Case Converter

A case converter is a tool that rewrites your text in a different letter case — such as UPPERCASE, lowercase, Title Case, or Sentence case — without you having to retype it. CleanTextly's version also converts to identifier styles like camelCase, PascalCase, snake_case, and kebab-case.

Paste your text into the input box, pick a style from the Conversion Mode dropdown, and the converted text appears in the output box instantly. Nothing is uploaded and there's nothing to install.

Uppercase (capitals) writes every letter in its large form, like THIS. Lowercase writes every letter in its small form, like this. Switching between them only changes the letters — numbers, punctuation, and spacing stay exactly as they were.

Yes. Choose UPPERCASE to turn lowercase text into capitals, or lowercase to turn capitals into small letters. Both work on a single word or a whole document at once.

Title case capitalizes the first letter of each word, like "Total Monthly Revenue". This tool capitalizes every word and lowercases the rest of each one, so it also fixes inconsistent capitalization. It does not apply style-guide rules that keep short words like "of" or "the" lowercase.

Sentence case capitalizes the first letter of each sentence and makes everything else lowercase, so "the FIRST line. the second line." becomes "The first line. The second line." New sentences are detected after a period, question mark, exclamation mark, or line break. It will not re-capitalize proper nouns or a standalone "I".

camelCase starts with a lowercase letter, e.g. totalMonthlyRevenue. PascalCase capitalizes every word including the first, e.g. TotalMonthlyRevenue.

For UPPERCASE, lowercase, Title Case, and Sentence case, only the letter casing changes — line breaks, punctuation, numbers, and spacing are all left untouched. camelCase, PascalCase, snake_case, and kebab-case are applied to each line separately so line breaks stay in place, but they do remove spaces and punctuation within a line, since those aren't valid in identifiers.

Yes. Messy input like "hELLo WoRLD" is normalized to the correct word boundaries instead of carrying the random capitalization through into the result.

Yes. Paste text from Word, Excel, Google Docs, a PDF, or anywhere else — it's treated as plain text and only the letter casing is changed. Formatting like bold, fonts, or colors isn't carried over, since the tool works with plain text only.

No. All conversion happens locally in your browser. Your text is never sent to a server or stored.