About

A cryptogram is a short quotation with its letters swapped for other letters — every A becomes the same letter throughout, every B another, and the puzzle is working out which is which. Letter frequency, word shape and a little guesswork do the rest.

Cryptogram Online deals you one at a time, remembers what you have solved, and never gives you the same quotation twice.

Every quotation is graded on what its own letters give away, rather than on how long it is. There is a page on each grade — what makes one easy, what puts one in the middle, and what makes one hard — written from the catalogue itself.

There is more to say here, and it is coming. Until then, get in touch — questions, corrections and quotations worth adding are all welcome.