Text Case Converter
UPPER, lower, Title, Sentence case.
Overview
Convert your text between UPPERCASE, lowercase, Title Case, and Sentence case in one click. The tool covers the simple cases plain text editors miss: capitalizing the first letter of every word, capitalizing only the first letter of each sentence, or flipping the case of every character.
Writers normalizing headlines from inconsistent sources, editors fixing all-caps user submissions, developers cleaning up display labels, and copywriters comparing formatting variants all use a case converter. It's a small operation that saves a lot of cursor-shuffling in a word processor.
How it works
Each mode follows simple rules. UPPERCASE: every letter becomes its uppercase equivalent. lowercase: every letter becomes lowercase. Title Case: the first letter of each word is uppercase, the rest lowercase. Sentence case: the first letter after each sentence-ending punctuation is uppercase, everything else lowercase. The tool uses Unicode-aware case mapping so non-ASCII letters (Á, Ç, Ñ) convert correctly.
For nuanced title case that follows style-guide rules (lowercasing short articles and prepositions), see the dedicated Title Case Converter.
Examples
Input: the QUICK Brown Fox
UPPERCASE: THE QUICK BROWN FOX
lowercase: the quick brown fox
Title Case: The Quick Brown Fox
Sentence: The quick brown fox
Input: hello world. how are you?
Sentence: Hello world. How are you?
FAQ
What's the difference between Title Case here and the Title Case Converter?
This tool capitalizes the first letter of every word. The dedicated Title Case Converter follows style guides (APA, Chicago, AP, MLA) that lowercase short articles, conjunctions, and prepositions.
Does it handle non-English letters?
Yes. Unicode case mapping is built in, so German ß, Turkish dotted/dotless I, and accented characters all convert correctly.
Why does Sentence case lowercase my proper nouns?
It doesn't know which words are names. Sentence case operates on punctuation, not part-of-speech. Touch up proper nouns by hand after running it.