Lexicon Morph by sieuDEVtry

Lexicon Morph lets you quickly convert text between different case styles, such as UPPERCASE, lowercase, Title Case, and more.
You can paste or type text, preview the transformed result instantly, and export or copy it for use elsewhere.
It’s a simple and efficient tool for writers, developers, and editors who need consistent formatting.
All processing is done locally in your browser—no data is stored or transmitted online.