About the Case Converter
Typed a paragraph with Caps Lock on, or need a heading in proper title case? Tezmy's Case Converter changes the case of any text instantly. It covers everyday writing styles like Sentence case and Title Case, plus developer formats like camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE. Title Case keeps short words like “and”, “of” and “the” lowercase, the way style guides recommend.
Updated October 2026
How to use the Case Converter
- 1Type or paste your text into the box.
- 2Click the case you want, for example Title Case or UPPER CASE.
- 3Not happy with the result? Press Undo, or try another case.
- 4Copy or download the converted text.
Every case style, explained
- Sentence case: only the first letter of each sentence is capital. The normal style for paragraphs and most headings on the web.
- lower case and UPPER CASE: everything small or everything capital. UPPER CASE is useful for short labels, but whole paragraphs in capitals read like shouting.
- Title Case: main words start with a capital, while short words like “a”, “of” and “the” stay small. Used for book, film and article titles.
- Capitalized Case: every single word starts with a capital, including the small ones.
- aLtErNaTiNg and InVeRsE: playful styles for memes and messages.
- camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE: naming styles used in programming, file names and URLs.
Fix text typed with Caps Lock on
It happens to everyone: you look up and a whole paragraph is in capitals. Paste it here and choose Sentence case. The text is turned back to normal, with a capital letter at the start of each sentence. Names and places will be small afterwards, so give them a quick check before you copy the result.
Title Case for headings and titles
Style guides like AP and Chicago recommend Title Case for titles, with short words such as “and”, “or”, “in” and “the” left lowercase unless they are the first word. This tool follows that rule, so “the lord of the rings” becomes “The Lord of the Rings”. For blog headings, many websites now prefer Sentence case, which feels friendlier and is easier to read.
Case styles for developers and URLs
Programming languages have their own naming habits: camelCase for JavaScript variables, PascalCase for class names, snake_case in Python and databases, CONSTANT_CASE for fixed values and kebab-case for CSS classes and web addresses. Paste a phrase or a list and convert it in one click. To turn a title into a clean web address, the Slug Generator also removes accents and symbols. If the text also has stray line breaks, clean them with Remove Line Breaks first, and count the result in the Word Counter.
Features
- 12 text cases in one place
- Smart Title Case that keeps minor words small
- Sentence case fixes “i” to “I”
- Developer cases: camel, Pascal, snake, kebab, constant
- One-click undo
- Copy and download buttons
Frequently asked questions
What is the difference between Title Case and Capitalized Case?
Capitalized Case capitalises the first letter of every word. Title Case follows style-guide rules and keeps short words such as “a”, “and”, “of” and “the” lowercase unless they start or end the title.
What is Sentence case?
Sentence case makes everything lowercase except the first letter of each sentence, like normal writing. It also turns a lone “i” into “I”.
What are camelCase and snake_case used for?
They are naming styles used in programming. camelCase joins words and capitalises each word after the first (myVariableName). snake_case joins words with underscores (my_variable_name). kebab-case uses dashes and is common in URLs.
Can I convert text from Caps Lock back to normal?
Yes. Paste your text and choose Sentence case. It lowercases everything and capitalises the start of each sentence.
Is my text stored anywhere?
No. The conversion happens in your browser and your text is never uploaded.
How do I change text to uppercase?
Paste your text and click UPPER CASE. Every letter becomes a capital, and you can copy the result with the Copy button.
Does it work on my phone?
Yes. Paste text from any app into the box, choose a case and tap Copy to paste it back wherever you need it.
Does the case converter change my punctuation?
No. Only the letters change between capital and small. For the developer styles, spaces and punctuation are replaced by the style's separator, like _ or -.