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About this tool
Convert text to Morse code, listen to audible signals with customizable pitch, speed, and volume, and follow real-time visual highlight tracking.
Morse Code Audio converts typed text into International Morse and plays it as a real tone, using the standard PARIS timing where one dot lasts 1.2 ÷ WPM seconds, a dash is three dots, and the gaps run 1 unit inside a letter, 3 between letters and 7 between words. Speed is adjustable from 5 to 40 words per minute, pitch from 300 Hz to 1 kHz, and the character and symbol currently sounding are highlighted as it plays. It is for someone learning to hear Morse rather than read it — the sound, the spacing and the written symbols lined up on one screen.
Open Morse Code Audio on AltFTool — it loads instantly in your browser.
Type up to 500 characters into Enter English Text — letters, digits and basic punctuation are supported.
Open Playback Settings to set Speed (WPM) anywhere from 5 to 40 and Pitch (Hz) from 300 to 1000, then press Listen.
Follow Morse Code Output & Playback Highlights as the active character and its dot or dash light up, and press Stop to end playback.
Element lengths follow the accepted 1:3 dot-to-dash ratio with 1, 3 and 7 unit gaps, so what you hear matches what a real operator sends.
The active character and the exact dot or dash being sounded are highlighted as playback moves, which is how the mapping between sound and letter sticks.
Pitch and volume are separate controls, so you can pick the frequency you hear most clearly instead of accepting one fixed beep.
One dot lasts 80 milliseconds at 15 WPM, since the dot length is 1.2 ÷ WPM seconds under the standard PARIS convention. A dash is three times that at 240 ms, and the gap between two words is seven dot lengths, or 560 ms.
The 26 letters A–Z, the digits 0–9, and 18 punctuation and symbol characters including full stop, comma, question mark, slash, brackets, colon, semicolon, equals, plus, hyphen, underscore, quotation marks, dollar and at-sign. Letters are case-insensitive, and a space between words is written as a forward slash in the Morse output.
Anywhere in the 300 Hz to 1000 Hz range the tool offers; 600 Hz is the default and sits close to the 600–800 Hz sidetone most amateur radio operators train with. Choose whatever frequency you can pick out most easily against background noise — it does not affect timing.
Because Morse is defined by ratio, not by absolute duration. A dash is three units, the silence inside a letter is one unit, between letters three, and between words seven — get those proportions wrong and a receiving operator hears different letters, no matter how neat the individual beeps sound.