Morse decoding, configurable dot/dash, optional prosigns
Morse decoding reverses the dots-and-dashes-per-letter mapping back into letters. Input format expected: each Morse sequence (the dots and dashes for a single letter) separated by a single space, words separated by / (space, slash, space). So ... --- ... / .... . .-.. .--. decodes to sos help. The output is lowercase by default; uppercase the result via uppercase if needed.
The Dot and Dash fields let you decode Morse that uses non-standard glyphs. If the input uses o for short and = for long, set the fields to match and the decoder normalises them back to . and - internally before lookup. Default values are . and -, the printed-Morse standard.
Toggle Prosigns on to recognise operator messages (procedural signals): -.- alone is the letter K in normal mode but the prosign KN ("invitation for named station") when prosigns are on; ...-.- is rendered as [SK] ("end of contact"). Off by default to avoid surprising substitutions for normal text. Sequences not in the Morse table produce empty letters silently. For encoding text into Morse, see Text to Morse code.
How to use morse code to text
- 1Paste your Morse code into the input panel: dots/dashes per letter separated by single spaces, words by
/. - 2The decoded text appears in the output panel as you type.
- 3Set the Dot and Dash fields if your input uses non-standard glyphs.
- 4Toggle Prosigns on to translate operator messages like
[SK]and[KN]. - 5Click Copy in the output header to copy the decoded text.
Keyboard shortcuts
Drive TextResult without touching the mouse.
| Shortcut | Action |
|---|---|
| Ctrl F | Open the find & replace panel inside the input Plus |
| Ctrl Z | Undo the last input change |
| Ctrl Shift Z | Redo |
| Ctrl Shift Enter | Toggle fullscreen focus on the editor Plus |
| Esc | Close find & replace, or exit fullscreen |
| Ctrl K | Open the command palette to jump to any tool Plus |
| Ctrl S | Save current workflow draft Plus |
| Ctrl P | Run a saved workflow Plus |
What this tool actually does
International Morse table for letters and digits
Decodes A-Z and 0-9 from their International Morse sequences. ... -> s, --- -> o, ----- -> 0. Output is lowercase; pipe through uppercase if you want capitals.
Letter and word boundary parsing
Splits the input on / first to find word boundaries, then on whitespace within each word for letter boundaries. So ... --- ... / .... . .-.. .--. parses as two words, three and four letters respectively, decoding to sos help.
Custom Dot and Dash normalisation
Set Dot to whatever glyph your input uses for short, and Dash for long. The decoder swaps them back to . and - before lookup. Defaults are . and -.
Prosigns toggle
Off by default. On translates operator messages: -.- -> [KN], .-... -> [AS], ...-.- -> [SK], -...- -> [BT], .-.-. -> [AR], ...-. -> [SN], -.-.- -> [CT]. Bracketed labels make them visible in the output.
Unknown sequences produce empty letters
A Morse sequence not in the table (typo, off-by-one, garbled) decodes as an empty string for that letter. The result skips that position rather than throwing. Common fix: check that you are using single spaces between letters and / between words.
Worked example
Each Morse sequence decodes to its letter; the / token translates to a literal space. Output is lowercase. For the inverse, see Text to Morse code.
... --- ... / .... . .-.. .--.
sos help
Settings reference
| Behaviour | Effect on output |
|---|---|
| Letter separator | Single space between Morse sequences within a word. |
| Word Sep | Default / . Set to whatever your source uses (e.g. three spaces, or a custom marker). The decoder splits the input on this token to find word boundaries; legacy slash-with-spaces is also accepted as a fallback. |
| Dot | Default .. Set to whatever glyph your input uses for short signal; the decoder normalises back to . before lookup. |
| Dash | Default -. Set to whatever glyph your input uses for long signal. |
| Prosigns | Off by default. On translates seven operator-message sequences (KN, AS, SK, BT, AR, SN, CT) to bracketed labels. |
| Output case | Always lowercase. Pipe through uppercase for caps. |
| Unknown Morse sequences | Decode to an empty string for that letter (skipped silently). |
FAQ
Why is my decoded text missing letters?
/ with spaces around the slash. If two letter sequences run together with no space, the decoder treats them as one unknown sequence and emits nothing for that position.What are prosigns?
SK means "end of contact", AR means "end of message", BT is a paragraph break. They are sent without the inter-letter space, so ...-.- is one prosign rather than the letters SK. Toggle Prosigns on to render them as [SK], [AR], etc.Can I decode Morse with non-standard dot/dash characters?
o for short and = for long is one chunkier option; * and _ a common chat choice. The decoder normalises them back to . and - before lookup.