Case Converter
Convert text between uppercase, lowercase, title case, camelCase, PascalCase, snake_case, and kebab-case instantly with this free online tool. Perfect for developers normalizing variable names, writers formatting titles, or anyone who needs quick text case transformation. Runs entirely in your browser for privacy, handles special characters and numbers correctly, and supports batch conversion of multiple lines at once.
What is Case Conversion?
Case conversion is the process of transforming text from one capitalization style to another. While it sounds simple, different programming languages, style guides, and writing conventions each have their own case conventions. Developers use camelCase for JavaScript variables, PascalCase for class names, snake_case for Python and Ruby variables, kebab-case for CSS class names and URLs, and UPPER_CASE for constants. Writers use Title Case for headlines and Sentence case for body text.
A reliable case conversion tool understands all these conventions and can transform any text between them automatically. This eliminates the manual effort of retyping variable names when switching languages, formatting titles according to style guides, or preparing text for different parts of an application. The tool handles edge cases like apostrophes in contractions, numbers within words, and special characters that need to be preserved during conversion.
When Should You Use Case Conversion?
Case conversion is indispensable for developers working across multiple programming languages or frameworks. When migrating a JavaScript project to Python, variable names need to shift from camelCase to snake_case. When generating database column names from human-readable labels, converting to snake_case or UPPER_CASE is common. API designers often need to normalize field names to a consistent convention across endpoints.
Content creators and technical writers frequently use case conversion when formatting document titles, converting API endpoint names to user-friendly labels, or preparing content for different publishing platforms. SEO professionals convert keywords to match search intent patterns, and email marketers format subject lines according to style guidelines.
How It Works
The converter splits input text into individual words based on whitespace, hyphens, underscores, and camelCase boundaries (where lowercase transitions to uppercase). Each word is then reconstructed according to the target case rules. For camelCase, the first word is lowercase and subsequent words start with uppercase. For kebab-case, words are joined with hyphens in lowercase. For title case, each word is capitalized according to standard rules (with minor words like "the" and "and" optionally lowercased). Numbers are preserved in their original positions across all formats.
Tips for Best Results
When converting to camelCase or PascalCase, ensure your input text uses consistent word separators (spaces, hyphens, or underscores) for the cleanest results. For title case, note that most style guides have specific rules about which words to capitalize — when in doubt, capitalize all words for maximum clarity. Batch conversion of multiple lines works best when each line contains a single identifier or phrase rather than mixed content.
Features
How to Use
Paste or type your text into the input field
Select your desired case format from the available options
The converted text will appear instantly in the output area
Click the copy button to save the result to your clipboard
Frequently Asked Questions
What case types are supported?
Does this work with special characters?
Can I convert multiple lines?
Is my text sent to a server?
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