Morse Code Generator

How to use

1. 1

   Type or paste your message, open a .txt file, or pick an example. Up to 5,000 characters.

2. 2

   Pick a speed: 5 WPM, Farnsworth 18/10, 13, 20 or 25 WPM. The Speed slider goes from 5 to 40 WPM.

3. 3

   Pick a sound: Radio tone 600 Hz, High tone 800 Hz, Radio static or Telegraph sounder. Press Play to listen.

4. 4

   For a sound effect, open Timing and set Repeat (up to 10 times) and the gap.

5. 5

   Press MP3 or WAV. The file is named after your message and speed, like sos-20wpm.mp3; its length shows beside the buttons.

What it does

This Morse code audio generator turns text into the sound of Morse code and saves it as a file.

• MP3 or WAVMP3 at 128 kbps is small enough to send. WAV is uncompressed 16-bit mono at 44.1 kHz for editing in Audacity or a video editor.
• Three soundsAs a Morse code sound generator it plays a radio tone (a pure sine from 200 to 1200 Hz), the same tone under hissing, fading radio static, or the clicks of a telegraph sounder.
• What you hear is what you saveSpeed, Farnsworth spacing, word spacing, volume and repeats all go into the file.
• A Morse code playerPlay, Pause, Stop, a timer, and a tape that lights each letter as it sounds.
• Morse to soundPaste dots and dashes in Morse to text to hear or save them.
• Copy, share or flash itCopy the dots and dashes, save a text file, or share a link at your speed and tone. Light flashes it; on phones, Vibrate lets you feel it.

It also works with seven other code tables, from Russian to Japanese. To translate both ways, use the Morse code translator.

How it works

Timing follows ITU-R M.1677-1: a dot is one unit, a dash three; gaps are one unit inside a letter, three between letters, seven between words. Speed is counted with PARIS, 50 units with its word gap, so one unit lasts 1200 ÷ WPM milliseconds.

Farnsworth 18/10 plays letters at 18 WPM and stretches the gaps, by the ARRL formula, until the message runs at 10 WPM.

Each Morse code beep is a sine tone that rises and falls over 5 milliseconds (a raised-cosine edge), so it never clicks. Radio static adds band noise around the tone and a slow, uneven fade, so no two files hiss alike. The telegraph sounder has no tone: it clicks sharply as the armature is pulled down and softly as it springs back. A saved file adds a 20 ms lead-in before the signal and a 100 ms tail after it, so no edge is cut off.

Examples

Test messages, and how long each plays at 20 WPM:

The SOS example types <SOS>: the brackets send it as one signal with no letter gaps (more on SOS). Plain SOS gives three letters.

For a film, game or escape room sound effect: pick SOS and Telegraph sounder, then set Repeat to 3 with a 2-second gap. The file runs 8.3 seconds and saves as sos-20wpm-x3.mp3.

Trust and limits