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TinyTools

Case Converter

Retype nothing — switch the case and copy it back out.

The four programming cases fold the whole input into one identifier, so they do not keep line breaks.

Everything is processed on your device. Nothing you upload or type is sent to a server, and nothing is stored.

Case Converter online

Caps Lock left on for a paragraph, a heading that needs title case, a column of labels that has to become snake_case for a database — all the same job, and all miserable by hand. Paste the text, pick a case, copy the result. Everything happens as you type, and long documents are fine because none of it leaves the page.

How to use case converter

  1. Paste your text

    Anything from a word to a whole document.

  2. Choose a case

    Sentence, Title, UPPER, lower, camelCase, PascalCase, snake_case or kebab-case.

  3. Copy or download

    Take the result to your clipboard, or save it as a text file.

Frequently asked questions

What is the difference between title case and capitalised words?

Capitalising every word gives you "The Lord Of The Rings". Real title case leaves short joining words — a, of, the, and, in — in lowercase unless they start or end the title, giving "The Lord of the Rings". This tool follows that convention.

What are camelCase, PascalCase, snake_case and kebab-case for?

They are the naming conventions programmers use where spaces are not allowed. camelCase for variables in JavaScript and Java, PascalCase for class and component names, snake_case for Python and database columns, kebab-case for URLs, CSS classes and file names.

Does sentence case fix each sentence or just the first?

Each one. The text is lowercased, then the first letter after every full stop, question mark or exclamation mark is capitalised, so a paragraph typed entirely in capitals comes back properly punctuated rather than as one long sentence.

Will it keep my line breaks?

Yes, for the prose cases — UPPER, lower, Sentence and Title all preserve your paragraphs exactly. The programming cases cannot: camelCase and its relatives are single identifiers by definition, so the whole input is folded into one token.

Is there a limit on how much text I can paste?

Only what your browser can hold, which is far more than anyone pastes in practice. Since the conversion runs on your own machine there is no upload, no queue and no size cap imposed by a server.

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