Case Converter - English Case / Full-width Half-width
Free case converter. Convert English between UPPER, lower and Title Case locally, plus full-width/half-width. 100% local, text never uploaded.
About 文本工具
Convert English case and full/half-width locally. This tool runs entirely in your browser locally — no file upload, your privacy is protected, and speed is unaffected by network.
FAQ
Will my files be uploaded?
No. All processing happens locally in your browser; files never leave your device.
Which formats / scenarios are supported?
case converter, english case, upper to lower, full width half width, letter case and more can be done on this page.
Do I need an internet connection?
After the page loads, conversion/computation runs locally and works offline (except features relying on external fonts/libraries).