🔐 Base64 Encoder / Decoder
Convert text to and from Base64, with proper UTF-8 handling for CJK and emoji.
🔒 Everything runs locally in your browser. Files and content are never uploaded.
About this tool
浏览器原生的 btoa 处理中文会报错，这里用 TextEncoder 做了正确的 UTF-8 转换，中文、Emoji、生僻字都能正常往返。