Case Converter
Transform text to UPPERCASE, lowercase, Title Case, camelCase, snake_case, or kebab-case with one click.
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How to Use the Case Converter
Paste your text, then click the case button you need: UPPERCASE, lowercase, Title Case, Sentence case, or camelCase.
About This Tool
Different contexts demand different capitalization. Developers need camelCase for JavaScript variables, snake_case for Python and database columns, kebab-case for CSS classes and URL slugs, and CONSTANT_CASE for environment variables. Writers need Title Case for headlines and Sentence case for body text. Data analysts cleaning imported spreadsheets often need to normalize inconsistent casing across thousands of rows. This tool handles all standard formats instantly: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, kebab-case, and PascalCase. Paste your text, click the format you need, and copy the result. Pair with the Word Counter for text statistics or Remove Duplicates for list cleanup.
Frequently Asked Questions
Does the Case Converter keep a copy of the text I convert?
No. The Case Converter applies the selected transformation (UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, or Sentence case) entirely in your browser. Your input and output stay in the page’s memory only — there is no localStorage persistence, no server round-trip, and no analytics event that includes the text content.
How much text can I paste into the Case Converter at once?
There is no enforced character limit — the Case Converter handles input of any length that fits in your browser’s memory. In practice, inputs of several million characters still convert instantly because the transformations are O(n) string operations. For extremely large documents (20MB+ of text), you may notice a brief pause on paste, but the conversion itself is fast.
How do I convert text between different cases?
Paste or type your text into the input box, then click one of the seven case buttons: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, or kebab-case. The output appears instantly in the preview area with a one-click Copy button. You can swap input and output direction to re-transform the result if needed.
What is the difference between camelCase and PascalCase?
camelCase starts with a lowercase letter and capitalizes each subsequent word: myVariableName. PascalCase (also called UpperCamelCase) capitalizes every word including the first: MyVariableName. In JavaScript, camelCase is conventional for variables and functions; PascalCase is used for class names and React components.
When should I use kebab-case vs snake_case?
kebab-case (words-separated-by-hyphens) is standard for CSS class names, HTML attributes, and URL slugs. snake_case (words_separated_by_underscores) is conventional in Python, Ruby, and SQL database columns. The choice is usually dictated by the language or framework you are working in.
Created by The Toobits Team · Engineering & Editorial
Toobits is built, tested, and maintained by a small independent engineering team. Every tool is written in TypeScript, runs entirely in the browser, and is reviewed against its source formulas before publication.
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