Main features
Text conversion, done properly.
Case and width
UPPERCASE, lowercase, title case and sentence case, plus full-width to half-width and back, working on letters, punctuation and digits.
Encoding and data
URL, HTML, Base64 and Unicode escaping both ways, plus JSON formatting and minifying - and the result can be converted again straight away.
Tidy and save
Trim the whitespace at the ends of lines, delete blank lines and collapse repeated spaces; the result can be copied or saved as UTF-8 text.
Local processing
Every conversion runs on your machine, the text is never uploaded, and there is no sign-up or login.