Change the case
Title case skips the small words a style guide would leave lowercase, unless they start the line.
Make a slug
Accents are folded, punctuation dropped, spaces become hyphens. Suitable for a URL or a filename.
Frequent words
The ten words you lean on most, with common filler words set aside.
Tidy the whitespace
Fixes what usually breaks after copying out of a PDF or an email: doubled spaces, stray line breaks mid-sentence, invisible characters.