Screen as a Signal Lamp
Your display becomes the transmitter: short flash = dot, longer flash = dash, timed gaps between letters and words. Useful when audio would disturb others or when you need line-of-sight practice.
Free Morse code flasher — type a message, watch the light blink, or go fullscreen for black/white screen signalling. Adjust WPM and play SOS. No signup.
Type a message — watch the Morse code flasher blink, or open fullscreen for a full-viewport black/white signal.
Fullscreen uses the Fullscreen API for a full-viewport black/white blink — best for signalling across a room. Tap or press Esc to exit.
A visual Morse tool that blinks light on a dark panel — or the whole screen — instead of playing a tone.
Your display becomes the transmitter: short flash = dot, longer flash = dash, timed gaps between letters and words. Useful when audio would disturb others or when you need line-of-sight practice.
Type English and the Morse string updates instantly. Copy it for notes, or press Play flash to watch the amber/white lamp on the dark stage.
Fullscreen flash fills the viewport with black and white blinks — higher contrast than a small lamp, intended for room-scale visual Morse (training and educational signalling).
Four steps from typed message to visible signal.
Enter letters and numbers in the Text panel. Morse preview updates live with spaced letter groups and / between words.
Start slower (around 8–12 WPM) so flashes are readable by eye. Raise speed once letter timing feels natural.
Press Play flash to blink the high-contrast lamp. The current character label updates as each letter group is sent.
Press Fullscreen flash for a full-viewport black/white blink. Tap the screen or press Esc to exit when finished.
Honest limits: browsers almost never get the iOS torch; screen flash works everywhere this page loads.
Uses the display pixels — the dark stage lamp or fullscreen black/white overlay. No special hardware permission. Works on desktop and mobile browsers that support the Fullscreen API (or still blinks in-page if fullscreen is blocked).
Hardware LEDs are brighter outdoors, but web pages generally cannot control the iOS torch, and Android access (when available) is inconsistent and permission-heavy. Do not expect a website to replace a dedicated torch app.
For indoor practice and classroom demos, maximise screen brightness and use fullscreen. For outdoor signalling, a real torch or radio is far more effective than any browser page.
The same International Morse unit timing as audio — eyes need clearer gaps than ears.
A dot is 1 unit of light on. A dash is 3 units of light on. The gap inside a letter (between symbols) is 1 unit of darkness.
Between letters ≈ 3 units dark. Between words ≈ 7 units dark. Written Morse uses a space between letters and / between words — the flasher follows that structure.
Visual Morse is harder at high speed. Prefer slower WPM than you would use for headphone practice until the rhythm is solid. The slider scales every unit length.
Fullscreen black/white maximises contrast. Dim rooms help; sunny outdoor viewing of a phone screen does not. Turn brightness up before you start.
Three dots, three dashes, three dots — the international distress rhythm people recognise by sight.
... --- ... is S, O, S as three letter groups. Use Play SOS to flash that pattern without typing.
Short–short–short, long–long–long, short–short–short. Keep normal letter spacing — do not run nine symbols into one unbroken block.
History, timing, and audio practice live on the dedicated SOS Morse code page.
Educational signalling practice only — this page does not replace real emergency services.
Learn a few letters by eye first (E, T, S, O, A). Flash short words, then phrases. Have a partner read the lamp while you adjust WPM. Copy Morse afterward to check what you actually sent.
In a real emergency, contact local emergency services with the tools available to you (phone, radio, official distress channels). A browser Morse flasher is for learning and demonstration — not a substitute for 999/911 or maritime/aviation distress systems.
Need a letter chart while practising? Open the Morse code alphabet or the full converter.
Same International Morse — different output channel and search intent.
Optimised for visual blink: lamp stage, fullscreen black/white, Play SOS, current-character readout. Best when you searched for a Morse code flasher or light signal tool.
The Morse audio generator emphasises tone playback (WPM + Hz). Use it when you need ear training more than a bright screen.
The home Morse translator covers two-way text↔Morse plus audio and light together. Use decoder or text to Morse for encode/decode-first jobs.
Answers for screen-flash and light-signal searches.
... --- ... — three short flashes, three long, three short. Press Play SOS to flash that pattern. See also the SOS Morse code page.Return to the tool — type, play the lamp, or open fullscreen black/white signalling.
Use the flasher