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Morse code translator

Encode text to ITU Morse, decode dots and dashes back to letters, play the tone. SOS is three dits, three dahs, three dits. The phone app can also flash the torch and read another light with the camera — this page does not, because your laptop has neither.

§ 01

The translator

International Morse maps every letter and digit to dits (·) and dahs (−). A dit is one time unit; a dah is three. Inside a letter the gap is one unit; between letters, three; between words, seven (shown here as /). That timing is the PARIS standard — the same one search-and-rescue and amateur radio still use.

Live · ITU Morse

ITU timing (PARIS)

Dit (·)

1 unit

Dah (−)

3 units

Gap inside a letter

1 unit

Gap between letters

3 units

Gap between words

7 units

Alphabet

A·−
B−···
C−·−·
D−··
E·
F··−·
G−−·
H····
I··
J·−−−
K−·−
L·−··
M−−
N−·
O−−−
P·−−·
Q−−·−
R·−·
S···
T
U··−
V···−
W·−−
X−··−
Y−·−−
Z−−··
0−−−−−
1·−−−−
2··−−−
3···−−
4····−
5·····
6−····
7−−···
8−−−··
9−−−−·

Distress is SOS, not “HELP” and not a novel acronym. In Morse that is ··· −−− ···. Repeating it is more useful than composing a sentence nobody will decode under rotor noise. Three whistle blasts and three fires in a triangle are the same idea in other channels.

§ 02

What the phone still does better

The Last Manual’s Morse Encoder can flash the rear torch at field speed so two phones can talk without radio. The Morse Decoder uses the camera to read those blinks. Neither belongs in a desktop tab: this site’s Content-Security-Policy and Permissions-Policy do not grant camera, and a browser flashlight does not exist. Install the app for those.

§ 03

Further in the library — titles only

7 titles · 127 articles in this cluster · full text in-app

  1. 01Morse Code SOS: Lights, Flags, and Universal Distress Communication
  2. 02Signal Mirrors: Techniques, Aiming, and Safety Warnings
  3. 03Visual vs. Audio Signals: Choosing the Right Method in Any Situation
  4. 04Building the Perfect Signal Fire: Patterns, Materials, and Safety
  5. 05Survival Radios: Maximizing Range and Battery Life in the Field
  6. 06Signal for Help: The Role of Communication in Your Survival Pattern
  7. 07How Pilots Acknowledge Ground Signals During Rescue Operations

Titles only. Full text, regional variants, and tables are in the offline library — they are not published on this site.

Then get it on the phone

You’re reading this with a signal. The situation it describes is one where you won’t have one.