Case Converter
Transform text between UPPERCASE, lowercase, Title Case, camelCase, snake_case, and more.
Click any card to copy that conversion. Use the button to replace the text in the input above.
About this tool
Convert text between twelve common cases — UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case, aLtErNaTiNg, and iNVERSE — with one click per conversion. Each card shows a live preview so you can see the result before you copy.
The Case Converter handles common edge cases: title case follows AP-style article and preposition rules; sentence case capitalises after each terminator; programming cases strip punctuation cleanly. Useful for renaming database columns, normalising form input, or converting between language conventions.
Like every tool in the toolkit, the Case Converter shares its input with the other tools. Paste a paragraph of source text and switch tabs to count words or check readability without re-pasting.
Frequently asked questions
What is title case?
A capitalisation style where the first letter of each major word is capitalised. Articles (a, an, the), short prepositions (of, in, on), and conjunctions (and, but) are lowercased — except as the first word. AP, Chicago, and MLA differ on details (e.g. AP capitalises prepositions of 4+ letters).How do you convert text to camelCase?
Remove spaces and punctuation, lowercase the first word, and capitalise the first letter of every subsequent word. "user account name" becomes "userAccountName". Used widely for variable and function names in JavaScript, Java, and Swift.What is the difference between snake_case and kebab-case?
Both lowercase all words, but snake_case joins them with underscores (user_name) while kebab-case uses hyphens (user-name). Python and Ruby prefer snake_case for variables; CSS and URLs use kebab-case.What are the title case rules for articles and prepositions?
AP style: lowercase articles (a, an, the), conjunctions (and, but, or), and prepositions of 3 letters or fewer (in, of, to). Capitalise everything else, plus always the first and last word. Chicago style is similar but capitalises prepositions of 5+ letters.How do I convert uppercase to lowercase without retyping?
Paste your text into the toolkit and click the "lowercase" card — the conversion runs instantly and you can copy with one click. The shared text buffer means you can switch to other tools without re-pasting.