About This Free Case Converter Tool

This is a free online case converter that transforms text between 8+ different letter cases instantly. Whether you need to convert to uppercase for headers, lowercase for URLs, title case for titles, or programming conventions like camelCase and snake_case — this tool does it all in one click.

Supported Conversions

UPPERCASE — Convert all letters to capital letters (HELLO WORLD)
lowercase — Convert all letters to small letters (hello world)
Title Case — Capitalize the first letter of each word (Hello World)
Sentence case — Capitalize only the first letter (Hello world.)
camelCase — Programming style: first word lowercase, subsequent capitalized (helloWorld)
snake_case — Underscore-separated lowercase (hello_world)
kebab-case — Hyphen-separated lowercase (hello-world)
tOGGLE cASE — Invert each letter's case (hELLO wORLD)