Case Converter
UPPER, lower, Title, camelCase, snake_case and more.
How to use
- 输入文本后选择转换方式，结果实时自动处理。
- 「句首大写」将每个句子第一个字母转为大写，按 . ! ? 和换行断句。
- 「标题式大小写」对英文实词首字母大写，of/the/and 等虚词保持小写（居中词）。
- 中文、数字和标点不受影响。
SSS
Does Case Converter upload my data?
No. Processing stays in your browser and is not uploaded.
Do I need an account?
No. Open and use — no signup.
How is this different from upload-based tools?
Tools run locally in your browser; content is not sent to our servers for processing.
Are there limits?
Limited by device memory and the browser; very large inputs may slow the page.