Case Converter
Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and more with one click.
About the Case Converter
This free case converter changes the capitalization of any text with a single click. Paste your text, choose a style, and the converted version appears instantly, ready to copy. It supports nine formats: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case and the playful aLtErNaTiNg case.
It is the fastest way to fix text typed with Caps Lock on, standardise headings to title case, or convert a phrase into a programming identifier. Developers use the camelCase, PascalCase, snake_case and kebab-case buttons to rename variables, JSON keys, database columns and URL slugs without retyping, while writers and editors use Sentence case to clean up copied headlines.
Everything runs locally in your browser, so long documents convert instantly and nothing is uploaded. The original text stays untouched in the input box, so you can try several styles and copy whichever result you need.
How to Use the Case Converter
- 1Paste or type your text into the input box.
- 2Click any case button — UPPERCASE, Title Case, camelCase and more.
- 3The converted text appears in the output box below.
- 4Click Copy to put the result on your clipboard.
Frequently Asked Questions
How do I convert uppercase text to lowercase?
Paste the text into the input box and click the "lowercase" button. Every letter is converted to its small form instantly and shown in the output box with a copy button. This is the quickest fix for text accidentally typed with Caps Lock on — no retyping needed, and punctuation and numbers are left unchanged.
What is the difference between Title Case and Sentence case?
Title Case capitalizes the first letter of every word ("How To Bake Perfect Bread"), which suits headlines and book titles. Sentence case capitalizes only the first word of each sentence ("How to bake perfect bread."), matching normal prose. This tool applies simple rules to every word; style guides like AP or Chicago may lowercase short words such as "to" or "the".
What are camelCase, PascalCase, snake_case and kebab-case used for?
They are programming naming conventions. camelCase (myVariableName) is common in JavaScript and Java; PascalCase (MyClassName) is used for class names in C# and TypeScript; snake_case (my_variable_name) dominates Python and SQL; kebab-case (my-page-url) is standard for URLs and CSS class names. The converter splits your text on spaces, punctuation and existing capital letters before joining it in the chosen style.
Can I convert a whole document at once?
Yes. There is no length limit — you can paste thousands of words and the conversion still happens instantly because all processing runs in your browser. Note that plain-text conversion removes no formatting, but if you paste from Word or Google Docs, only the raw text (not bold or fonts) is processed.