Case Converter
Convert Unicode text to upper, lower, title, or sentence case.
Your input stays on this device and is processed in your browser.How to use Case Converter
- Paste, write, or insert up to 250,000 characters in the editor.
- Choose a locale-aware capitalization style.
- Undo or redo transformations, edit the result, and copy it.
Consistent capitalization
Changing case sounds like a per-letter operation and is not: it depends on the language. Turkish has a dotless lowercase i, German has an eszett that upper-cases into two letters, and a naive conversion gets both wrong. The conversion here is locale-aware, so Polish diacritics come back as Polish diacritics.
Title case is the one with no single correct answer. Which small words stay lowercase differs between style guides and differs again between languages, so treat the result as a starting point and read it once — a title is short enough to fix by hand.
Sentence case capitalizes after sentence-ending punctuation, which means an abbreviation with a full stop in the middle of a line will start a new sentence that was never there. It is the price of not needing a dictionary.
Frequently asked questions about Case Converter
Which styles are available?
You can select uppercase, lowercase, title case, or sentence case with Unicode-aware casing.
Can I recover the previous text?
Yes. Undo and redo keep up to twenty conversion states in the current tab.
Is my text stored?
No. The converter keeps text and its temporary history only in the current browser tab.