Morse Code Text & Audio Beeper Translator
2-way English to Morse Code translator with real-time Web Audio API beep playback, flashlight strobe simulation, and NATO phonetic alphabet mapping.
International Morse Code & Phonetic Reference
About this tool
How to use it
- Type any English sentence, callsign, or numbers in the English Text field to generate the Morse code translation automatically.
- Or type dots (.) and dashes (-) into the Morse Code box with spaces between letters and slashes (/) between words to decode into English.
- Adjust the WPM (Words Per Minute) slider to set audio speed and Tone (Hz) to tune the audio oscillator frequency.
- Click 'Play Morse Audio' to hear the authentic telegraph beeps accompanied by a synchronized flashing signal light.
- Click 'Copy Morse' or 'Copy Text' to copy the results to your clipboard.
Why it matters
Morse code remains an essential emergency transmission standard, amateur radio (ham radio) mode, and historical communication cipher. Learning and verifying Morse code via interactive audio and visual cues reinforces auditory pattern recognition much faster than static charts alone.
When to use it
Use this tool when preparing for amateur radio CW licenses, sending emergency distress signals, practicing Boy Scout / Girl Scout signaling, deciphering escape room codes, or encoding secret messages.
Good to know
Audio playback generates sound synthesized client-side via the browser's native Web Audio API. No external MP3 sound files or network requests are required.
Common questions
What is the standard timing ratio in Morse code?
Under the international standard, a dash is equal to 3 dots in length. The space between elements of the same letter is 1 dot, between letters is 3 dots, and between words is 7 dots.
What does SOS mean in Morse code?
SOS (... --- ...) was selected as the universal maritime distress signal in 1905 because its sequence of three dots, three dashes, and three dots is unmistakable and easy to transmit even under heavy radio interference.
Why does radio operators use CQ?
CQ (-.-. --.-) is the general call used by amateur radio operators to invite any listening station to establish contact ('seek you').
Does audio playback work on mobile devices?
Yes! Web Audio API runs in modern iOS Safari and Android Chrome, requiring a user tap on the 'Play Morse Audio' button to start audio playback.