Case Converter
Convert text to UPPER CASE, lower case, Title Case, or Sentence case instantly.
Stays in your browser · Always freeThe four casing styles above cover almost every situation that calls for re-cased text: book and article titles, headlines, normalizing copy-pasted content, fixing accidental caps lock. Paste in any length of text - a word, a paragraph, a whole document - and one click swaps it. Everything runs in your browser, so the text never leaves your device.
Casing styles, briefly
UPPER CASE capitalizes every letter. Used sparingly in body copy (it reads as shouting), but standard for acronyms, signage, and certain technical contexts.
lower case de-capitalizes everything. Useful when you've copied text from a source that's accidentally all-caps, or when normalizing user input before storage or comparison.
Title Case capitalizes the first letter of every word - "The Quick Brown Fox Jumps". The classic style for book and article titles, but with a wrinkle: most style guides (AP, Chicago) leave articles and short prepositions in lowercase ("of," "and," "the" mid-sentence). Different tools handle this differently; this one capitalizes every word for simplicity.
Sentence case capitalizes only the first word of each sentence and proper nouns - "The quick brown fox jumps". Increasingly the default for headlines on the web because it reads as more conversational. Punctuation matters: the converter splits on ., !, and ? to find sentence boundaries.
When to pick which
Either Title Case or Sentence case works. Pick one and stick to it across your site - consistency matters more than which one. Sentence case has been trending for the last several years across most major publications.
Sentence case is now the dominant convention in software UI ("Sign in," "Forgot password"). Title Case ("Sign In," "Forgot Password") still appears but feels dated. ALL CAPS labels read as aggressive in modern interfaces.
Sentence case is friendlier and tends to test better. ALL CAPS triggers spam filters and reads as desperate.
Text from PDFs and scanned documents often arrives in inconsistent or all-caps form. Convert to lower, then to sentence case, to get something close to normal.