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Case Converter | Text Case Formatter
Convert text to UPPERCASE, lowercase, Title Case, camelCase, PascalCase, snake_case, CONSTANT_CASE, or kebab-case with line-by-line conversion and one-click copy.
Enter text, then choose a conversion style.
Up to 50,000 characters. Conversion runs only in your browser.
Standardize naming in seconds
This case converter is designed for searches such as “camelCase converter,” “PascalCase converter,” and “snake_case converter.” Quickly normalize variable names, headers, JSON keys, and labels while editing code, documentation, or data fields.
Supported formats
- UPPERCASE
- lowercase
- Title Case
- camelCase
- PascalCase
- snake_case
- CONSTANT_CASE
- kebab-case
Existing compound words such as customerOrder and APIResponse are split before conversion. Use the input summary to check detected words, keep multi-line lists separate when needed, then copy the finished result with one click.
How to use it
1. Enter the source text
Paste or type up to 50,000 characters. Joined names, underscores, spaces, and punctuation are treated as word boundaries where possible.
2. Choose a naming style
Select the format you need. Turn on line-by-line conversion when each row should become its own variable or key.
3. Copy the result
Review the output, then use the copy button to paste it into code, documentation, or a spreadsheet.
Practical examples
Standardize API field names
Convert plain-language labels into camelCase or snake_case to keep API specifications and field names consistent.
Prepare environment variable keys
Convert setting names to CONSTANT_CASE for .env examples and deployment documentation.
Clean up titles and headings
Quickly normalize documents that mix uppercase, lowercase, and title-style capitalization.
Related tools
- Length checks: Text Counter
- Multi-line cleanup: Line Break Cleaner
- JSON key workflow: JSON Merge
- Case-style reference: MDN - Lexical grammar
FAQ
When should I use camelCase or snake_case?
Follow your project convention. camelCase is common for frontend and JavaScript variables, while snake_case is widely used for database columns and backend fields.
Can it convert Korean text?
Korean has no uppercase or lowercase distinction, so the selected case rules mainly affect English words.
Are special characters supported?
Most special characters are treated as word separators. Review the result when a symbol carries important meaning.
When should I use line-by-line conversion?
Use it for lists of field names, menu labels, tags, or headings when each line should stay separate after conversion.
Summary
The case converter reduces repetitive editing and helps keep code, documentation, and data fields consistent.