QR Code 生成器
免费在线二维码生成器，支持文本、URL、联系人等多种格式，可下载高清PNG图片。
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How to Use QR Code Generator
A QR code (Quick Response code) is a two-dimensional barcode that can store a wide variety of information including URLs, plain text, contact details, Wi-Fi credentials, and more. Our free QR Code Generator creates high-resolution QR codes instantly in your browser — no account required, no watermarks, and no data sent to any server. The generated QR code can be downloaded as a transparent PNG and used anywhere: product packaging, business cards, posters, presentations, or digital content. QR codes are readable by virtually any smartphone camera app, making them a universally accepted bridge between physical and digital worlds.
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Enter your content
Type or paste the text, URL, or data you want to encode into the input field.
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Customize (optional)
Adjust the error correction level or size if needed for your use case.
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Download
Click the Download button to save the QR code as a high-resolution PNG image.
Frequently Asked Questions
What types of content can I encode in a QR code?
You can encode URLs, plain text, email addresses, phone numbers, SMS messages, Wi-Fi credentials, vCards, and more.
How large should a QR code be to scan reliably?
As a rule of thumb, the QR code should be at least 1 cm × 1 cm for every 10 cm of scanning distance. For most print uses, 2.5 cm × 2.5 cm is a safe minimum.
Is the generated QR code permanent?
Yes. Since the data is encoded directly into the image, the QR code works forever as long as the destination URL or content is still accessible.