Case Converter

Text case converter

Text case controls how words are capitalized and separated. This converter turns plain text, headings, identifiers, file names, and URL fragments into ten common writing and programming formats without changing the original input.

Supported formats

Format	Example	Common use
UPPERCASE	HELLO WORLD	Labels, warnings, emphasis
lowercase	hello world	Normalized text and searches
Sentence case	Hello world	Sentences and descriptions
Title Case	Hello World	Headings and article titles
camelCase	helloWorld	JavaScript and Java identifiers
PascalCase	HelloWorld	Classes, types, and components
snake_case	hello_world	Python variables and database fields
SCREAMING_SNAKE_CASE	HELLO_WORLD	Constants and environment variables
kebab-case	hello-world	URLs, CSS classes, and file names
dot.case	hello.world	Namespaces and dotted keys

How conversion works

The converter recognizes spaces, underscores, hyphens, dots, and camel-case boundaries as word separators. Uppercase and lowercase modes preserve every character position and only change letter casing. Naming formats normalize words before applying their separator and capitalization rule.

For example, releaseCandidate_v2 becomes release candidate v2, then:

• releaseCandidateV2 in camelCase
• ReleaseCandidateV2 in PascalCase
• release_candidate_v2 in snake_case
• RELEASE_CANDIDATE_V2 in SCREAMING_SNAKE_CASE
• release-candidate-v2 in kebab-case

Programming naming conventions

Use the convention expected by the language or framework:

const apiResponse = parseResponse(payload);

api_response = parse_response(payload)

public class ApiResponse {
    private final String requestId;
}

camelCase is common for variables and functions, PascalCase for classes and components, and snake_case for Python and many data systems. SCREAMING_SNAKE_CASE usually signals a constant rather than a regular variable.

URLs, CSS, and file names

kebab-case is generally the safest choice for URL paths because it is readable, portable, and easy to scan. It also works well for CSS classes and file names. Use lowercase or dot.case when integrating with systems that already define those conventions.

/guides/text-case-converter
.user-profile

Writing and editorial uses

Sentence case is easier to read in interface descriptions, help text, and longer headings. Title Case can suit short titles, but capitalization rules vary by editorial style. The converter applies consistent capitalization to every word; review proper nouns and brand names afterward.

Common questions

Does conversion change the input?

No. Input remains untouched while a separate output is generated.

Can it convert existing camelCase or snake_case?

Yes. Camel-case boundaries and common separators are split into words before the selected format is applied.

Which format should I use for a URL?

Use kebab-case, such as text-case-converter. It keeps words readable and avoids spaces in URL paths.

Which format should I use for constants?

Use SCREAMING_SNAKE_CASE, such as MAX_RETRY_COUNT, when your language or project uses that convention for constants.