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Paste anything — a heading, a column of names, an email that arrived in all caps — and flip it between eight cases. Title Case knows which small words stay lowercase, the code cases split camelCase and snake_case at real word boundaries, and the counts update as you type. It rebuilds capitals from scratch, so it will flatten an acronym rather than guess at one.
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The buttons convert whatever is in the box — including text you already converted, so the cases chain. Undo puts back what was there before the last one.
Character and word counts update as you type.
Title Case keeps a, an, the, of, in, on, for, to, and, or, nor and but lowercase unless one starts or ends a line, and treats each line as its own title. Sentence case capitalises after . ! ? and at the start of a line, and lowercases everything else. Both rebuild capitals from scratch — that is what lets them convert text arriving in all caps, and it means an acronym like NASA comes out as Nasa or nasa, so check those by hand. The code cases split on spaces, punctuation and existing case boundaries, one line at a time.
Paste into the editor or open a file — everything you add stays in this tab, and you see exactly what the tool will work on before anything runs.
Your browser does all the work locally. Nothing is uploaded — what you paste never leaves this tab, so there’s nothing for anyone to store, scan, or leak.
Take the result to your clipboard, or save it as a file. Close the tab and nothing of what you pasted remains.