Case Converter

Paste any text and see it in nine common cases at once — no need to pick a mode first. It's built for developers renaming variables and writers fixing capitalization alike.

The formats

• UPPERCASE / lowercase — flip every letter one way.
• Title Case — capitalize the first letter of each word.
• Sentence case — capitalize the first letter of each sentence.
• camelCase — firstWordLowercaseRestCapitalized, no separators. Common for JS/TS variables.
• PascalCase — like camelCase but the first word is capitalized too. Common for class names.
• snake_case — lowercase words joined by underscores. Common in Python and SQL.
• kebab-case — lowercase words joined by hyphens. Common for URLs and CSS.
• CONSTANT_CASE — uppercase words joined by underscores. Common for constants and env vars.

How word boundaries are detected

The converter splits on spaces, hyphens, and underscores, and also on camelCase boundaries — so fooBarBaz and foo-bar-baz both become the same three words. Acronyms like HTMLParser split into HTML and Parser.

Privacy

All conversion happens in your browser. Nothing you paste is uploaded or stored.