Case Converter
Rewrite text into UPPER, lower, Title, Sentence, camelCase, snake_case, kebab-case or aLtErNaTiNg case, with a before-and-after character comparison.
Fill in the values and calculate
The form sends itself back to this page — results print below, computed on the server.
No results yet: fill the form above and press Calculate.
About Case Converter
The in-place styles keep your punctuation and spacing: UPPER and lower flip every letter, Title capitalises each word except small words such as of, the and on, and Sentence case keeps one capital per sentence.
The joined styles rebuild the text from its words: camelCase, snake_case and kebab-case split words on spaces, punctuation and existing camel humps, then rejoin them with the style's own separator.
The card comparison counts letters whose case actually changed, so you can see how much a rewrite moved before you copy it back.
Questions about Case Converter
Which words stay lower-case in Title case?
Small words such as a, of, the, on and with stay lower unless they open the title. Headline styles differ on this point, so check the result before you publish.
Does camelCase keep my punctuation?
No. Words are split on spaces, punctuation and existing capitals, then rejoined with none, an underscore or a hyphen, so commas and brackets are dropped.
What does aLtErNaTiNg case do?
It flips the case of every letter in order, leaving spaces, digits and punctuation untouched.
Bookmark and homescreen
- Press Ctrl+B now (or Cmd+B on macOS) to bookmark this page in your browser.
- Drag this link to your bookmarks bar and it will always open this tool: Case Converter.
- On a phone: open in Chrome/Safari and use "Add to Home Screen" — the site ships a homescreen icon and manifest, so it installs like an app.
- Two addresses work:
https://useful-utilities.com/case-converter/andcase-converter.useful-utilities.com. Copy whichever you prefer.