Case Converter
Convert text to UPPER, lower, Title, Sentence, camelCase, snake_case, kebab-case and more in one click.
About Case Converter
This case converter online changes the letter case of any text in one click. Convert to UPPERCASE, lowercase, Title Case or Sentence case for writing, or to camelCase, PascalCase, snake_case and kebab-case for code and file names.
It saves you retyping text that was typed with Caps Lock on, fixes headings for documents and slides, and turns titles into variable names. Paste your text, pick a style and copy the result, or feed the output back in to convert again. The tool is free, needs no sign-up, and your text stays in your browser.
How to use Case Converter
- Paste your text in the input box.
- Pick a case style — the result updates instantly.
- Copy the result, or use it as the new input to convert again.
Frequently asked questions
Which words stay lowercase in Title Case?
Short articles, conjunctions and prepositions such as “a”, “and”, “of”, “in” and “the” stay lowercase unless they are the first or last word, following common headline style.
How are camelCase and snake_case built?
The text is split into words at spaces, punctuation and existing capital letters, then joined in the chosen style. Each line is converted separately, so you can convert a list of names at once.
Does Sentence case fix proper nouns?
No. Sentence case lowercases everything and capitalises the first letter of each sentence and the pronoun “I”. Names like “Mumbai” need to be capitalised again by hand.
How do I convert text to uppercase?
Paste your text and choose UPPERCASE; every letter is capitalised instantly and you can copy the result.
What is the difference between title case and sentence case?
Title case capitalises the main words of a heading. Sentence case capitalises only the first word of each sentence.
How do I fix text typed with Caps Lock on?
Paste it in and choose Sentence case or lowercase to convert it back to normal text.
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