Developer & Text · Case Converter
Convert text to UPPERCASE, lowercase, Title Case or camelCase
Quick answer
Open Toolfox → Case Converter, paste your text and pick a case: UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, CONSTANT_CASE and more. The result updates as you type. It runs entirely on your computer (Mac, Windows or Linux). Files are never uploaded.
How to do it
- Open Case Converter.
- Paste or type text, or open a file.
- Choose the case in Options.
- Copy the result or Save… it.
Options you can set
- Convert to
- Keep small words lowercase
Good to know
- camelCase, snake_case and the other programming cases convert each line separately and drop punctuation.
- Title and Sentence case keep words that already mix capitals (iPhone) and acronyms (NASA) unless the text is mostly in capitals.
- Small-word and “I” rules are for English. Other languages are converted letter by letter, with full Unicode support.
Case Converter FAQ
Does Title Case keep small words lowercase?
Yes, by default words like “a”, “of” and “the” stay lowercase unless they start or end the title. These rules are for English.
Will it break names like iPhone or NASA?
No. Title and Sentence case keep words that already mix capitals and acronyms, unless the text is mostly in capitals.
What happens to multiple lines in camelCase?
camelCase, snake_case and the other programming cases convert each line separately and drop punctuation.
Is Case Converter in Toolfox free?
Yes. Case Converter is one of 57 tools in Toolfox, a free app for Mac, Windows and Linux with no account, ads, limits or watermarks.
Does Case Converter upload my files?
No. Toolfox processes files on your own computer and works offline; your files are never uploaded.
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Updated 2026-10-18 · Toolfox v0.2.1