Case Converter
Convert text to UPPERCASE, lowercase, Title Case or Sentence case.
About this tool
The case converter rewrites your text in a different letter case without you having to retype it — switch a heading to Title Case, force a shouty block of ALL CAPS back to lowercase, or tidy a pasted sentence into Sentence case in one step.
Each case has its own everyday use. UPPERCASE is used for emphasis, acronyms and short labels, though large blocks of it are harder to read and can feel like shouting. lowercase is useful for normalising text before comparing or storing it, and for a deliberately informal look. Title Case — capitalising the main words — is the convention for headlines, book and article titles, and many UI labels. Sentence case, where only the first word and proper nouns are capitalised, is the natural style for ordinary prose and increasingly for headings too.
Converting case by hand is slow and error-prone, especially across a long passage, and retyping risks introducing typos. Doing it in one pass keeps the wording identical and only touches the capitalisation, which is exactly what you want when you're reformatting a title you've pasted in, cleaning up text that arrived in the wrong case, or preparing copy to match a house style.
The conversion happens in your browser as soon as you choose a case, so nothing you paste is uploaded or stored.
Frequently asked questions
- What's the difference between Title Case and Sentence case?
- Title Case capitalises the first letter of each main word, the way a headline does. Sentence case capitalises only the first word of the sentence (plus proper nouns), the way ordinary writing does.
- Does Title Case leave small words lowercase?
- Styles differ on whether short words like "and", "of" and "the" should be capitalised. This tool applies a straightforward rule; if you follow a specific style guide, give the result a quick check for those minor words.
- Will converting case change my actual words?
- No. Only the capitalisation changes — the words, spacing and punctuation stay exactly as you entered them.
- Can I convert a large block of text at once?
- Yes. Paste as much as you like; the whole passage is converted in a single step rather than line by line.
- Is my text sent to a server?
- No. The conversion runs entirely in your browser, so nothing you paste is uploaded or saved.