Cryptogram Assistant
This helps you manually solve simple ciphers, which are methods where you replace one letter with another.
This tool helps you decode ciphers. It's extremely flexible, allowing multiple cipher text symbols to map to a single plain text letter, symbol, or even emoji. To use this, you enter the cryptoquip or cryptogram to be translated and a table of replacement letters will be shown. From here, you can manipulate the letter mapping and attempt to find a solution.