Convert text to uppercase, lowercase, title case, sentence case, camelCase, PascalCase, snake_case and kebab-case.
Changing text capitalisation by hand is tedious. Whether you need to convert ALL CAPS to normal case, format a variable name as snake_case, or clean up randomly capitalised CSV data, Thumbnail Download's Case Converter solves it instantly. Paste your text, click a format button, and copy the result in under three seconds.
lowercase converts everything to lowercase — ideal for URL slugs and normalising input. UPPERCASE converts to capitals — useful for headings and constants. Title Case capitalises every word's first letter. Sentence case capitalises only sentence starts. camelCase produces myVariableName — standard in JavaScript and Java. PascalCase produces MyVariableName — used for class names. snake_case produces my_variable_name — standard in Python and databases. kebab-case produces my-variable-name — standard for CSS classes and URL slugs.