Case Converter — UPPERCASE, Title Case & More Free 2026

When to use each case format

UPPERCASE — headings, acronyms, emphasis, screaming at the internet
lowercase — casual writing, some brand names (adidas, reddit), email addresses
Title Case — article and book titles, page headings, proper nouns
Sentence case — standard English sentences, UI labels, descriptions
camelCase — JavaScript variables and functions (myVariableName)
PascalCase — class names, React components, TypeScript interfaces
snake_case — Python variables, database column names, file names
kebab-case — CSS classes, HTML attributes, URL slugs
CONSTANT_CASE — environment variables, constants in any language
dot.case — configuration keys, property accessors in some frameworks

Frequently Asked Questions

Title Case capitalizes the first letter of every major word. Short words like "a", "an", "the", "of", "in", "on", "at", "for", "and", "but", "or", "nor", "so", "yet" are typically kept lowercase unless they're the first or last word of the title. Our tool follows the Chicago Manual of Style convention — the most widely used style guide for publishing.

Both join words without spaces and capitalize each word. The difference is the first letter: camelCase starts lowercase (myVariable), PascalCase starts uppercase (MyVariable). camelCase is standard for JavaScript/TypeScript variables and methods. PascalCase is used for class names, React components, and type definitions across most languages.

Google's John Mueller confirmed in 2019 that hyphens in URLs are treated as word separators by Google's crawler, while underscores are not — so "word-counter" is two words to Google but "word_counter" is treated as one. For SEO purposes, kebab-case URLs are preferred. That said, for internal application routes or API paths, snake_case is just as valid since those aren't typically indexed.