Unicode Escape Converter

Convert between Unicode escapes and readable text
Examples:
Escape: Hello → \u0048\u0065\u006c\u006c\u006f
Unescape: \u0048\u0065\u006c\u006c\u006f → Hello
Escape: 你好 → \u4f60\u597d
Unescape: \u4f60\u597d → 你好