Substitution Solver

This tool solves monoalphabetic substitution ciphers, also known as cryptograms. These are ciphers where each letter of the clear text is replaced by a corresponding letter of the cipher alphabet.

As an example here is an English cryptogram this tool can solve:

Rbo rpktigo vcrb bwucja wj kloj hcjd, km sktpqo, cq rbwr loklgo 
vcgg cjqcqr kj skhcja wgkja wjd rpycja rk ltr rbcjaq cj cr.
-- Roppy Lpwrsborr

A Python implementation of this breaker is provided on GitLab.

If you want to break a polyalphabetic cipher instead try the Vigenère Solver.