Change capitalization for text or code
The case converter changes text to uppercase, lowercase, title case, sentence case, camelCase, PascalCase, snake_case, or kebab-case. Use the writing styles for a quick capitalization pass, or the code styles to turn a label into a compact identifier while preserving separate lines.
Capitalization and identifier examples
Make a simple heading
Input
a little cleanup
Result
A Little Cleanup
Choose Title Case to capitalize each word. Short words such as a, of, and the are capitalized too. This is a predictable mechanical conversion, so make any style-guide exceptions yourself after copying the result.
Turn a label into camelCase
Input
Customer account number
Result
customerAccountNumber
Choose camelCase for a lower-initial identifier. PascalCase starts the first word with a capital instead. Code styles remove separators between words, but the result should still be checked against the naming rules of your language.
Create a snake_case field name
Input
Shipping postal code
Result
shipping_postal_code
Choose snake_case to join lowercase words with underscores. Choose kebab-case for hyphens instead. These styles work on each line separately, which makes them useful for converting a column of field labels without merging the column.
How to convert letter case
- Paste your text or open a text file. If you have several labels, place each on its own line so code-style conversion keeps their boundaries.
- Select the desired Style in Tool options. The output updates automatically unless you have disabled Update as I type.
- Review proper names, acronyms, punctuation, and non-English text. Mechanical capitalization cannot know which spelling your project or style guide requires.
- Copy or download the converted text. Keep the original if you might need to restore capitalization later; changing case is not generally reversible.
Questions about case conversion
Does title case follow a publishing style guide?
No. Title Case capitalizes each word rather than applying AP, Chicago, or another editorial rule set. It does not preserve small words in lowercase. This makes the result consistent, but titles still need editorial review.
What is the difference between camelCase and PascalCase?
Both join words without spaces and capitalize later words. camelCase begins with a lowercase word, while PascalCase begins with a capital. These are common naming conventions, but the converter does not validate that a name is legal in a programming language.
Can sentence case understand abbreviations and names?
No. Sentence case uses punctuation-based rules, not language understanding. Acronyms and proper names may lose their original capitals. Check abbreviations and sentence boundaries yourself, especially when the source has unusual punctuation.
Where is my text processed, and what is the limit?
Conversion runs in your browser and does not upload your input or opened file. The tool is free, has no ads, and requires no Data Pass. The input limit is 10 MiB, with additional safeguards for very large results and slow conversions.
Capitalization still needs a human check
The converter is not a grammar checker, translator, or naming validator; it cannot infer brand spellings or restore capitalization lost in an earlier conversion.