Case converter

Paste your text, pick a case. Eight common transformations, including the ones developers actually use.

When to use each

UPPER — Acronyms, constants in code (MAX_SIZE), shouting in emails (please don't).
lower — URLs, hashtags, email handles, casual writing.
Title Case — Headlines, book titles, song names.
Sentence case — Most body text, UI copy, modern brand voice.
camelCase — JavaScript variables, JSON keys, Java methods.
PascalCase — Class names in most languages, React components.
snake_case — Python variables, Ruby methods, database columns.
kebab-case — URL slugs, CSS class names, file names.