// 免费在线工具
QR 码生成器
立即生成任何文本或 URL 的 QR 码。可自定义尺寸、颜色和纠错级别。下载 PNG 或 SVG - 所有操作在浏览器中完成，数据永不离开设备。
// 常见问题
常见问题
A QR（Quick Response）码 是一种二维条码，可存储文本、URL、联系人信息、Wi‑Fi 凭证等数据。1994 年由 Denso Wave 为追踪汽车零件发明，现已广泛用于移动友好链接、支付和信息共享。
任何现代智能手机摄像头都能扫描 QR 码，立即打开编码内容——大多数设备无需特殊应用。
您几乎可以编码任何文本数据：
- URL - 扫码后在浏览器中打开的网站链接
- 纯文本 - 消息、笔记或说明
- 电子邮件地址 - 使用
mailto:前缀 - 电话号码 - 使用
tel:前缀 - Wi‑Fi 凭证 - 使用
WIFI:格式 - vCard 联系人信息 - 一次扫描即可获取姓名、电话、邮箱
最大容量取决于纠错级别：最多 7,089 位数字字符、4,296 位字母数字字符或 2,953 字节二进制数据。
纠错功能使 QR 码即使部分损坏或被遮挡仍能被扫描：
- L 级（7%） - 最小 QR 码，适用于数字屏幕，损坏可能性低
- M 级（15%） - 大多数用途的良好默认值
- Q 级（25%） - 推荐用于可能磨损或脏污的印刷材料
- H 级（30%） - 最适合恶劣环境或计划在 QR 码上叠加徽标
更高的纠错级别会产生更密集的码，模块更多，因此请使用满足需求的最低级别。
QR 码规范支持至 40 版（177x177 模块），可存储数千字符。但数据越长，码越密集，尤其在小尺寸或低分辨率屏幕上更难扫描。
为获得最佳效果，请保持数据简洁。URL 可使用短链服务缩短。本生成器输出 100 至 500 像素的图像，适合屏幕显示和打印使用。
Yes. This QR code generator runs entirely in your browser using client-side JavaScript. The text or URL you enter is never sent to AtomnyX servers or any third party. The QR code is generated locally on your device using the open-source qrcode-generator library.
Your data exists only in your browser's memory and is discarded when you close the tab. No analytics, no tracking, no server-side processing.
Free Online QR Code Generator - Custom Colors, Sizes & Formats
This QR code generator creates scannable QR codes directly in your browser for any text, URL, or data you enter. It uses the open-source qrcode-generator library to produce standards-compliant QR codes with customizable error correction, sizing, and colors. Everything runs client-side - your data never touches a server.
Why Use QR Codes?
QR codes bridge the gap between physical and digital. Print one on a business card to share your website, on a restaurant menu to link to an online ordering page, on product packaging to provide setup instructions, or on event posters to link to ticket purchases. They eliminate the need for users to manually type long URLs and work instantly with any modern smartphone camera.
Customization Options
- Size: Adjust from 100px (compact, ideal for digital use) to 500px (large, ideal for printing). For print, use the largest size you can to ensure clean scanning at a distance.
- Error Correction: Choose between four levels (L, M, Q, H). Higher levels make the QR code more resilient to damage but also denser. Level M is a solid default for most uses.
- Colors: Pick custom foreground and background colors to match your brand. Ensure sufficient contrast between foreground and background for reliable scanning - dark foreground on light background works best.
Download Formats
PNG is a raster format ideal for web use, social media, and most printing needs. SVG is a vector format that scales to any size without losing quality - perfect for large-format printing, professional design work, or when you need the QR code at multiple sizes. Both formats are generated instantly in your browser.
Privacy - What We Collect
Nothing. QR code generation is entirely client-side. No network requests are made during or after generation. AtomnyX does not receive, log, or store your input data, your settings, or any information about your use of this tool. The only data that ever touches our servers is the initial page load.