Convert Case
Switch text between UPPER, lower, Title, camelCase, snake_case, kebab-case and more. Runs entirely in your browser — nothing is uploaded.
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Which case should I use?
Conventions are per-language, and mixing them is the fastest way to make a codebase feel unmaintained:
camelCase— variables and functions in JavaScript, TypeScript, Java, Dart.PascalCase— classes and types almost everywhere; React components.snake_case— Python and Ruby identifiers, SQL columns, PHP (WordPress-era).SCREAMING_SNAKE_CASE— constants and environment variables.kebab-case— URLs, CSS classes, HTML attributes, CLI flags, npm packages.
The one rule that matters more than the choice itself: pick one per context and never mix two in the same layer.