Text Case Converter

What Is the Text Case Converter?

The text case converter transforms any text you paste in into a different capitalisation style with a single click. Whether you need UPPERCASE for headings, lowercase for normalising input, Title Case for proper nouns, camelCase for JavaScript variable names, snake_case for Python identifiers, or kebab-case for URL slugs and CSS class names, this tool handles all of them without any manual editing. You can switch between formats instantly and copy out the result ready to use in your code, content, or design work.

Letter case is defined in the Unicode standard and has specific rules that vary by language. The MDN documentation on JavaScript string case methods explains how case conversion works at the code level, including the locale-sensitive edge cases that affect certain languages like Turkish, where the lowercase of the dotted capital I differs from the standard lowercase i.

How to Use the Text Case Converter

1. Paste in your text or type in directly into the input field.
2. Click the button for the case format you want to convert to.
3. The converted text appears instantly in the output field.
4. Copy out the result with the copy button.
5. Switch between different case formats by clicking different buttons without re-entering your text.

For converting text into URL-friendly format, the Slug Generator handles the full conversion including removing special characters and replacing spaces with hyphens. The Text Case Converter is better suited for situations where you need to transform the case of text while preserving its other formatting.

Case Formats Supported

When Each Format Is Typically Used

Understanding which case convention applies in which context saves time and avoids naming inconsistencies in code, content, and design systems. In practice, most teams settle on a convention and stick to it, but it is useful to know why each convention exists:

• camelCase is the standard for variable and function names in JavaScript, Java, and many other languages. The first letter is lowercase and each subsequent word starts with a capital, which visually separates words without using any special characters.
• PascalCase follows the same pattern as camelCase but with the first letter capitalised. It is conventionally used for class names, React components, and TypeScript types and interfaces.
• snake_case uses underscores as word separators and is the dominant convention in Python for variables and functions, as well as in SQL for column names and table identifiers.
• kebab-case uses hyphens and is standard for CSS class names, HTML data attributes, URL slugs, and command-line flags.
• SCREAMING_SNAKE_CASE is used for constants in languages like C, Go, and JavaScript/TypeScript, where uppercase signals that the value should not be reassigned.

Title Case Rules and Exceptions

Title Case is one of the trickier formats because the rules vary depending on the style guide you are following. The general principle is to capitalise the first and last word of a title, all major words (nouns, verbs, adjectives, adverbs), and to leave short prepositions, conjunctions, and articles in lowercase unless they open the title. That said, different style guides, including APA, Chicago, MLA, and AP, have slightly different rules for which words get capitalised.

Beyond that, the tool applies a standard Title Case algorithm that handles the most common cases correctly. For titles that will be published formally, it is worth checking the specific style guide required by your publication or institution.

Conclusion

The text case converter handles all the manual reformatting work that adds up surprisingly quickly when you are working across code, content, and design. Paste in any text, switch between formats instantly, and copy out the result. It is especially useful when you are setting up naming conventions in a new project or normalising inconsistently capitalised input from multiple sources.