How to Translate Morse Code Free — Text & Audio (2026)

You can translate text to Morse code and back using brevio Morse Code Translator — translation and audio playback run entirely in your browser using the Web Audio API. No data is sent anywhere.

What Is Morse Code?

Morse code is a character encoding system that represents letters and numbers as sequences of two signals: a short signal called a dot (·) and a long signal called a dash (—). The system was developed by Samuel Morse and Alfred Vail in the 1830s and 1840s for use with the electric telegraph.

History of Morse Code

Samuel Morse and his assistant Alfred Vail built the first working telegraph line in 1844, connecting Washington D.C. to Baltimore. The first message sent was “What hath God wrought.” The original American Morse Code was later standardised as International Morse Code by a conference in Berlin in 1851, which is the version in use today.

Morse code became the primary communication system for maritime and aviation distress signals. The ITU formally adopted SOS as the international distress signal in 1906 — chosen because its Morse representation (... --- ...) is simple and unambiguous, not because it is an acronym (though “Save Our Souls” became the popular backronym).

How Morse Code Works

Each letter is encoded as a sequence of dots and dashes. A dot is one unit of time; a dash is three units. The space between signals within a character is one unit. The space between letters is three units. The space between words is seven units. This timing relationship gives Morse its rhythm and makes it learnable with practice.

Common letters have short codes (E = ., T = -, I = ..) while rare letters have longer codes (J = .---, Q = --.-), making the system efficient for typical English text.

The SOS Signal

SOS in Morse code is ... --- ... — three dots, three dashes, three dots. It was designed to be distinctive, easy to transmit under stress, and hard to confuse with other signals. In audio form it sounds like: dit dit dit dah dah dah dit dit dit. International maritime law still recognises Morse SOS as a distress signal, though modern vessels primarily use EPIRB (Emergency Position Indicating Radio Beacon) and DSC radio.

Morse Code Today

• Amateur radio (ham radio). The ITU removed the Morse code requirement for amateur radio licences in 2003, but many operators still learn and use it. Morse is effective at low signal strengths where voice communication fails.
• Military and special forces. Morse code remains in use in some military contexts as a backup communication method that requires minimal equipment.
• Accessibility. Morse code can be used as an assistive technology input method — users with limited mobility can input text using a single switch.
• Pop culture and puzzles. Morse code appears in escape rooms, ciphers, mystery novels, and films as a communication device.
• Shortwave beacons. Many navigational beacons still transmit their identifier in Morse code on shortwave frequencies.

Learning Morse Code

The recommended approach is to learn Morse by sound, not by memorising dot-dash patterns visually. Start with the five most common letters (E, T, A, I, N) and practice recognising them at a comfortable speed before adding more. The Koch method — learning characters at full speed from the beginning, starting with just two characters — is the most effective technique for building real-world proficiency.

Audio Beeps

The brevio translator generates audio using the Web Audio API, producing sine-wave tones at 600 Hz — the traditional Morse code pitch. Dots are short tones; dashes are three times as long. The tone is synthesised in your browser with no downloads or external resources required.