Free Case Converter

Every case format in one place

• UPPERCASE / lowercase — the basics, one click each.
• Title Case — capitalizes each major word, standard for headings and titles.
• Sentence case — capitalizes only the first word, the modern default for web headings.
• aLtErNaTiNg cAsE and InVeRsE cAsE — for stylized or meme-style text.
• camelCase and PascalCase — for JavaScript/Java variable and class names.
• snake_case — for Python variables and database columns.
• kebab-case — for URLs, CSS classes, and file names.
• CONSTANT_CASE and dot.case — for constants and namespaced keys.

Who uses a case converter?

Writers use it to standardize headings across a document. Developers use it to quickly reformat a variable name or a batch of labels into the naming convention their codebase expects, without retyping everything by hand.

List and cleanup tools too

Beyond case conversion, the same tool can turn plain lines into a bullet or numbered list, flatten a list back into a paragraph, strip extra spaces, and remove empty lines — handy when cleaning up pasted text from a PDF or email.

Works with the rest of your text toolkit

The case converter shares its text box with Toolioh's word counter, character counter, and grammar checker — convert the case, then immediately check the length or run a grammar pass without leaving the page.

A text case changer online for any format

Use it as a simple capital letter converter to turn lowercase to uppercase or an uppercase to lowercase converter in one click. It also works as a sentence case converter, an invert case text tool for stylized text, and — for developers — a camel case converter online or a snake case converter tool when you need to reformat variable names or make text all caps for a heading.