What is the difference between camelCase and PascalCase?

Both join words with no separators and capitalise each word, but camelCase keeps the very first letter lowercase (helloWorld) while PascalCase capitalises it too (HelloWorld). camelCase is common for JavaScript variables and functions; PascalCase is common for class and type names.

When should I use snake_case versus kebab-case?

snake_case (hello_world) joins lowercase words with underscores and is standard in Python, Ruby and database columns. kebab-case (hello-world) uses hyphens and is the convention for URLs, CSS class names and HTML attributes, because many languages cannot use a hyphen inside an identifier.

What is CONSTANT_CASE used for?

CONSTANT_CASE, also called SCREAMING_SNAKE_CASE, joins uppercase words with underscores (MAX_RETRY_COUNT). It signals a fixed, compile-time constant or an environment variable across almost every programming language, so readers know the value is never reassigned.

How does the converter handle existing mixed-case input?

It first splits your text into individual words by detecting camelCase boundaries, separators (spaces, hyphens, underscores, dots, slashes) and letter-to-digit transitions, then rebuilds those words in the target case. So getHTTPResponse2 and get-http-response-2 both tokenise the same way and convert cleanly.

What does Smart Title Case do differently?

With Smart Title Case on, common minor words such as a, an, the, of, and, to and in stay lowercase unless they are the first or last word — matching most editorial style guides. Turn it off to capitalise every single word instead.

Is my text uploaded anywhere?

No. Every conversion runs in your browser with JavaScript. Nothing is sent to a server, and your recent inputs are saved only in your own browser via localStorage, so the tool is safe for private code, names and notes.

Text Case Converter — Gera Tools

The Text Case Converter instantly rewrites any text in every common programming and writing case at once. Paste a sentence, a heading, or an existing identifier and watch it appear as camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, Title Case, Sentence case, dot.case, path/case and several more — all updating live as you type. It is built for developers renaming variables, writers fixing headlines, and anyone tidying up columns of names or labels without retyping a word.

Unlike a simple uppercase/lowercase toggle, this tool understands word boundaries. It reads getHTTPResponse, get-http-response and Get HTTP Response as the same three words and can convert between them in any direction. That makes it equally useful for translating an API field name into a CSS class, turning a product title into a URL slug, or normalising a messy spreadsheet column into clean snake_case keys.

How it works

Behind the scenes the converter runs a small tokeniser. It inserts boundaries at camelCase humps, between letters and digits, and at every separator character, then lowercases each resulting word. From that neutral list of words it rebuilds your text in whichever case you need: joining with underscores for snake_case, hyphens for kebab-case, nothing for camelCase, or spaces with capitalisation for Title Case. Letter-level cases like UPPERCASE, toggle case and alternating case operate directly on the original characters so punctuation and spacing are preserved exactly.

Turn on Per-line batch and each line is converted independently, which is perfect for lists of identifiers or a pasted spreadsheet column. The Smart Title Case option follows editorial style by leaving minor words such as “of” and “the” lowercase, while still capitalising the first and last word. A running word, character, line and sentence count sits above the results, and you can copy any single case, reuse a result as the next input, or download every case as a plain-text file.

Example

Type The quick brown fox JUMPS over the lazyDog and you immediately get:

camelCase → theQuickBrownFoxJumpsOverTheLazyDog
snake_case → the_quick_brown_fox_jumps_over_the_lazy_dog
kebab-case → the-quick-brown-fox-jumps-over-the-lazy-dog
CONSTANT_CASE → THE_QUICK_BROWN_FOX_JUMPS_OVER_THE_LAZY_DOG
Title Case (smart) → The Quick Brown Fox Jumps Over the Lazy Dog
Sentence case → The quick brown fox jumps over the lazy dog

Everything runs locally in your browser. Nothing you type is uploaded or stored on a server — your recent inputs live only in your own browser so you can safely convert private names and code.