Write and read Morse code — including Japanese kana

The job

You want to send SOS, practice signals, write a puzzle clue, or decode something tapped out in dots and dashes. Letters are separated by single spaces, words by a slash.

Encode a message

Choose "Text → Morse", type SOS, and you get ... --- ... — three dots, three dashes, three dots. The international table covers A–Z, digits, and the common punctuation used on the wire.

Switch the code table to kana and こんにちは converts with the Japanese wabun codes. Voiced kana are sent as the base kana plus the dakuten mark, exactly as telegraph operators sent them — and the decoder rejoins them.

• Unknown characters are skipped and listed under the result, not silently dropped.
• Small kana (ゃ, ゅ, ょ…) are sent as the full-size equivalents, matching telegraph practice.

Decode Morse

Switch to "Morse → text" and paste the signal. Letters split on single spaces, words on "/" or three-plus spaces. --.-- .-. .-.-.- becomes ン — the table switch decides whether -...- reads as X or メ, so pick the mode that matches the sender.

Limits

No audio or timing — this converts text, it does not beep. Wabun punctuation and some prosigns are outside the table; Latin letters and digits work in both modes.