Text Case Converter Guide: When to Use Each Case

UPPERCASE

Shouting. Use sparingly — for legal notices, warnings, section labels and short buttons.

lowercase

Casual and modern. Common in tech branding and hashtag-style headlines.

Title Case

Article headlines, book titles, product names. The convention varies (some styles cap prepositions, others don't); the Text Case Converter uses simple first-letter-of-each-word Title Case.

Sentence case

The default for body copy and most modern web headlines. Only the first letter and proper nouns are capitalised.

camelCase

JavaScript variables, JSON keys, function names in many languages.

snake_case

Python variables, database column names, environment variables (when combined with UPPER: SCREAMING_SNAKE_CASE).

kebab-case

CSS class names, URL slugs, npm package names.

A case converter is fine for mechanical transformations — a list of headings, a batch of variable names, a slugification pass. It's not fine for style questions: whether to use Title or Sentence case for your blog headlines is a brand decision, not a tooling decision.

Pick a convention in your style guide, then use the converter to enforce it across the site.