Online Case Converter with 13 case formats for text and code

• Writing case formats

  Switch between UPPER CASE, lower case, Capitalized Case, and Sentence case for documents, headlines, and UI text.

• Inverse case

  Flip the case of every character instantly. Useful for fixing accidental CAPS LOCK text.

• Programming naming conventions

  Convert between camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE, dot.case, path/case, and space case for code and configuration.

• Real-time conversion

  The output updates instantly as you type, so you can see the result without pressing a button.

• Copy and clear

  Copy the converted text to your clipboard with one click, or clear both fields to start fresh.

• Keep data local

  All conversions are done in your browser. No text is sent to any server.

1. 1

   Type or paste your text into the input area.

2. 2

   The output updates instantly in the result panel.

3. 3

   Select a different case format from the grid to switch the conversion style.

4. 4

   Click Copy to grab the converted text, or Clear to start over.

• Use UPPER CASE for acronyms, warnings, labels, or emphasis in short text.
• Use lower case for casual writing, code comments, and consistent formatting.
• Use Capitalized Case for names, headings, and proper nouns in UI labels.
• Use Sentence case for body text, descriptions, and natural language paragraphs.
• Use camelCase for JavaScript variables, function names, and JSON keys.
• Use PascalCase for TypeScript classes, React component names, and C# types.
• Use snake_case for Python variables, database column names, and file names.
• Use kebab-case for URL slugs, CSS class names, and HTML attribute values.
• Use CONSTANT_CASE for environment variables, configuration keys, and enum values.

After normalizing casing, use Text Counter when titles, field names, or descriptions still need a length and byte check. If the source text contains rough spacing, line breaks, or invisible characters, clean it first with Text Cleaner ; when fixed words, prefixes, or field fragments need to change in bulk, move to Text Replace . For lists of variables, routes, enum values, or names, Line Tools is a better fit for dedupe, sorting, numbering, and splitting.

• Sentence Case only capitalizes the first word and proper nouns. The converter uses the first letter of the input as the sentence start.
• camelCase and PascalCase split on spaces, hyphens, underscores, and dots. They preserve digits and handle consecutive capitals intelligently.
• Inverse case flips each letter individually. It does not affect digits, symbols, or whitespace.
• For programming names, non-alphanumeric separators (hyphens, underscores, dots, slashes) are stripped and the next letter is capitalized where appropriate.

• Sentence Case relies on simple capitalization rules. It does not handle all proper noun exceptions or complex grammar rules.
• camelCase and PascalCase treat acronyms as regular words. ACRONYM becomes acronym during conversion unless you manually preserve it.
• Inverse Case does not convert non-alphabetic characters. Digits, symbols, and whitespace remain unchanged.
• Very long input texts may cause brief rendering pauses while the conversion is recalculated.
• This page does not perform spell checking, grammar checking, or language detection.