Case Converter
Open toolConvert text to upper, lower, title, or sentence case.
Change the capitalisation of a block of text in one click: ALL CAPS, all lowercase, Title Case, or Sentence case. Handy for fixing text that was typed with caps lock on, or tidying headings.
How it works
Each button rewrites the text in the box, in place, using the rule below. The change is applied to whatever is currently in the box, so clicking two buttons in a row applies the second on top of the first.
How to use it
- Paste or type your text in the box.
- Click one of the four case buttons. The text in the box changes immediately.
- Click Copy to put the result on your clipboard.
Options & controls
Case buttons
- UPPERCASE
- Turns every letter into a capital.
- lowercase
- Turns every letter into a small letter.
- Title Case
- Makes everything lowercase first, then capitalises the first letter of each word. It capitalises every word, including small words like “and” and “of”.
- Sentence case
- Makes everything lowercase first, then capitalises the first letter of the text and the first letter after each
.,!or?followed by a space or line break.
Other controls
- Text box
- Holds the text. It is both the input and the output.
- Copy
- Copies the current contents of the box.
- Reset
- In the title row. Clears the box.
Tips & guidelines
- There is no undo. Title Case and Sentence case first flatten everything to lowercase, so the original capitals (names, acronyms, the word “I”) are lost. Keep a copy of the original if you need it.
- After Sentence case, re-capitalise proper nouns and acronyms by hand.
- Title Case follows the “capitalise every word” style; if your style guide keeps short words like “a” and “the” lowercase, fix those afterwards.
Limits
- Word detection is based on plain English letters and digits. In Title Case, a word with an apostrophe becomes
Don'T, and accented letters may trigger a capital in the middle of a word (éLan). - Sentence case only recognises sentence ends marked by
.,!or?; a new line on its own does not start a new capital. - Only letters change; there are no options for snake_case, camelCase or kebab-case.
Saved in your browser
Nothing. The text exists only on the page.