What is a Text Case Converter?
A text case converter lets you instantly reformat any block of text into a different capitalization style. Whether you accidentally typed a paragraph with Caps Lock on, need a headline in title case, or want to convert variable names into snake_case, it saves you from manually retyping everything.
This tool runs entirely within your browser — fast, private, and requiring no account. Your text never leaves your device.
Available Formatting Modes
Choose from a full suite of formatting options:
- Sentence case: Capitalizes only the first letter of each sentence. Great for fixing poorly formatted articles.
- lower case / UPPER CASE: Converts all characters to lowercase or uppercase in one click.
- Capitalized Case: Capitalizes the first letter of every word — useful for book titles and headlines.
- Developer cases: Supports
camelCase,PascalCase,snake_case, andkebab-casefor formatting variable names and identifiers. - Alternating & Inverse Case: Staggers capitalization on every letter — great for memes and internet humor.
Frequently Asked Questions
What does a case converter do?
It automatically reformats the capitalization of any text you paste in. You can convert to lowercase, UPPERCASE, Title Case, or developer-friendly formats like camelCase and snake_case — all without retyping a single character.
How do I convert UPPER CASE to lower case?
Paste your uppercase text into the input box, select "lower case" from the dropdown, and the converted text appears instantly in the output panel — ready to copy.
Is it safe to paste sensitive text here?
Yes. All processing happens locally in your browser using JavaScript. No data is ever uploaded, saved, or transmitted to any server.