a letter, pause longer to add a word space. Works with a finger, a mouse or the space bar.
How to tap Morse code
Morse was designed for a telegraph key, which can hold a signal for as long as you like. A knuckle on a table cannot: every knock is the same length. So tapping Morse needs a convention for telling a dash from a dot, and there are three in common use. Agree on one with whoever is listening before you start.
- Tap and hold (best on phones and keys). A quick tap is a dot; pressing and holding for about three times as long is a dash. This is exactly how a telegraph key works and how the trainer above works. On a phone screen or a touchpad it is the natural choice.
- Soft and hard (best on walls and tables). A light tap is a dot; a hard knock is a dash. Simple and fast, but it depends on the listener hearing the difference, which fails through a thick wall.
- Single and double (most reliable through walls). One tap is a dot; two taps in very quick succession are a dash. Slower, but unambiguous, because the listener only has to count.
With any convention, the pauses do the rest of the work. Leave a short pause between letters (about the length of a dash) and a long pause between words (more than twice that). Beginners almost always rush the letter gaps, which turns E E into I; exaggerate them.
Timing
Hand tapping is slow, and that is fine. A realistic speed is 5 to 8 words per minute, with a dot around 150–250 milliseconds. The trainer's "dot limit" slider sets where it draws the line between dot and dash; if your dots keep coming out as dashes, raise it.
SOS as a timing strip: three short, three long, three short, with one-unit gaps in between. Sent as one pattern without letter gaps.
How to tap SOS in Morse code
SOS is ...---...: three dots, three dashes, three dots, sent as one run. With the tap-and-hold convention that is three quick taps, three long presses, three quick taps. With soft-and-hard it is three light taps, three hard knocks, three light taps. With single-and-double it is three taps, three double-taps, three taps. Then wait and repeat.
The steps in order:
- Agree on the convention
A quick tap is a dot. A dash is a longer press, a harder knock, or two taps close together. Whoever is listening needs to know which.
- Three quick taps
That is the letter S (···). Keep them evenly spaced.
- A short pause, then three long signals
Pause about as long as one dash, then make three long presses or three hard knocks: the letter O (–––).
- A short pause, then three quick taps again
S again. The whole thing is ··· ––– ···.
- Wait, then repeat
Leave a clear pause (a word gap) and send it again. Keep repeating until you get a response.
Reference
The Morse code alphabet for tapping
Same alphabet as always. Tap a tile to hear the rhythm you are trying to reproduce; the number of taps per letter is one to four, and digits are five.
Morse code vs the Tap Code: they are not the same thing
If you have read about prisoners of war "tapping Morse code" on cell walls, they were usually using something else: the Tap Code, based on a 5×5 grid called the Polybius square. The Tap Code was used extensively by American POWs in North Vietnam in the 1960s and 70s, including by men who also knew Morse. They chose it because every tap is identical, so it needs no dot/dash convention and works through any wall with a knuckle, a cup or a cough.
Each letter is sent as two groups of taps: first the row, then (after a pause) the column. C and K share a square, so the alphabet fits in 25 cells. A is 1-1 (tap, pause, tap). S is 4-3. So "SOS" in Tap Code is 4-3, 3-4, 4-3. It is slower than Morse, but it is almost impossible to get wrong.
| 1 | 2 | 3 | 4 | 5 | |
|---|---|---|---|---|---|
| 1 | A1·1 | B1·2 | C/K1·3 | D1·4 | E1·5 |
| 2 | F2·1 | G2·2 | H2·3 | I2·4 | J2·5 |
| 3 | L3·1 | M3·2 | N3·3 | O3·4 | P3·5 |
| 4 | Q4·1 | R4·2 | S4·3 | T4·4 | U4·5 |
| 5 | V5·1 | W5·2 | X5·3 | Y5·4 | Z5·5 |
The practical difference: Morse is faster and universal (it works by sound, light and radio too) but needs a dash convention when tapped; the Tap Code is slower and only for tapping, but needs no convention at all. For a quick emergency signal, Morse SOS wins because far more people recognize it.
Tapping Morse code on a phone
Your phone screen is a better telegraph key than a table because it can measure how long you hold. The trainer on this page works on any phone. For actual typing, Google's Gboard keyboard has a Morse layout with a dot key and a dash key, originally built for people who type with switches. If you want to send a tapped message to a friend, tap it out on the trainer, press Copy, and paste the decoded text and the dots and dashes into any chat app. To decode something someone tapped to you, write down the pattern and paste it into the decoder.
"I hear Morse code tapping in my ear"
People sometimes search for this after noticing a rhythmic clicking or tapping sound in one ear. That is not Morse code; it is a recognized symptom often described as "ear clicking", commonly caused by small muscle spasms in the middle ear or by Eustachian tube issues, and it is worth mentioning to a doctor if it persists. If you want to know whether a real sound is Morse, record it and compare it with the rhythms on this page: Morse has clear long and short elements and regular gaps.
FAQ
Frequently asked questions
How do you tap Morse code?
Use short taps for dots and either a longer press, a harder knock or a quick double tap for dashes, depending on the convention you agree on. Leave a short pause between letters and a longer pause between words. The tap trainer on this page uses press duration: under about 150 ms is a dot, longer is a dash.
How do you tap SOS in Morse code?
Three quick taps, three long presses (or hard knocks), three quick taps, with no pauses between the three groups. Wait a few seconds and repeat. Sent as sound, light or taps, ··· ––– ··· is recognized worldwide.
Is tapping on a wall Morse code or tap code?
It can be either. Morse needs a way to tell dashes from dots (duration, force or double taps). The Tap Code used by prisoners of war uses identical taps in a 5×5 grid: a letter is sent as a count of taps for the row, a pause, then a count for the column.
What is the Morse code "tap" crossword answer?
Crossword clues like "Morse code tap" or "Morse code unit" are usually looking for DOT or DIT (three letters), or DASH or DAH for the long signal.
How do you tap "I love you" in Morse code?
I LOVE YOU is ·· / ·–·· ––– ···– · / –·–– ––– ··– . Tap it letter by letter: I (two quick), then after a pause L (quick, long, quick, quick), O (long, long, long), V (quick, quick, quick, long), E (quick), then Y, O, U. The "I love you" page has the audio.
Is there a Morse code tapping translator?
Yes, the trainer at the top of this page: tap on the pad or hold the space bar and it decodes the dots and dashes to text live. To translate text into taps, type it into the Morse translator and tap along with the audio.
Hear what you are trying to tap
Type any word into the audio translator, slow it to 8 WPM and tap along.