Case Converter
Convert text to uppercase, lowercase, title case, sentence case, and more.
Paste your text and click a button to convert it to uppercase, lowercase, title case, sentence case, or other formats. This tool runs in your browser—no data is uploaded anywhere.
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What is Case Converter?
Case Converter is a free online tool that transforms text between different letter cases. It supports uppercase (ALL CAPS), lowercase (all small), title case (First Letter Capitalized), sentence case, and more. Useful for fixing text formatting quickly.
When Should You Use This Tool?
Use this tool when you need to fix text with incorrect capitalization, format titles and headers, convert code identifiers between cases, or standardize text formatting across documents.
How to Use Case Converter
- 1Paste or type your text into the input area.
- 2Click the button for the case conversion you want (Uppercase, Lowercase, Title Case, etc.).
- 3The converted text appears in the output area.
- 4Copy the result using the Copy button.
How Does This Tool Work?
This case converter uses JavaScript string methods to transform text locally in your browser. Each conversion type applies specific rules: uppercase converts all letters to capitals, title case capitalizes the first letter of each word, and sentence case capitalizes only after sentence-ending punctuation.
Privacy Note: Runs entirely in your browser. Your data never leaves your device. No file uploads to any server.
Common Use Cases
Writers
Format headings and titles correctly with title case.
Developers
Convert between camelCase, snake_case, and other code formats.
Marketers
Ensure consistent text formatting in campaigns.
Students
Fix accidental caps lock errors quickly.