All tools
Case Converter
Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and more.
The conversion runs entirely in your browser — nothing is uploaded.
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Case Converter — frequently asked questions
What is Title Case vs Capitalize Each Word?+
Capitalize Each Word capitalises every word. Title Case follows style rules — small words like 'and', 'the', 'of' stay lowercase unless they are first or last.
Does camelCase / snake_case strip punctuation?+
Yes — programmer cases remove spaces and punctuation and join the words, since that is how identifiers are written.
Can I undo a conversion?+
Your original text stays in the top box, so you can re-run a different case at any time.
你们会把我的文件上传到服务器吗？+
不会——这里的每个工具都完全在你的设备上处理文件，不会向服务器上传任何内容。唯一的例外是 AI 工具，它们会把提取的文本（而非文件本身）发送给 Claude 来完成工作。
有文件大小限制吗？+
我们没有人为设置限制，但由于处理过程在你的浏览器中进行，非常大的文件（超过 500MB 或 1000 页）会受到你设备内存的限制，而非我们的限制。
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