Generador de Código QR
Genera códigos QR para URLs, texto, redes WiFi, contactos vCard y más. Personaliza colores, tamaño y nivel de corrección de errores. Descarga como PNG o SVG. 100% en el navegador.
Enter data to generate QR code
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What is a QR Code?
A QR (Quick Response) code is a two-dimensional barcode that can store various types of data including URLs, contact information, WiFi credentials, and plain text. First invented in 1994 by Denso Wave for tracking automotive parts, QR codes are now ubiquitous in marketing, payments, authentication, and daily life. They can be scanned by any smartphone camera, making them the most accessible bridge between physical and digital worlds. This generator creates QR codes entirely in your browser — no data is sent to any server.
How to Use This QR Code Generator
- Select the data type: URL, WiFi, vCard, Email, Phone, SMS, or Text
- Enter the content for your QR code
- Customize the foreground and background colors to match your brand
- Adjust the size and error correction level (higher = more resilient to damage)
- Preview the QR code in real-time as you type
- Download as PNG for print or SVG for scalable vector graphics
Frequently Asked Questions
Is my data safe when generating QR codes with this tool?
Yes. This QR code generator runs 100% in your browser using JavaScript. Your data (URLs, WiFi passwords, contact information) never leaves your device. No server requests are made, no cookies set, and no data is stored. You can verify this by monitoring your browser's network tab — zero outbound requests are made with your data.
What error correction level should I choose?
Error correction determines how much of the QR code can be damaged while still being readable. Level L (7%) is fine for digital screens. Level M (15%) is the default and works for most printed materials. Level Q (25%) is good for codes that might get partially covered. Level H (30%) is best for codes printed on rough surfaces or that will include a logo overlay.
How do I create a WiFi QR code for guests?
Select 'WiFi Network' as the data type, enter your network name (SSID), password, and encryption type (WPA/WPA2 is most common). The generated QR code, when scanned by a phone, will automatically prompt the user to connect to your WiFi network without manually typing the password. This is perfect for restaurants, offices, and Airbnb properties.
What is the difference between PNG and SVG downloads?
PNG is a raster image format — good for sharing online, embedding in documents, or printing at the generated size. SVG is a vector format that can be scaled to any size without losing quality, making it ideal for large prints, banners, or professional designs. For most uses, PNG at 300px or higher is sufficient.
Can I customize the colors of my QR code?
Yes. You can change both the foreground (dark modules) and background colors. However, ensure sufficient contrast between the two colors for reliable scanning. Dark foreground on light background works best. Avoid very light foreground colors or very dark backgrounds, as this reduces scan reliability.
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