Case Converter

This free case converter changes the capital letters in your text with one click. Fix a heading typed with Caps Lock on, tidy up a title, or turn a phrase into a variable name for your code. The text never leaves your browser.

How to use the case converter

1. Type or paste your text into the box.
2. Click the style you want: UPPER CASE, lower case, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case or CONSTANT_CASE.
3. Check the result and press Copy.

Cases for writing

Many design systems now prefer sentence case for buttons and headings, because it reads more like normal speech. Title Case rules differ between style guides; some keep short words such as of, and and in in lower case. After converting, check names of people and places, such as Thanjavur or Priya, and short forms such as GST or HTML. No case converter can know that these need capitals, so fix them by hand.

Cases for code

Programmers cannot use spaces in names, so they join words in different ways. Each language and tool has its own habit:

A quick example: a product field called Delivery Pin Code becomes deliveryPinCode in JavaScript, delivery_pin_code in a Python script or SQL table, delivery-pin-code as a CSS class, and DELIVERY_PIN_CODE for a fixed setting. Paste the label once and copy each style as you need it, instead of retyping and risking a typo that breaks your code.

Being consistent matters more than which style you choose. Pick the convention your language or team uses and stick to it. Our lessons on JavaScript variables, Python variables and CSS variables and design tokens show these naming styles in real code.

Doing it in JavaScript

Upper and lower case are built into JavaScript with toUpperCase() and toLowerCase(). The other styles need a little code that splits the text into words and joins them again, which is what the case converter does for you:

const text = 'total order price';
const words = text.toLowerCase().split(' ');

console.log(words.join('_'));  // total_order_price
console.log(words.join('-'));  // total-order-price
console.log(words.map((w, i) => i ? w[0].toUpperCase() + w.slice(1) : w).join(''));  // totalOrderPrice

Learn more

• Word & Character Counter
• Lorem Ipsum Generator
• JavaScript Variables and Data Types
• Python Strings
• UX Writing: How to Write Microcopy for Buttons, Errors and Empty States
• 12 Typography Rules for UI Design (with Examples)

Frequently asked questions