Morse code video maker

1. 1

   Type a message, or tap an example: A to Z, 0 to 9, SOS, HELLO, I LOVE YOU or HAPPY BIRTHDAY.

2. 2

   Pick the shape: Square for posts, Story 9:16 for stories and reels, Wide 16:9 for YouTube and slides.

3. 3

   Pick the colors and the sound: Tone, like a radio, or Telegraph sounder clicks.

4. 4

   Set the speed and the pitch, and play the message once, twice or three times.

5. 5

   Press Play preview to watch it with sound.

6. 6

   Press Record video, then download the MP4 (or WebM), or share it from your phone.

• Watch it first. Play preview plays the video on the page with sound, so the A to Z example is a Morse alphabet video in one tap.

• Three shapes. Square 720 × 720, Story 720 × 1280, Wide 1280 × 720, in five color sets.

• Two sounds. A tone from 300 to 1000 Hz, or the clicks of a telegraph sounder.

• Saved as MP4. Saved as MP4 or WebM, named after your message, or shared straight to an app.

• The sound alone. Download WAV saves the soundtrack.

• Safe to watch. The lamp flashes with each dot and dash at 7 WPM or slower, under three flashes a second. Faster, or if your system asks for reduced motion, it stays lit and shows each letter.

One timing drives the picture and the sound. It follows ITU-R M.1677-1: a dot is one unit, a dash three, with one unit inside a letter, three between letters and seven between words. Speed is counted with the word PARIS, so one unit lasts 1.2 ÷ WPM seconds: about 67 ms at 18 WPM, the maker’s starting speed.

The site’s audio engine schedules the sound, and each frame is drawn from the audio clock, so the lamp lights exactly when the tone sounds. A recording captures the picture at 30 frames a second with the sound through the browser’s MediaRecorder, in real time: a 30-second clip takes 30 seconds to record. Every clip has a second of lead-in before the first dot and 0.8 seconds after the last.

The lamp flashes only at 7 WPM or slower: there the fastest flash, a dot and its gap, takes 343 ms, under the three flashes a second that WCAG 2.3.1 allows. At a faster speed, or if your system asks for reduced motion, the lamp stays lit while the message plays and shows each letter as it is sent, in the preview and the video alike.

In the A to Z and 0 to 9 examples the characters are spaced as words, seven units apart, so each one stands alone in the lamp. A long message is set smaller to leave room for its code, and when the code is longer than the frame holds, its lines scroll to keep the lit letter in view.

Worked out for HELLO: 49 units, so 3.27 seconds at 18 WPM, plus 1 second of lead-in and 0.8 seconds after: 5.1 seconds, as the preview line shows. Played twice, with a word gap between, it runs 8.8 seconds.