Convert text case online

Paste text on the left and the converted version appears on the right: UPPERCASE, lowercase, Title Case, Sentence case, or toggled. Title Case follows English headline style — small words like a, an, the, of, in, and stay lowercase (except the first word); Sentence case capitalises after full stops, question marks, exclamation marks and line breaks. Chinese text, numbers and punctuation are left as they are.

Runs in your browser · no sign-up

사용 방법

  1. 1 Paste or type your text
  2. 2 Choose a conversion
  3. 3 Copy the result

할 수 있는 것

  • Title Case keeps articles, prepositions and conjunctions lowercase
  • Sentence case capitalises after . ? ! and line breaks
  • Toggle case: swap upper and lower
  • Chinese text and numbers are left unchanged

할 수 없는 것

  • Proper nouns are not recognised — Sentence case will change words like “iPhone” or “NASA”
  • Works on pasted text, not Word files
  • No spell-checking

자주 묻는 질문

Which words stay lowercase in Title Case?

Short articles, prepositions and conjunctions such as a, an, the, and, but, or, for, nor, of, in, on, at, to, by, up, as — except the first word.

Does it affect Chinese text?

No. Chinese has no case and is left alone.

Are proper nouns changed?

Yes. Modes like lowercase or Sentence case do not know words like “iPhone” or “NASA” — check the result.

Can it convert a Word document?

This tool handles pasted text. In the online Word editor use Format ▸ Change case.

Is my text uploaded?

No, conversion happens in your browser.

Does it work on a phone?

Yes, with one-tap copy.