Case Converter Online Free
Convert text between uppercase, lowercase, title case, sentence case, camelCase, and snake_case instantly.
About this tool
How to convert text case
Paste your text into the box and pick a case. The converted result appears immediately, ready to copy. The original stays in the box, so you can try several styles without pasting again.
The cases and where they belong
UPPERCASE shouts. It is right for short labels and acronyms, and wrong for sentences. Capitalised text is measurably slower to read, because the word-shape cues that fluent readers rely on disappear.
lowercase strips capitals entirely. Useful for normalising data before comparing it, and for a deliberately informal tone.
Title Case capitalises each significant word and is the convention for headlines and book titles in most English style guides.
Sentence case capitalises only the first letter of each sentence. Most modern publications and interfaces use it for headings, because it reads faster and feels less shouty than Title Case.
camelCase, snake_case and kebab-case exist for programmers. JavaScript variables are camelCase, Python and SQL favour snake_case, and URLs and CSS class names use kebab-case. Search engines treat hyphens as word separators and underscores as joiners, which is why hyphens win in web addresses.
Why do this in a converter rather than by hand
Retyping introduces typos, and fixing case in a spreadsheet or an editor means remembering a formula or a keyboard shortcut you use twice a year. Converting a list of headings, a set of database column names or an imported CSV takes seconds here and cannot mis-key a letter.
Frequently asked questions
Does Title Case follow a style guide?
It capitalises significant words and leaves short joining words lowercase, which matches common usage. Style guides differ on specifics, so check the result against yours for anything published.
Is my text uploaded?
No. The conversion runs in your browser.
Does it handle accented characters?
Yes. Case conversion uses your browser's Unicode rules, so accents and non-English alphabets are handled properly.
Is there a size limit?
No practical one for ordinary documents.
Written and maintained by Nudge Systems, Surat
Last reviewed