Use sentence case when you want natural, readable formatting for article introductions, editorial summaries, and newspaper-style copy. It improves readability and keeps text visually professional.

Use uppercase for emphasis, urgent notices, navigation labels, and bold headline accents. It can improve scannability when used carefully and sparingly.

Capitalized words are ideal for titles, UI labels, blog post headings, and structured content that must look polished across devices.

Alternate case and toggle case are useful for playful branding, creative projects, testing layouts, and quickly correcting mixed-case text from pasted sources.