Case Converter

Paste your text into the converter above and click the lowercase button — every letter converts instantly. It works the other way too: one click turns lowercase into UPPERCASE. Your text never leaves your browser.

A title case converter capitalizes a headline the way style guides expect: the first and last words are always capitalized, and small words like and, the, and of stay lowercase in the middle. This converter's Title Case button follows that rule, so you get proper book-title formatting with one click.

Paste your text and click Sentence case. The converter lowercases everything, then capitalizes the first letter of each sentence — including sentences ending in exclamation marks and question marks. Short abbreviations like e.g. and Mr. are left alone so they don't falsely start a new sentence.

They are two ways of writing multi-word names in code. camelCase joins words with no spaces and capitalizes each new word (userName), while snake_case joins words with underscores in lowercase (user_name). PascalCase (UserName) is the capitalized variant of camelCase, and kebab-case (user-name) uses hyphens instead of underscores.

Use kebab-case (lowercase words joined by hyphens, like my-blog-post) for URLs, file names, and CSS class names. Hyphens are safe in web addresses and readable at a glance, which is why most websites and style guides prefer them over spaces or underscores there.

SCREAMING_SNAKE_CASE — all caps with underscores, like MAX_RETRIES — is the convention for constants in most programming languages (JavaScript, Python, Java, C). The SCREAMING_SNAKE_CASE button converts any text into that format instantly, stripping punctuation and normalizing word boundaries.

Alternating case (also called sponge case) flips every letter between upper and lower: aLtErNaTiNg cAsE. It is a meme/styling format rather than a professional one. The button alternates per letter and ignores punctuation, so your text keeps its spacing and symbols.

Your text is saved only in your own browser using localStorage, so it is still there when you come back on the same device. Nothing you type is sent to a server or any third party — there is no account and nothing to sign up for.

Yes. It is completely free with no account, no signup, and no paywall — part of The Magic Codex's collection of free student tools.