Case Converter
UPPER, lower, Title and Sentence case.
Runs entirely in your browser. Nothing you enter or upload leaves your device.
What the case converter does
This tool changes the capitalisation of text in one click. It handles everyday styles such as UPPER CASE, lower case, Title Case and Sentence case, plus the naming styles programmers use for variables, files and settings, such as camelCase and snake_case.
It saves retyping when a heading was written in capitals, a pasted paragraph arrived in the wrong case, or a list of labels needs turning into code-friendly names. There are twelve styles, and the result updates as you type.
How to use the case converter
- Paste or type your text in the left box.
- Pick a case: UPPER, lower, Title Case, Sentence case, Capitalize Each Word, a programmer case such as camelCase, PascalCase, snake_case, kebab-case or CONSTANT_CASE, or iNVERSE and aLtErNaTiNg for fun.
- Copy or download the converted text from the right box. Use Use result as input to chain conversions. The page remembers the case you picked last.
Tips
Title Case, Sentence case and Capitalize Each Word put the rest of each word in lower case, so an acronym such as NASA becomes Nasa, and Sentence case also removes the capitals from names. Sentence case capitalises the first letter of each line and the first letter after a full stop, question mark or exclamation mark, and turns a lone “i” into “I”. Check proper nouns afterwards.
Programmer cases drop punctuation and keep letters and digits, including accented letters. To turn a title into part of a web address instead, use the slug generator, which also removes accents.
Questions
How does Title Case decide which words stay lowercase?
Short articles, conjunctions and prepositions (a, an, the, and, but, or, of, in, on, to, by, via and similar) stay lowercase unless they are the first or last word of a line. Style guides differ, so check headlines that must follow a specific guide.
What is the difference between Title Case and Capitalize Each Word?
Title Case keeps short words such as “of” and “the” in lower case in the middle of a line. Capitalize Each Word gives every word a capital.
What do camelCase, snake_case and kebab-case do with punctuation?
They split the text into words at spaces, punctuation and existing capital letters, then join the words with the chosen style. Each line is converted separately.
Does it work with other languages?
Yes, for scripts that have upper and lower case. It uses your browser’s locale rules.
Does my text leave this device?
No. The conversion happens in your browser and the text is not saved.