QR 码生成器

从文本或 URL 生成 QR 码

最后更新:

关于此工具

QR 码生成器把 URL、名片、Wi-Fi 凭证或短文本变成手机相机可即时识别的方形条码。菜单、签到、双重验证设置、支付链接随处可见,无需装 App 即可连接现实与数字世界。

使用方法

  1. Type or paste the content you want to encode (URL, text, contact info, etc.).
  2. Adjust the size slider to balance scanability and the space you have available.
  3. Click Generate to render the QR code in the preview panel.
  4. Test by scanning with your phone camera before publishing.
  5. Download the PNG and embed it on a poster, menu, slide deck, or web page.

常见用例

  • Linking a printed menu directly to an online ordering page.
  • Sharing event Wi-Fi credentials so guests join without typing.
  • Generating a QR for a TOTP secret during 2FA setup.
  • Producing a vCard QR for business cards or conference badges.
  • Driving in-person traffic to a feedback survey or product page.
  • Adding a QR shortcut to a documentation page in slide decks.

常见问题

Q. How much data can a QR code hold?

A. Up to ~4,296 alphanumeric characters at the highest density. In practice keep it short: shorter URLs scan faster from a distance and tolerate more damage.

Q. What error correction level should I use?

A. Level M (15%) is a good default. Level H (30%) is recommended if you plan to overlay a logo or print on a surface that may scuff.

Q. Can I track scans?

A. A QR encodes a fixed string. To track scans, point it at a short URL or analytics-aware redirect that you control.

Q. Why do some QR codes have rounded dots?

A. Cosmetic. The QR spec only requires square modules; many generators offer styled variants but very stylised codes can fail on older scanners.