Case Converter

Which case to use where

• camelCase: JavaScript variables, TypeScript, Java methods/fields. userName.
• PascalCase: classes, types, React components. UserProfile.
• snake_case: Python variables/functions, Ruby, SQL column names. user_name.
• CONSTANT_CASE (SCREAMING_SNAKE): constants in C, C++, JavaScript. MAX_RETRIES.
• kebab-case: URLs, CSS class names, CLI flags, HTML attributes. user-name.
• UPPER-KEBAB: HTTP headers. CONTENT-TYPE.
• dot.case: package names in Java, config keys. user.profile.name.
• path/case: URL paths, filesystem. user/profile/name.
• Title Case: headings, book titles, article titles.
• sentence case: regular prose with just the first word capitalized.

Smart tokenization

This tool's tokenizer recognizes all common conventions as input. Paste fooBarBaz, FooBarBaz, foo_bar_baz, foo-bar-baz, or foo.bar.baz: all produce the same three tokens. Consecutive capitals are handled correctly: XMLParser becomes xml and parser, not x and mlparser.

Bulk mode

Paste one item per line, turn on bulk mode, and every line converts independently. Useful for migrating variable names, converting CSV column headers, or mass-renaming.

Common case-conversion bugs

• Word boundaries: naive converters split "HTMLParser" into "h", "t", "m", "l", "parser" or join it as "Htmlparser". This tool uses the capital-followed-by-capital-then-lowercase heuristic to keep acronyms intact.
• Trailing separators: "foo__bar" should tokenize to foo, bar, not include an empty token.
• Numbers: "version2" is typically one token (version2). "v2API" is v2 + api.

Related articles

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