二维码生成器QR Code Generator
在线生成二维码图片，支持自定义样式Generate QR code images online with customizable styles.
关于 二维码生成器About QR Code Generator
二维码能把链接、文本、Wi-Fi 配置等信息编码成可扫描的图形，是线上线下连接的入口。本工具在线生成二维码，支持自定义尺寸、颜色与边距，生成结果可直接下载，用于打印物料、网页展示或产品包装。QR codes encode links, text, Wi-Fi configs and more into scannable graphics — the bridge between offline and online. This tool generates QR codes online with customizable size, colours and margin; results can be downloaded for print materials, web pages or packaging.
使用方法How to Use
- 输入要编码的链接或文本内容。Enter the link or text to encode.
- 按需调整尺寸、前景色、背景色等参数。Adjust size, foreground and background colours as needed.
- 页面实时预览二维码效果。Preview the QR code in real time.
- 点击下载保存 PNG 图片文件。Click download to save the PNG image.
常见问题FAQ
二维码能存多少内容？How much content can a QR code hold?
内容长度决定二维码的版本（密度）：内容越长图案越密，对扫描设备的要求也越高。建议链接尽量简短（可先使用短链接服务）。Content length determines the QR version (density): longer content means a denser pattern and higher scanning requirements. Keep links short (a URL shortener helps).
改颜色或加 Logo 会影响扫描吗？Do colours or a logo affect scanning?
二维码自带纠错能力，可容忍一定遮挡与配色变化，但需保证前景与背景有足够对比度，且遮挡面积不宜过大。QR codes include error correction and tolerate some occlusion and recolouring, but keep strong foreground/background contrast and avoid covering too much area.
生成的二维码会过期吗？Do generated QR codes expire?
二维码本身只是图片，永不过期；能否扫出内容取决于目标链接是否仍然有效。A QR code is just an image and never expires; whether it works depends on whether the target link remains valid.
生成的二维码可以商用吗？Can I use generated QR codes commercially?
可以。生成过程完全在本地完成，无版权与数量限制；二维码标准本身是开放的国际标准（ISO/IEC 18004）。Yes. Generation is entirely local with no copyright or quantity limits; the QR standard itself is an open international standard (ISO/IEC 18004).
内容太长扫不出来怎么办？What if the code cannot be scanned because the content is too long?
二维码容量有限，内容越长矩阵越密、越难扫描。建议缩短文本或用短链接；用于印刷等耐损场景时可选择更高纠错等级。QR capacity is finite; longer content means a denser, harder-to-scan matrix. Shorten the text or use a short link, and choose a higher error-correction level for damage-prone printed scenarios.
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