Many people make ambigrams by writing down the word that they want to make in several fonts both right-side up and up-side down. This tool helps you with that for some quick prototyping. The Word Flipper offers three options. rotational, lake reflection and wall reflection.
Rotational ambigrams are ambigrams that can be read the same way up and when rotated 180 degrees. These are the most popular ambigrams.
Lake reflection ambigrams have symmetry along the center line, as if they are half submerged in a water and we see the reflection.
Wall reflection ambigrams can be read the same way forward and backwards. Reading them in a mirror will not change them.