Send, receive & learn Morse code.
Turn any phone into a Morse studio — sound, light, vibration and text. 100% offline, no ads, no accounts.
What you can do
One app for every way to send a signal — and to learn the code behind it.
Send
Play any message as clean Morse tones, torch flashes, a screen strobe or vibration.
Receive
Decode Morse from live sound, a blinking light, a photo, or a pasted string.
Learn
A full ITU reference table and a gamified Koch trainer that unlocks letters as you improve.
Share
Export your message as an image, a phone wallpaper, an animated GIF, or a .wav.
Try it right here
Type your name and hear or see it in Morse — no download, nothing leaves your browser.
Photosensitivity note: the Flash button blinks the whole screen. Skip it if you’re sensitive to flashing light.
How it works
Three taps from an idea to a signal.
Type
Write your message — a word, a name, or SOS.
Choose output
Sound, light, vibration or screen strobe — or all at once.
Send
Play it, flash it, or key it out yourself on the tap key.
New to Morse? Start with the alphabet.
A short history, the timing rules, an interactive reference table and a practice quiz — all free.
Learn Morse codeSee it in the app
A quiet interface that stays out of your way, in light and dark.
Private by design
Your audio, camera frames and messages never leave your device. Nothing is recorded or transmitted. No accounts, no ads, no tracking — ever.
Get DotDotDoit
Free. No ads. No accounts. Android now — iOS planned.
A friendly heads-up: DotDotDoit is for fun and learning — don’t rely on it as your only way to signal in an emergency.