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Why this runs on your computer

There is no upload: The work happens in this tab. Your file never travels, so there is no copy of it anywhere but your own disk.
Nothing to delete later: Sites that upload promise to delete your file afterwards. That promise only matters because the file was theirs to hold.
It works with the Wi-Fi off: The honest test. Turn off your connection and the tools keep working, because everything they need is already here.

Case converter: upper, lower, title, sentence and more

Change text to upper, lower, title or sentence case - or a code style - here in this tab, with nothing uploaded.

How to case converter

Paste your text.
Pick the case you want.
Copy the result.

Why this one stays private

A quick fix should not mean sending the text away. It is converted here, in the tab, and nothing leaves it.

Questions

How does Title Case treat small words?

Articles, short conjunctions and prepositions stay lower case unless they open or close the title, as most style guides ask.

Which code styles are there?

camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE.

Does it handle accents?

Yes - accented letters change case correctly in every language.