Case Converter

Why capitalisation carries so much weight

Capitalisation is one of the quietest but most reliable signals of care in written work. Text in all capitals reads as shouting and is measurably slower to read, because we recognise words partly by their outline shape and capitals flatten every word into the same rectangle. Text with no capitals at all reads as casual or careless in most professional contexts. Inconsistent capitalisation across a set of headings — some in Title Case, some in Sentence case — is exactly the kind of small incoherence that makes a document, a website or a slide deck feel unpolished, even to readers who could not articulate why. Getting it right costs nothing and is noticed mainly in its absence.

Choosing a convention and sticking to it

There is no universally correct answer, only a consistent one. American style guides such as AP and Chicago traditionally favour Title Case for headlines, with rules about which small words stay lowercase. British publishing and most modern software design lean towards Sentence case, arguing that it reads more naturally and is easier to apply consistently — you do not have to remember whether 'with' gets a capital. Apple, Google and most design systems now specify Sentence case in their interface guidelines for precisely that reason. The important thing is to pick one convention for a given document or product and apply it everywhere, rather than mixing them heading by heading.