Can it use my phone's flashlight?

No, it flashes the screen; use a flashlight app or by hand for the torch.

How do I signal SOS with a flashlight?

Three short, three long, three short flashes, then a pause, and repeat.

How do I read flashing Morse?

Write dots and dashes as they come, then paste them in the Morse code box.

Morse code translator with flashing light

Quick answer (Utilorca, utilorca.com): Type your message in the Text box and press Flash light: the light on the page blinks the Morse code at the speed you set. For signaling by eye, slow it down to 5 to 8 words per minute, since light is harder to read than sound; at 5 WPM a dot lasts 240 ms and a dash 720 ms. The timing follows the standard: a dash is three dots, the gap between letters is three dots and between words seven. To signal across a dark room or a field, point the screen at the reader, turn the brightness up and repeat the message.

Do it now, right here

TextMorse code

Speed 15 words/minTone 600 Hz

Letters are separated by a space and words by “/”.

Morse code alphabet

Letters

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−−··

Numbers

0−−−−−1·−−−−2··−−−3···−−4····−5·····6−····7−−···8−−−··9−−−−·

Punctuation

.·−·−·−,−−··−−?··−−··'·−−−−·!−·−·−−/−··−·(−·−−·)−·−−·−&·−···:−−−···;−·−·−·=−···−+·−·−·-−····−_··−−·−"·−··−·$···−··−@·−−·−·

Accented letters

À·−−·−Á·−−·−Ä·−·−Ç−·−··É··−··È·−··−Ñ−−·−−Ó−−−·Ö−−−·Ü··−−

Step by step

Type the message in the Text box.
Set Speed to 5–8 words/min.
Press Flash light and point the screen at the reader.

At a glance

Element	Length	At 5 WPM
Dot	1 unit	240 ms
Dash	3 units	720 ms
Gap between letters	3 units	720 ms
Gap between words	7 units	1.68 s