把网址、文本或 WiFi 信息变成二维码：可调尺寸、纠错等级和颜色，下载 PNG 或 SVG。生成的静态二维码永久有效，不经过任何服务器、不带追踪。Turn URLs, text or WiFi credentials into QR codes: adjustable size, error-correction level and colors, downloadable as PNG or SVG. These are static codes — valid forever, generated locally with no tracking.
静态二维码说明：二维码里直接编码了内容本身，不依赖任何短链服务，所以永远不会过期；代价是内容不能再改——要改内容就重新生成一张。打印使用请选 1024 尺寸和 Q/H 纠错等级。Static QR codes encode the content itself and never expire or depend on a redirect service — the trade-off is the content cannot be changed afterwards; regenerate instead. For print, use size 1024 and error correction Q or H.