1. A computer-implemented method of generating a visualization of a plurality of words inside a predefined shape, the method comprising: storing, in a computer readable medium, a plurality of values, each corresponding to one of the plurality of words; selecting a maximum word size; computing a word size for each of the plurality of words based on the value corresponding to the word and the maximum word size; obtaining a word color for each of the plurality of words; and generating an image data structure including an image having the plurality of words, each word having the corresponding word size and the corresponding word color; wherein selecting the maximum word size includes: generating a first set of maximum word sizes; for each maximum word size in the first set, arranging the plurality of words such that a first word of the plurality of words has the maximum word size and remaining words of the plurality of words are not larger than the maximum word size, and determining whether the arrangement of the plurality of words satisfies a first criterion, the first criterion being that none of the words in the arrangement are outside the predefined shape; selecting the largest maximum word size in the first set having an arrangement of the plurality of words that satisfies the first criterion.