Morse code represents supported letters, numerals and punctuation as short and long signals, with silence marking the boundaries between parts of a message. A browser-based translator applies those character mappings to typed text and can decode Morse back into text when the symbols are separated clearly enough to show character and word breaks.
How Morse code works
International Morse assigns each supported character a pattern of short and long signals. These are conventionally written as dots and dashes, but the code is not just a string of marks: the duration of each signal and the pauses between signals carry information too.
The International Telecommunication Union (ITU) publishes the standard in Recommendation M.1677-1, International Morse code. The ITU lists the recommendation as “In force (Main)”; it was approved on 2009-10-03 and is available from the ITU recommendation page.
Dots, dashes and pauses
Morse timing is based on a unit whose actual duration depends on transmission speed. The proportions stay the same as the speed changes:
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- A dot lasts 1 unit.
- A dash lasts 3 units.
- The gap between marks within one character lasts 1 unit.
- The gap between characters lasts 3 units.
- The gap between words lasts 7 units.
That means the distinction between a dot and a dash is principally how long the signal lasts. The pauses are equally important: they tell a listener or decoder whether the next mark continues the same character, begins a new one or starts another word. The timing ratios are described in Morse Code Translates’ Morse timing reference.
What the written symbols show
On a screen, dots and dashes make the signal pattern visible, but spaces or other delimiters usually have to stand in for the pauses. For example, a reference chart gives S as ... and O as ---. A display of SOS as ...---... shows the continuous signal pattern; it does not show three letter boundaries. For decoding, those boundaries need to be represented or supplied by the method being used.
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How a browser-based Morse translator works
A text-to-Morse translator looks up each supported character and displays its dot-and-dash pattern. A Morse-to-text translator does the reverse: it reads the symbols and uses the chosen spacing convention to identify character and word boundaries. Some tools also offer audio playback or visual signals, but those are optional features, not part of every translator.
Text-to-Morse and Morse-to-text
For example, Morse-Code.info displays HELLO WORLD as .... . .-.. .-.. --- / .-- --- .-. .-.. -... On that site, spaces separate letters and a slash or three spaces can mark a word break. This is one readable typing convention, not a universal punctuation rule. Follow the input instructions of the particular decoder you use.
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A Morse string without clear character and word boundaries may not have a unique decoding. If you paste a sequence with the spaces removed, a translator may be unable to determine which marks belong together. When copying Morse between tools, preserve the separators or check how each tool expects word breaks to be written.
Features vary by tool
Morse-Code.info presents synchronized text and Morse input areas and offers playback, flashing light, vibration, sharing and audio download. Those are features of that page, not promises about browser translators in general. Before using a tool, check which directions it supports, which characters it accepts, how it represents spaces and what output options it provides.
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Morse-Code.info says that conversion, sound playback and WAV generation run in JavaScript on the user’s device, and that text is not transmitted or stored. That is the site’s own description of its processing, not an independent security audit; consult the site’s current privacy information if local processing matters to your decision. Browser audio can also be affected by browser support, volume, autoplay restrictions, memory, power-saving settings and background-tab scheduling. A web audio tone is not a calibrated radio transmitter.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why written Morse can look different between tools
Different-looking strings often reflect different ways of writing boundaries, not a different dot-or-dash assignment. One translator may use spaces between letters and slashes between words; another may accept a different delimiter. A continuous transmission also does not insert the visual spaces shown in a teaching chart, so a written display and an uninterrupted signal can look different.
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When a decoder returns unexpected text, check the separators first. Then check whether the tool recognizes the characters you entered and whether it expects International Morse rather than a historical code or a site-specific extension.
Character coverage and languages
International Morse defines patterns for Latin letters, Arabic numerals, selected punctuation and procedural signals. That does not mean every accented character or character from a non-Latin writing system has one universally agreed International Morse equivalent. Depending on the language and tool, text may need transliteration or normalization, may use an extension, or may be unsupported.
Before translating text with accents or characters outside the standard set, look for the tool’s explanation of how it handles them. A translator might alter, skip or map characters according to its own rules; its output should not be assumed to be the sole standard form for that language.
What to check before choosing a translator
Choose based on the job you need to do, rather than assuming that every page supports the same inputs and outputs.
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- Direction: Does it translate text to Morse, Morse to text, or both?
- Input: Does it accept typed text and symbols only, or can it process recorded or live audio?
- Output: Does it show symbols, play sound, display light or vibration, or create a downloadable file?
- Boundaries: What separates letters and words, and which spacing formats can its decoder read?
- Character coverage: Which letters, numerals and punctuation are supported, and how are accented or non-Latin characters handled?
- Processing: Does the provider explain whether processing happens locally or data is sent elsewhere? Treat a provider’s statement as its claim unless it has been independently verified.
These checks help identify whether a translator suits a particular task; they do not establish that one service is more accurate than another.
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