Case Converter
UPPERCASE, lowercase, Title Case, Sentence case, camelCase and more — one click.
Paste your text and convert it instantly between UPPERCASE, lowercase, Title Case, Sentence case, aLtErNaTiNg case, camelCase, snake_case and kebab-case. Ideal for fixing text typed with Caps Lock on, formatting headlines, preparing variable names for code, or generating URL slugs.
Title case, done properly
Good title case is more than capitalizing every word: minor words like "a", "of", "the" and "and" stay lowercase unless they start or end the title. This converter follows that convention automatically, so your headlines look professionally edited.
For writers and developers alike
Writers use sentence and title case for headlines and subject lines; developers use camelCase, snake_case and kebab-case for identifiers, filenames and URLs. One tool covers both worlds — and like all our text tools, your input never leaves your browser.
Which case belongs where
| Case | Used for |
|---|---|
camelCase | JavaScript and Java variables, JSON keys |
PascalCase | Class names in most languages, React components |
snake_case | Python variables and functions, SQL columns |
kebab-case | URLs, CSS classes, HTML attributes, file names |
UPPER_SNAKE | Constants and environment variables |
| Title Case | Headlines, article titles, book titles |
| Sentence case | UI labels, buttons, most modern interfaces |
Title Case is not "capitalise everything"
The rule most style guides share: capitalise the first and last word, and every word in between except short articles, conjunctions and prepositions — a, an, the, and, but, or, nor, for, at, by, in, of, on, to, up, with.
So it is "The Rise of the Machines", not "The Rise Of The Machines". Guides disagree on prepositions of four or more letters ("Between", "Through"), so pick one convention and stay consistent within a publication.
Why kebab-case for URLs
Hyphens are read as word separators by search engines; underscores historically were not, joining words into one token. A URL of /blog/how-to-write is understood as three words, while /blog/how_to_write risks being read as one. It is a small thing, but it costs nothing to get right and is painful to change later.
Frequently asked questions
What is the difference between title case and sentence case?
Title case capitalizes the main words of a phrase ("The Art of Clear Writing") while sentence case capitalizes only the first word and proper nouns ("The art of clear writing"). Title case suits headlines; sentence case suits body text and many modern publications.
What are camelCase, snake_case and kebab-case used for?
They are programming naming styles: camelCase joins words with capitals (userName), snake_case with underscores (user_name), and kebab-case with hyphens (user-name), commonly used for URLs and CSS classes.
Does the converter handle small words in titles correctly?
Yes. Articles, short conjunctions and short prepositions (a, an, the, of, and, or, in, on…) are kept lowercase in title case unless they are the first or last word.
Is my text stored anywhere?
No. Conversion runs entirely in your browser — nothing is sent to a server, logged or saved.