Morse Code Translator
Morse code is a character encoding system that represents letters, numbers, and punctuation as sequences of dots (·) and dashes (−). Paste text or Morse code below to translate in either direction.
Examples
International Morse Code Reference Chart
The International Morse Code standard assigns a unique dot-dash pattern to each letter, digit, and common punctuation mark. Shorter codes are assigned to more frequently used letters.
Letters
| Character | Morse Code | Character | Morse Code |
|---|---|---|---|
| A | ·− | N | −· |
| B | −··· | O | −−− |
| C | −·−· | P | ·−−· |
| D | −·· | Q | −−·− |
| E | · | R | ·−· |
| F | ··−· | S | ··· |
| G | −−· | T | − |
| H | ···· | U | ··− |
| I | ·· | V | ···− |
| J | ·−−− | W | ·−− |
| K | −·− | X | −··− |
| L | ·−·· | Y | −·−− |
| M | −− | Z | −−·· |
Numbers
| Digit | Morse Code | Digit | Morse Code |
|---|---|---|---|
| 0 | −−−−− | 5 | ····· |
| 1 | ·−−−− | 6 | −···· |
| 2 | ··−−− | 7 | −−··· |
| 3 | ···−− | 8 | −−−·· |
| 4 | ····− | 9 | −−−−· |
Punctuation
| Symbol | Morse Code | Symbol | Morse Code |
|---|---|---|---|
| . | ·−·−·− | ! | −·−·−− |
| , | −−··−− | / | −··−· |
| ? | ··−−·· | ( | −·−−· |
| ' | ·−−−−· | ) | −·−−·− |
| : | −−−··· | & | ·−··· |
| ; | −·−·−· | @ | ·−−·−· |
| " | ·−··−· | − | −····− |
Morse Code Timing Rules
Morse code has precise timing rules that determine how fast and clearly a message is transmitted. All durations are measured relative to the length of one dot.
| Element | Duration | Example |
|---|---|---|
| Dot (·) | 1 unit | Short signal |
| Dash (−) | 3 units | Long signal (3× a dot) |
| Intra-character gap | 1 unit | Silence between dots/dashes within one letter |
| Inter-character gap | 3 units | Silence between letters (written as one space) |
| Word gap | 7 units | Silence between words (written as / or three spaces) |
At 20 WPM (words per minute), one dot unit is 60 milliseconds. Speed is measured using the word "PARIS" as the standard reference — it contains exactly 50 dot units, so at 20 WPM, 20 × 50 = 1000 units per minute, or 60 ms per unit.
How Morse Code Works
- Character mapping: Each letter, digit, and punctuation mark has a unique dot-dash sequence defined by the International Morse Code standard (ITU-R M.1677).
- Frequency-based code lengths: Common letters get shorter codes. E (most common in English) is a single dot. T is a single dash. Less frequent letters like Q and Z have four-symbol codes.
- Spacing encodes structure: The pauses between elements carry as much information as the signals themselves. Without correct spacing, dots and dashes blur into ambiguous sequences.
- Medium-independent: Morse code can be transmitted via sound (tones, tapping), light (flashing), electrical pulses (telegraph), radio waves (CW), or physical motion (blinking). The encoding is the same regardless of medium.
Common Mistakes When Writing Morse Code
- Missing letter spacing: Writing
......---...instead of... --- .... Without spaces between letters, the receiver cannot tell where one character ends and the next begins. - Confusing word gaps and letter gaps: A single space separates letters. Three spaces (or a
/) separates words. Using the same gap for both makes the message unreadable. - Inconsistent dot/dash lengths: When tapping or flashing Morse code, making dots and dashes too similar in length causes decoding errors. Dashes should be noticeably longer — exactly 3× a dot.
- Mixing up similar characters: D (−··) vs. B (−···), U (··−) vs. V (···−), and G (−−·) vs. W (·−−) are commonly confused. Practice these pairs together.
Frequently Asked Questions
What is Morse code?
Morse code is a character encoding system that represents letters, numbers, and punctuation as sequences of short signals (dots, ·) and long signals (dashes, −). Developed in the 1830s–1840s by Samuel Morse and Alfred Vail for use with the telegraph, it was the first practical method of long-distance electrical communication.
How do you read Morse code?
Each character is a unique combination of dots and dashes. Read each group of symbols, match it to the reference chart, and write down the corresponding letter or number. Letters within a word are separated by a short gap (one space). Words are separated by a longer gap (three spaces or a /).
What is SOS in Morse code?
SOS is ··· −−− ··· (three dots, three dashes, three dots). Adopted as the international distress signal in 1906, it was chosen because the pattern is simple to transmit and unmistakable to receive. Contrary to popular belief, SOS does not stand for "Save Our Souls" — it was selected purely for its distinctive rhythm.
Is Morse code still used today?
Yes. Aviation navigational beacons (NDBs and VORs) still transmit their identifiers in Morse code. Amateur (ham) radio operators use it extensively — CW (continuous wave) mode remains one of the most reliable long-distance communication methods. It is also used in accessibility technology, emergency signaling, and military applications.
How long does it take to learn Morse code?
The full alphabet can be memorized in 2–4 weeks with 15–30 minutes of daily practice. Reaching a comfortable receiving speed of 15–20 WPM typically takes 2–6 months. The most effective learning methods are the Koch method (learn at full speed, adding two characters at a time) and the Farnsworth method (full-speed characters with extended pauses between them).
Why are some letters shorter than others?
Morse and Vail assigned shorter codes to letters that appear more frequently in English. E (the most common letter) is a single dot. T is a single dash. Rare letters like Q (−−·−) and J (·−−−) have four symbols. This is the same principle behind Huffman coding in computer science — shorter codes for common symbols minimize total transmission time.
What is the difference between a dot and a dash?
A dot (also called "dit") is a short signal lasting one time unit. A dash (also called "dah") is a long signal lasting exactly three time units. The 1:3 ratio is critical — at 20 WPM, a dot lasts 60 ms and a dash lasts 180 ms.
Can Morse code be transmitted with light?
Yes. Any medium that can produce two distinguishable states — on and off, short and long — can carry Morse code. Flashlights, signal lamps, ship lights, and even phone screens can transmit Morse. The same timing rules apply regardless of medium.
How do you separate words in Morse code?
Words are separated by a pause equal to seven dot durations. In written Morse code, this is typically shown as three spaces or a forward slash (/). Letters within a word are separated by three dot durations (one space in written form).
Does this tool store my input?
No. All conversion and audio playback happens entirely in your browser using JavaScript and the Web Audio API. No text is sent to any server. You can verify this by disconnecting from the internet — the tool continues to work.
Related Tools
- Binary Text Decoder — convert between binary and text
- Text to Binary — encode text as binary digits
- Base64 Encoder/Decoder — encode and decode Base64 strings
- ROT13 Decoder — decode ROT13 cipher text
- Unicode Codepoint Decoder — inspect Unicode characters and codepoints
Privacy & Limitations
- Client-side only. No data is sent to any server. No cookies, no tracking of text entered.
- International Morse Code only. This tool uses the ITU International Morse Code standard. It does not support American Morse Code (used on early US landline telegraphs) or Japanese Morse Code (Wabun Code).
- Latin characters only. Characters outside the standard Morse code set (Chinese, Arabic, Cyrillic, etc.) are skipped during conversion.
- Audio requires Web Audio API. Playback works in all modern browsers. Older browsers without Web Audio API support will not produce sound.
Related Tools
View all toolsBig-O Notation Visualizer
Interactive plot of O(1) through O(n!) complexity curves with operation count comparison
JSON Formatter
Format and beautify JSON with proper indentation
JSON Validator
Validate JSON syntax and show errors
CSV to JSON Converter
Convert CSV data to JSON format with auto-detection
JSON to CSV Converter
Convert JSON arrays to CSV format with nested object handling
JWT Decoder
Decode JWT tokens and display header and payload
Morse Code Decoder FAQ
What is Morse code?
Morse code is a character encoding system that represents letters, numbers, and punctuation as sequences of short signals (dots) and long signals (dashes). It was developed in the 1830s–1840s by Samuel Morse and Alfred Vail for use with the telegraph. Each character has a unique dot-dash pattern — for example, 'A' is '·−' and 'S' is '···'.
How do you read Morse code?
Each letter is represented by a unique combination of dots (·) and dashes (−). A dot is a short signal, and a dash is three times the length of a dot. Letters within a word are separated by a short pause (one space), and words are separated by a longer pause (three spaces or a slash /). You decode each group of dots and dashes back to its corresponding character.
What is SOS in Morse code?
SOS in Morse code is ··· −−− ··· (three dots, three dashes, three dots). It was adopted as the international distress signal in 1906 because the pattern is easy to transmit and recognize. It does not stand for any specific words — it was chosen purely for its simplicity.
Is Morse code still used today?
Yes, though less than in the past. Morse code is still used in aviation (navigational beacons transmit identifiers in Morse), amateur (ham) radio, accessibility tools for people with limited mobility, and emergency signaling. The US Navy retired its last Morse code station in 1999, but ham radio operators worldwide continue to use it daily.
How long does it take to learn Morse code?
Most people can learn the full alphabet in 2–4 weeks with daily practice of 15–30 minutes. Reaching a comfortable receiving speed of 15–20 words per minute typically takes 2–6 months. The Koch method (learning at full speed, two characters at a time) and the Farnsworth method (full-speed characters with extended spacing) are the most effective learning approaches.
What is the difference between a dot and a dash in Morse code?
A dot (·, also called 'dit') is a short signal. A dash (−, also called 'dah') is a long signal exactly three times the duration of a dot. The pause between dots and dashes within a letter equals one dot duration. The pause between letters is three dot durations, and the pause between words is seven dot durations.
Can Morse code be sent with light or sound?
Yes. Morse code can be transmitted through any medium that allows two distinguishable signal states: electrical pulses over wire (telegraph), radio waves (CW transmission), light flashes (signal lamps, flashlights), sound (tones, whistles, tapping), and even physical movement (blinking). The code itself is medium-independent.
What does this Morse code translator do?
This tool converts text to Morse code and Morse code back to text. It supports the full International Morse Code standard including all 26 letters, digits 0–9, and common punctuation. It also provides audio playback of the Morse output. All processing happens in your browser — no data is sent to any server.
Why are some letters shorter than others in Morse code?
Samuel Morse and Alfred Vail assigned shorter codes to more frequently used letters in English. 'E' (the most common letter) is a single dot, while 'Q' (rarely used) is −−·−. This is the same principle behind Huffman coding in computer science — shorter codes for common symbols minimize average transmission time.
How do you separate letters and words in Morse code?
Letters are separated by a short pause equal to three dot durations (written as a single space). Words are separated by a longer pause equal to seven dot durations (written as three spaces or a forward slash /). In text form, dots and dashes within a single character have no space between them.