"Change Text Case" tools refer to software or online tools that allow you to change the capitalization or case of text. These tools can be used to convert text to uppercase, lowercase, title case, sentence case, or other variations of capitalization.

Uppercase: This option converts all letters in the text to uppercase, which means all letters will be in capital letters.

Lowercase: This option converts all letters in the text to lowercase, which means all letters will be in small letters.

Title case: This option capitalizes the first letter of each word, except for conjunctions, prepositions, and articles.

Sentence case: This option capitalizes the first letter of the first word of each sentence and makes the rest of the text lowercase.

These tools are helpful when you need to change the capitalization of text in a document or an email quickly. They save time and effort compared to manually changing the capitalization of each word.