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二维码生成器

为文本或链接生成二维码并下载 PNG。

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Updates live as you type. Test the code before printing.

About this tool

将链接、Wi-Fi 信息、纯文本或联系方式在几秒内变成可扫描的二维码。全部在浏览器本地生成，编码的数据不会上传到任何服务器。

Why use it

  • 可调分辨率，同一张码在名片或海报上都清晰可读。
  • 透明、无水印 PNG，可直接放入设计文件。
  • 页面加载后可完全离线使用 — 适合现场 Wi-Fi 不稳定的活动。

Common use cases

  • 在餐厅桌上链接数字菜单，无需安装 App。
  • 在包装上放置打开说明书或保修页的二维码。
  • 在胸牌和传单上分享活动签到链接。

Tips

  • 尽量缩短 URL — 字符越少，二维码越简单、越可靠。
  • 在码周围留出白色边距，便于扫描器快速识别。
使用方法
  1. 输入文字或链接。
  2. 调整尺寸滑块。
  3. 生成后下载 PNG。
常见问题
Are my QR codes uploaded anywhere?
No. The code is drawn in your browser with JavaScript, so the link or text you encode never leaves your device.
What can I store in a QR code?
Links, plain text, Wi-Fi logins, email, phone numbers, SMS and contact (vCard) details are all supported.
Can I download the code for print?
Yes. Export a high-resolution PNG or a vector SVG that stays sharp at any size, from a business card to a poster.
Why does a longer link make a denser code?
More characters need more data modules. Short URLs produce simpler patterns that scanners read faster and more reliably.
Can I add a logo or change the colors?
Yes, you can set foreground and background colors and drop a logo in the center. Keep enough contrast so the code still scans.
Will the QR code expire?
No. The code is static and encodes your data directly, so it works forever as long as the destination link stays live.

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