Morse Beacon: Tactical SOS Transmitter

Turn your device into a Morse transmission station. Use flash and screen as emergency light signals and tactical communication.

STANDBY
0/100
Utilities Studio

Want this utility on your website?

Customize colors and dark mode for WordPress, Notion or your own site.

Frequently Asked Questions

What is the SOS distress signal in Morse code?

The signal is '... --- ...' (three dots, three dashes, three dots). It is transmitted continuously without spaces between the letters to indicate an immediate emergency.

Why is the torch not working in my browser?

Activating the torch requires the browser to have camera permissions. Some mobile browsers or older desktop versions do not support this API for privacy reasons.

Is the SOS screen signal visible?

Yes, in conditions of total darkness, the maximum brightness of a white screen flashing in Morse can be seen from several hundred metres away, making it a useful alternative if the torch fails.

What is the international Morse code?

It is a communication system that uses sequences of short (dots) and long (dashes) signals to represent letters and numbers, standardised by the ITU for radio communications and optical signals.

# The Language of Light

This tool turns your device into an optical signalling beacon capable of transmitting messages visible from kilometres away. Using the international Morse Code standard, it enables silent or emergency communication via light pulses (torch and screen).

A Universal Standard

Developed in 1830 by Samuel Morse, this binary system of dots and dashes revolutionised telecommunications. Its simplicity makes it extremely robust: it can be transmitted by sound, radio, electricity or light, and remains readable even under severe interference.

SOS Emergency Mode

The 'SOS Loop' button continuously transmits the sequence ··· --- ···. This signal is universally recognised as a distress call and, thanks to the high contrast of the LED torch, is visible from a great distance even in daylight under certain conditions.

# ITU-R M.1677-1 Standard

This tool strictly respects the regulatory timings of the international Morse code as defined by the International Telecommunication Union.
  • 1 dot = 1 time unit
  • 1 dash = 3 time units
  • Space between elements = 1 unit
  • Space between letters = 3 units
  • Space between words = 7 units
Standard speed
The default speed is 15 WPM (words per minute), which corresponds to a professional transmission pace. At 15 WPM, 1 unit = 80 ms.

Bibliographic References