Case Converter
This free case converter switches text between 12 cases, from Title Case for headlines to snake_case for code, in one click.
About
What Is a Case Converter?
A case converter changes the capitalization of text without retyping it. Paste a paragraph, choose a style, and copy the result, whether you need a headline in Title Case, a sentence fixed after Caps Lock, or a variable name for code.
To fix only the first letter of each sentence and leave everything else alone, use Auto Capitalize Sentences instead. To tidy spacing and hidden characters first, run the text through the text cleaner.
Guide
How to Use the Case Converter
Type or paste your text into the left box.
Choose a case. Each option shows a short example, so you can see what it does.
The converted text appears on the right as you type. Your original stays untouched, so switch cases freely.
Copy the result, download it, or select “Use as Input” to keep converting from there.
Features
Key Features
Upper and lower case
Convert uppercase to lowercase or lowercase to uppercase instantly, including accented letters like é and ß.
Title and sentence case
A title case converter that keeps short words like “of” lowercase, and a sentence case converter for headings and body text.
Code cases
A camelCase converter, snake case converter, and kebab case converter, plus PascalCase and CONSTANT_CASE.
Fun and fixes
An alternating case generator for memes, an inverse case to fix text typed with Caps Lock on, and Capitalize Each Word.
Use cases
Who It’s For
Writers and editors
Convert to title case for headlines, or fix text pasted in all caps.
Developers
Turn a label like “user profile ID” into userProfileId, user_profile_id, or user-profile-id.
Social media
Use it as a text case changer for bios, captions, and playful aLtErNaTiNg posts.
What’s the difference between Title Case and capitalize each word?
Title Case follows headline style: it keeps short words like “a”, “of”, and “the” lowercase unless they start the title or a sentence. Capitalize Each Word capitalizes every word without exception.
Does Title Case keep acronyms like NASA or iPhone?
Yes. Words that already contain capitals after the first letter are left as typed, so acronyms and brand names survive. Sentence case and lowercase do change them.
How are camelCase and snake_case built from normal text?
Each line is split into words at spaces, punctuation, and existing capital-letter humps, then joined in the chosen style. “user profile ID” becomes userProfileId, user_profile_id, or user-profile-id.