Free Morse Code Translator

Morse Code Reference Chart

Click any cell to copy its Morse sequence to your clipboard.

What Is Morse Code?

Morse code is a method of encoding text as a sequence of short and long signals — dots and dashes — that can be transmitted by sound, light, radio or electrical pulses. It was developed in the 1830s and 1840s for the electric telegraph, and remained the standard for maritime and aviation communication well into the twentieth century.

Each letter, digit and punctuation mark has its own unique pattern. E — the most common letter in English — is the shortest code: a single dot. T, the second most common, is a single dash. This is not a coincidence. Samuel Morse and Alfred Vail designed the code so that the most frequent letters had the shortest sequences, making transmissions faster and cheaper.

Timing rules

Morse code is not just about dots and dashes — the gaps between them carry meaning. The standard timing, measured in "units" where a dot is 1 unit:

Written notation

When Morse is written rather than transmitted, three conventions are used:

• Dots and dashes with spaces: .... . .-.. .-.. --- for "HELLO". Letters separated by a space, words by a slash.
• Dits and dahs: Pronounced aloud as dit and dah. Some operators write di-dah-dit instead of .-.
• Continuous dots and dashes: ..../. .-.. style, though less common because it's harder to read.

This tool uses the first convention — the international standard for written Morse.

Worked example: "SOS"

Why SOS?

The famous distress signal SOS (... --- ...) was adopted internationally in 1905 — not because it stands for "Save Our Souls" or "Save Our Ship" (it doesn't), but because the pattern is:

• Simple — three dots, three dashes, three dots.
• Unmistakable — easy to distinguish from any other signal, even through static.
• Symmetrical — the dot group, dash group and dot group are clear when received backwards.
• Fast — sends in nine symbols.

The two trees of Morse

A memorable way to learn Morse is the binary tree: place a dot at each left branch and a dash at each right branch, and the tree spells out the entire alphabet. The most common letters sit at the top (E = dot, T = dash, I = dot-dot, A = dot-dash, etc.), and less common letters sit deeper.

There's also a "Morse tree" for digits: every digit is five symbols long, and the tree for numbers is a simple grid of 10 leaves.

Common use cases

Morse code vs binary vs Braille

People sometimes confuse these three systems, but they're very different:

• Morse code — variable-length sequences of dots and dashes for real-time transmission over sound or light.
• Binary — fixed-length sequences of 0s and 1s for digital systems. A is 01000001 in ASCII, but .- in Morse.
• Braille — a 2×3 grid of raised or flat dots for tactile reading by touch. Each cell encodes one character, with no timing.

Only Morse has timing as part of the encoding. That's what makes it uniquely suited to sound and light.

Is Morse code still used?

Less than it once was, but not dead. Amateur radio operators still use it on shortwave bands, aviation uses it for VOR and ILS navigation beacons (identified by three-letter Morse callsigns), and it remains a backup for some military and emergency communication. In 2003 the ITU added an @ symbol (.--.-.) to the standard so email addresses could be transmitted. The 2020 film Tenet brought Morse back into pop culture.

Privacy and security

This Morse code translator runs entirely in your browser. Your text is never sent to a server, never stored, and disappears the moment you close the tab. Audio playback uses the Web Audio API — no files are uploaded or downloaded. Safe for private messages, puzzles and classroom activities.

Frequently Asked Questions

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