OTPGHOST / DIANA
LETTER-BY-LETTER DECODER
Decode a message.
Enter a U.S. ZIP code to fill the middle row with its city and state. Type the cipher letters above it; the decoded letters appear below.
Location phrase
Letter grid
Type in the top row. Paste a whole cipher at any letter.
Cipher textCity + stateDecoded
Decoded message
Your decoded letters will appear here.
Word breaks are a best guess. Edit the text above to correct spacing or add punctuation.
About the key: The city and state letters repeat for longer messages. Because ZIP locations are public and the phrase repeats, this is a DIANA-style decoder, not a secure one-time pad.