Usage Notes WhatTheFont supports most common image formats, for example GIF, JPEG, TIFF, BMP . The maximum image size is around 360 x 275 pixels. You may upload images with a greater width and lower height. The ideal letter height for the best search result is about 100 pixels . The minimum letter height is 40 pixels.
Larger letters increase search time.
Try to get the text horizontal . WhatTheFont only requires a few letters of the alphabet to identify the font. More letters will only increase search time, not search accuracy. Try to submit just one example of each character. Duplicate characters only increase search time.