Case Converter

Change text to uppercase, lowercase, title case, sentence case or programming styles like camelCase and snake_case — instantly.

0 characters

Runs entirely in your browser — nothing you type is sent anywhere.

About the Case Converter tool

Accidentally typed a paragraph with Caps Lock on? Need a headline in proper Title Case, or a variable name in camelCase? Retyping is slow and error-prone. Case Converter changes the capitalisation of any amount of text with a single click.

Twelve styles are available. Sentence case capitalises the first letter of each sentence. Title Case follows common style-guide rules, keeping short words like “and”, “of” and “the” in lower case unless they start the title. Developer formats convert each line separately and split words intelligently, so “user account ID” becomes userAccountId, user_account_id or user-account-id.

How to change text case

  1. Paste or type your text into the box.
  2. Click the case style you want — the text is converted immediately.
  3. Try a different style at any time; you can switch back and forth.
  4. Copy the result or download it as a .txt file.

Why use Wartatren.biz.id Case Converter?

12 case styles

Everyday formats and programming conventions in one place.

Smart Title Case

Minor words stay lower-case for headlines that look professionally edited.

Code-ready output

camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE for developers.

Works offline

Conversion happens in your browser — fast and private.

When is it useful?

Fix text typed with Caps Lock, format blog headlines and email subject lines, standardise product names in a spreadsheet, create URL slugs in kebab-case, or rename variables when moving code between languages. Check the length of your text afterwards with the Word Counter.

Frequently asked questions

What is the difference between Title Case and Capitalise Each Word?

Title Case keeps small words such as “a”, “and”, “of” and “the” in lower case (unless they are first), like a newspaper headline. Capitalise Each Word capitalises every single word.

What is Sentence case?

Only the first letter of each sentence is capitalised, plus the pronoun “I”. Proper nouns may need a manual touch afterwards.

What are camelCase and snake_case?

They are naming styles used in programming. camelCase joins words with capitals (myVariableName), while snake_case joins lower-case words with underscores (my_variable_name).

Is there a text length limit?

No practical limit — the converter handles long documents instantly.