Case Converter (Free): Uppercase, Lowercase, Title Case, Sentence Case

Accidentally typed everything in CAPS? Need clean Title Case for a headline? Or snake_case for code?

Paste your text below and choose a conversion.

Case Converter

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Welcome to the Case Converter Tool

This free online text tool helps you change letter case and formatting without retyping. Convert text to lowercase, UPPERCASE, Sentence case, Title Case, and more. It also supports developer-friendly formats like camelCase, snake_case, and kebab-case.

Case types

Sentence case

Sentence case turns your text into readable sentences. It capitalizes the first letter of each sentence and converts the rest to lowercase.

Example:
This is an example of sentence case.

lowercase

Lowercase makes every letter small. Handy when your text is accidentally shouting.

Example:
this is an example of lowercase.

UPPERCASE

UPPERCASE converts all letters to capitals.

Example:
THIS IS AN EXAMPLE OF UPPERCASE.

Capitalized Case

Capitalized Case makes the first letter of each word uppercase and the rest lowercase.

Example:
This Is An Example Of Capitalized Case.

Title Case

Title Case formats text like a headline. It capitalizes important words and keeps smaller words (like “and”, “of”, “to”) lowercase in most styles.

Example:
This Is an Example of Title Case.

aLtErNaTiNg cAsE

Alternating case switches between uppercase and lowercase letters.

Example:
tHiS Is aN ExAmPlE Of aLtErNaTiNg cAsE.

iNVERSE cASE

Inverse case flips letter case: uppercase becomes lowercase, and lowercase becomes uppercase.

Example:
tHIS iS AN eXAMPLE OF iNVERSE cASE.

tOGGLE cASE

Toggle case flips the case of each character (similar to inverse case). If your tool treats these differently, keep this label. If not, you can remove it.

Example:
hELLO wORLD

Developer-friendly formats

camelCase

camelCase removes spaces and capitalizes each new word after the first. Great for variable names.

Example:
thisIsAnExampleOfCamelCase

PascalCase

PascalCase is like camelCase, but the first letter is capitalized.

Example:
ThisIsAnExampleOfPascalCase

snake_case

snake_case uses underscores between words.

Example:
this_is_an_example_of_snake_case

SCREAMING_SNAKE_CASE

SCREAMING_SNAKE_CASE is snake_case in uppercase.

Example:
THIS_IS_AN_EXAMPLE_OF_SCREAMING_SNAKE_CASE

kebab-case

kebab-case uses hyphens between words.

Example:
this-is-an-example-of-kebab-case

Slugify

Slugify turns text into a clean URL slug by removing special characters and using hyphens.

Example:
this-is-an-example-slug

How to use the Case Converter

Paste or type your text into the input box.
Click the case you want (Sentence case, UPPERCASE, Title Case, and so on).
Copy the result or download it as a .txt file.

Perfect for

Fixing caps lock mistakes

Formatting headlines and blog titles

Cleaning up text for emails and documents

Standardizing product names and lists

Converting text for code: variables, constants, file names, URLs

Quick examples

Input: i CANT BELIEVE I DID THIS AGAIN
Sentence case: I cant believe i did this again
Title Case: I Cant Believe I Did This Again
lowercase: i cant believe i did this again
UPPERCASE: I CANT BELIEVE I DID THIS AGAIN
Inverse case: I cant believe i did this again

Privacy

Your text stays on your device. This tool converts text in your browser so you can format content without uploading it anywhere.

Frequently Asked Questions

What is a case converter?

A case converter is a tool that changes the capitalization of text, like converting to UPPERCASE, lowercase, Sentence case, or Title Case.

How do I change uppercase to lowercase?

Paste your text into the tool and click lowercase. The result updates instantly.

What’s the difference between Title Case and Capitalized Case?

Capitalized Case capitalizes every word. Title Case usually keeps smaller words (like “and”, “of”, “to”) lowercase unless they’re the first word.

Can I convert text into alternating case?

Yes. Click aLtErNaTiNg cAsE to switch between uppercase and lowercase letters throughout the text.

Does this tool support developer formats like camelCase and snake_case?

Yes. You can convert text to camelCase, PascalCase, snake_case, and kebab-case.

Can I download the converted text?

Yes. Use the Download button to save the result as a .txt file.

Does this work on mobile?

Yes. The tool works on desktop, tablet, and mobile browsers.