Case Converter
Convert text between UPPER, lower, Title, camelCase, snake_case, kebab-case and 10 more formats instantly.
What is Case Converter?
A case converter is a text transformation tool that changes the capitalisation pattern of text without altering the words themselves. Text case has both practical and stylistic uses: UPPERCASE for headings and acronyms, lowercase for plain text, Title Case for book titles and proper nouns, Sentence case for readable body text, camelCase and PascalCase for programming variable names, snake_case and kebab-case for URLs and CSS class names, and CONSTANT_CASE for programming constants.
Manually changing case is tedious and error-prone, especially with long text. Copying a headline pasted in all-caps and converting it to Title Case, transforming a list of product names to lowercase for a database, or converting existing variable names from camelCase to snake_case all take seconds with a case converter but could take minutes by hand.
Altairys's Case Converter supports 10 different case transformations in one tool. Paste your text, choose the target case, and the conversion happens instantly. The tool handles edge cases correctly: camelCase correctly handles abbreviations (HTML becomes Html), snake_case separates on existing space and punctuation characters, and Title Case correctly skips small words like "a," "the," "and," "of" in the middle of a title following standard editorial rules.
How to Use Case Converter
- Paste your text
Type or paste the text you want to convert into the input area.
- Select target case
Click the button for the case you want: UPPER, lower, Title, Sentence, camelCase, etc.
- Copy the result
The converted text appears instantly — click Copy to grab it to your clipboard.
Key Benefits
Results appear immediately as you click the case button — no waiting.
UPPER, lower, Title, Sentence, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, and more.
camelCase, PascalCase, snake_case, and kebab-case conversions for programming needs.
Copy converted text to clipboard with a single click.
Frequently Asked Questions
Title Case capitalises the first letter of each major word. Small words like "a", "an", "the", "and", "but", "or", "for" are typically kept lowercase when in the middle of a title. Example: "The Quick Brown Fox Jumps over the Lazy Dog".
Sentence case capitalises only the first word of a sentence (and proper nouns). It is the standard capitalisation for regular text, emails, and most content. Example: "The quick brown fox jumps over the lazy dog."
camelCase is widely used in programming: JavaScript variables and functions (myVariableName), JSON property names, and React component props typically use camelCase.
Both join words without spaces, but camelCase starts with a lowercase letter (myVariable) while PascalCase starts with an uppercase letter (MyVariable). PascalCase is used for class names and React components.