How to Convert Text Case Online (Without Retyping Anything)

The five case styles that matter

Nearly every case-related task falls into one of five styles. Knowing the names makes it much faster to pick the right one.

• UPPERCASE — every letter capitalised, used for short labels and acronyms
• lowercase — every letter reduced, used for tags, slugs and code identifiers
• Title Case — first letter of each word capitalised, used for headings
• Sentence case — first letter of each sentence capitalised, used for prose
• aLtErNaTiNg — alternating capitals, used for the mocking meme style

Fixing accidental Caps Lock

If a whole paragraph arrived in capitals, converting straight to lowercase is only half the fix — you then need sentence capitalisation back. The reliable two-step is: convert to lowercase first, then apply Sentence case. Afterwards, re-capitalise proper nouns manually, because no automated converter can reliably tell a name from a common word.

Title Case is not one standard

AP style, Chicago style and APA style disagree about which small words to capitalise. A general converter capitalises every word, which is correct for navigation labels and product names but slightly over-capitalised for editorial headlines. For published articles, convert first and then lowercase the minor words (a, an, the, of, in, on, and, or) yourself.

Accents, emoji and other alphabets

Good converters use JavaScript's Unicode-aware case methods, so é becomes É, ñ becomes Ñ and Cyrillic or Greek text converts correctly. Emoji and punctuation pass through untouched because they have no case.

Tools mentioned in this guide

FAQ

More guides