Case Converter
Rewrite letter case in the paste you provide. Unicode letters follow the en-US locale rules in this browser.
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How to convert case
- Paste or type the text in Input.
- Choose a letter case or an identifier style.
- Identifier styles split on spaces, punctuation, and camelCase boundaries.
- Copy or download the rewritten output.
Letter case
Orthographic case transformation
| Upper / lower | Locale en-US mapping of letters |
|---|---|
| Title case | First letter of each whitespace-separated word; other letters lower |
| Sentence case | First letter after the start or after . ! ? plus space |
| Invert | Swap upper and lower on each letter |
What this page changes
Case conversion rewrites letters. It does not translate, wrap, or encode the string. Punctuation and digits stay as they are. For JSON whitespace, use the JSON formatter. For percent-encoding, use URL encode.
Title case and sentence case
Title case capitalizes the first letter of each whitespace-separated token and lowers the rest. It does not skip small words such as "of" or "the". Sentence case lowers the whole string, then raises the first letter of the text and of each sentence that starts after a period, question mark, or exclamation mark plus space.
Locale
Mapping uses the en-US locale in this browser. A few letters (for example dotted and dotless i) can differ in other locales. If you need a specific locale, convert in an editor that exposes that locale.