How to Change Text Case: Upper, Lower, Title and More

Each option exists for a different job, so picking the right one saves a round of edits.

UPPERCASE and lowercase are the simple ones: force every letter up or down, handy for fixing a stray caps-lock mishap or normalising data.

Title Case capitalises the first letter of every word, which is what you want for headings, titles and proper-noun lists. Sentence case capitalises only the first letter after each period, question mark or exclamation mark, so paragraphs read naturally again.

The last three are for code and the web. camelCase joins words with no spaces and capitalises each word after the first (myVariableName) for JavaScript and similar languages. snake_case joins words with underscores (my_variable_name), common in Python and database columns. kebab-case joins them with hyphens (my-variable-name), the standard for URLs, CSS classes and file names.

For camelCase, snake_case and kebab-case, the converter is smart about word boundaries: it splits not just on spaces but also on existing underscores, hyphens and capital letters. That means "HelloWorld" or "hello_world" both convert cleanly to "helloWorld" or "hello-world" without you reformatting first.

If you only need part of a document changed, paste just that part rather than the whole thing. The tool transforms everything in the box, so trimming your input gives you exactly the slice you want.

Sentence case relies on punctuation to know where sentences end. If your text has missing periods, add them before converting so each new sentence gets its capital letter.

Yes. The Case Converter runs entirely in your browser using on-device JavaScript. Your text is never uploaded to a server, never stored, and never seen by anyone but you, which makes it safe for confidential notes, client copy, code snippets or anything you'd rather not paste into a random website.

Because the work happens locally, there's also no sign-up, no email capture and no usage cap. You can convert a one-line title or a ten-thousand-word draft, as many times as you like, completely free. You can even disconnect from the internet after the page loads and it will keep working.

"My text didn't change." Some conversions look almost identical to the original. If your text is already lowercase and you click lowercase, nothing visibly happens, which is expected. Try the case you actually need.

"Title Case capitalised small words like 'and' or 'the'." Title Case capitalises the first letter of every word by design. If a style guide wants those words lowercase, do a quick manual tweak after copying.

"The buttons are greyed out." The convert and copy buttons stay disabled until there's text in the box. Add some text and they'll activate.

"Copy didn't work." Some browsers block clipboard access on insecure connections or in private modes. If "Copy result" doesn't respond, select the text in the box and copy it manually.