Morse Code Translator
The Binary Pulse: Bridge the gap between human language and the rhythmic pulse of the telegraph with precision logic.
The Rhythm of Global Communication
Morse code is more than just a historical relic; it is the world's most enduring digital protocol. Invented in the 1830s by Samuel Morse and Alfred Vail, this rhythmic language of dots and dashes revolutionized long-distance communication. The Kodivio Morse Code Translator is a professional utility designed to bridge the gap between human language and the legacy of the telegraph with ITU-standard precision.
Our engine performs bidirectional translation between plaintext and International Morse Code, following the exact timing specifications defined by the ITU-R M.1677-1. Whether you're an amateur radio (CW) operator auditing your keying rhythm, a pilot verifying a VOR beacon identifier, or an educator teaching the fundamentals of signal processing, our tool provides a high-fidelity environment for encoding and decoding Morse signals. It supports the full spectrum of letters, numerals, and procedure signs (prosigns) required for professional radio traffic.
Security and privacy are at the core of our "Zero-Server" mandate. We understand that Morse code is often used in sensitive or emergency scenarios where data sovereignty is critical. By executing the entire translation logic locally in your browser's JavaScript engine, we ensure that your messages never cross the wire. This means Kodivio is the safest choice for secure, private, and high-speed Morse code conversion in 2026.
How to Use the Translator
Enter your text or paste Morse code (. - /) into the translator above.
The tool instantly updates as you type, providing both visual and audio feedback.
Copy the dots and dashes or the decoded text directly to your clipboard.
Pro Tip
Use the Audio Playback feature to learn the "rhythm" of the code. Expert Morse operators never "count" dots and dashes; they learn the distinct musical sound (dits and dahs) of each character.
Common Morse Signals
... --- ...
.-.-.
-...-
For Radio Amateurs
Audit your keying accuracy and practice decoding high-speed CW traffic for licensure exams.
For Pilots
Decode VOR and NDB identifiers to verify your navigation aids during cross-country flight planning.
For Students
Explore the history of telecommunications and the origins of modern binary computing protocols.
The Rhythm of Telegraphy
Invented by Samuel Morse and Alfred Vail in the 1830s, Morse code is the arguably the world's first digital protocol. It encodes text as a series of on-off pulses, standardized as short marks (DOTs) and long marks (DASHes).
Our 2026 engine follows the International Morse Code standard. We go beyond mere substitution; our logic respects the fundamental timing ratio where a DASH is exactly three times the duration of a DOT, and character spacing is mapped to ensure machine-decodable accuracy.
Encoding Standards
The global standard used for amateur radio (CW) and aviation navigation. It uses 26 Roman letters, Arabic numerals, and a small set of punctuation marks.
Standard sequences like BT (-...-) or AR (.-.-.) used in radio traffic to manage channel flow and signal the end of a message.
Our local V8 implementation ensures that as you type, the dots and dashes appear instantly, mimicking the real-time feedback of a mechanical telegraph key.
1. What it does
The Kodivio Telegraph Engine performs bidirectional translation between plaintext and International Morse Code following the ITU-R M.1677-1 standard. Type text to get dots and dashes; paste Morse signals (using . - and / for word breaks) to decode back to text. All 26 Latin letters, digits 0-9, and standard punctuation are mapped per the ITU specification.
2. Why it matters
Morse code remains actively used in 2026 by amateur radio operators (CW operators), military communications, and aviation navigation aids (VOR/NDB identifiers broadcast in Morse). It is the last-resort communication protocol when digital, voice, and satellite channels fail — a 3-dot-3-dash-3-dot SOS signal can be transmitted via flashlight, sound, or radio carrier wave with zero infrastructure.
3. Real Use Cases
- ●Amateur Radio (CW): CW (Continuous Wave) Morse operation is required for certain amateur radio license classes and allows very long-distance communication with minimal transmitter power — often used in DXing and contesting.
- ●Aviation Navigation: VOR, NDB, and ILS ground beacons transmit their 2-3 letter identifier in Morse Code so pilots can verify they are tuned to the correct station using a Morse decoder.
- ●Emergency Preparedness: SOS (
... --- ...) transmitted via mirror, flashlight, or whistle requires no technology beyond basic light or sound — the ultimate zero-infrastructure distress signal.
4. ITU-R Timing Specification
| Element | Duration | Description |
|---|---|---|
| DOT (dit) | 1 unit | Shortest signal element — the reference |
| DASH (dah) | 3 units | Always exactly 3× the DOT duration |
| Between dots/dashes | 1 unit | Gap within the same character |
| Between characters | 3 units | Gap between letters in a word |
| Between words | 7 units | Represented as '/' in text notation |
At 20 WPM (words per minute), one unit = 60ms. Standard practice sends PARIS as a reference word (50 units).
5. Most Critical Characters
Morse Code FAQ
The most effective method is the Koch method — starting with just two characters (K and M) at full target speed, then adding one character at a time until the full alphabet is learned. Apps like LCWO.net implement this approach. Critically: learn by sound rhythm, not by counting dots and dashes visually — visualizing slows proficiency dramatically.
Per ITU-R M.1677-1: a DOT = 1 unit; a DASH = 3 units; the gap between elements of the same character = 1 unit; the gap between characters = 3 units; the gap between words = 7 units. At 20 WPM, one unit ≈ 60ms. Maintaining exact ratios is what separates machine-readable Morse from imprecise hand-keyed signals.
Yes — Aldis signal lamps, signal mirrors (heliographs), and flashlights all carry Morse via modulated light. The Royal Navy used Aldis lamps for ship-to-ship communication well into the digital era, precisely because light signals require no radio frequency allocation, cannot be electronically jammed, and leave no electromagnetic signature.
A prosign (procedure sign) is a two-letter Morse sequence sent without the inter-character gap — making it a single compressed signal. Key prosigns: AR (end of message), SK (end of contact), BT (break / new paragraph), KN (specific station invited to reply only). SOS itself is a prosign — the lack of gaps makes it unmistakable.
The ITU removed mandatory Morse proficiency requirements for amateur radio licenses in 2003, and most countries (including the US) no longer require it for any license class. However, CW (Continuous Wave Morse) remains extremely popular due to its unique ability to punch through interference and achieve contacts with minimal power — 5W CW can often match 100W voice communication over the same path.
Yes. Kodivio's Zero-Server architecture runs the entire translation table lookup in your browser's local JavaScript engine. Your text inputs and decoded signal outputs never leave your device — there are no server logs, no analytics of tool inputs, and no data retention of any kind.