Light Flash Morse Decoder
Read Morse code sent by light. Aim your camera at a flashing lamp, torch or signaling LED, line it up inside the reticle, and this tool measures the on/off flashes and decodes them into text as they happen.
Set this between the dark and lit brightness so the meter crosses the red marker only when the light flashes inside the reticle.
Detected Morse
…
Decoded text
Aim the reticle at a flashing light to begin…
How it works
Each camera frame is drawn to a small hidden canvas, and the average brightness of the central region (inside the reticle) is measured. When that brightness rises above the threshold the light is treated as “on”; below it, “off”. Timing the flashes separates dots from dashes, and timing the dark gaps separates letters and words — which are then decoded into plain text.
Tips
- Keep the flashing source steady and centered in the reticle.
- Work in dim surroundings so the light stands out, then set the threshold between the dark and lit brightness levels.
- Pair it with this site’s flashlight signaler on another device for a clean end-to-end test.
- Camera frames are processed only on your device and never uploaded.