Case Converter

What Case Converter does

Case Converter changes words, headings, labels, and identifiers between common naming styles. It covers uppercase, lowercase, title case, camelCase, snake_case, kebab-case, and sentence case. This is useful when moving text between design files, documentation, CSS classes, JavaScript variables, environment variables, database columns, and test names that all use slightly different conventions.

This page is designed for everyday developer work: quick checks while debugging, preparing small examples for documentation, and cleaning up data before pasting it into an editor, terminal, issue, or test fixture. The interface keeps the input, controls, output, and status message close together so the result is easy to verify before you copy it.

Private browser-based workflow

All processing happens with in-browser JavaScript. The tool does not upload your text, tokens, URLs, snippets, or generated values to a server, and it does not require an account. That privacy model is important because small utilities often receive real API responses, configuration samples, logs, authentication data, or customer-shaped examples during troubleshooting. Keeping the work local reduces risk and also makes the tool feel instant because there is no network round trip.

Practical tips

Automatic case conversion cannot know every acronym, brand name, or project-specific exception. Review output such as API, URL, ID, HTML, and product names before committing it. The word-based modes split punctuation, whitespace, underscores, hyphens, and camelCase boundaries, while uppercase and lowercase preserve the original separators.

Always review transformed output before relying on it in production. Browser utilities are excellent for inspection and preparation, but they cannot understand every project convention or security requirement. If the result will be committed, shared publicly, or used in an authentication flow, double-check that it contains no secrets and that it matches the format expected by your application.

Examples and behavior details

The input user first name becomes userFirstName in camelCase, user_first_name in snake_case, user-first-name in kebab-case and User First Name in title case. A camelCase identifier such as getUserID is split at its case boundaries into get, user and id, so snake_case returns get_user_id.

Some details are worth knowing. Title case capitalizes every word, including small words like “of” and “and”, so adjust those by hand if your style guide lowercases them. Sentence case lowercases the whole input and capitalizes only its first character; it does not detect later sentences or proper nouns. Because camelCase, snake_case and kebab-case rebuild the text from words, punctuation and line breaks are dropped and the result is a single line. A run of capitals followed by a word, like HTTPResponse, stays one word, because splitting happens only where a lowercase letter or digit meets a capital.