QR Code Generator

A QR code (Quick Response code) is a two-dimensional barcode that stores information in black and white square patterns. When scanned with a smartphone camera, it instantly provides access to the encoded data such as URLs, text, contact information, or other digital content. QR codes can store up to 4,296 alphanumeric characters and use Reed-Solomon error correction to remain scannable even when partially damaged.

Yes, our QR code generator is completely free with no hidden fees, registration requirements, or usage limits. You can generate unlimited QR codes, customize colors and sizes, download in multiple formats, and use them for both personal and commercial purposes without any restrictions.

Our generator supports multiple content types including plain text, website URLs, email addresses, phone numbers, SMS messages, WiFi network credentials, vCard contact information, and more. You can also create QR codes for social media profiles, event details, location coordinates, and app download links.

PNG is a raster format with fixed resolution, perfect for digital use and printing at specific sizes. SVG is a vector format that can be scaled to any size without quality loss, making it ideal for professional printing, large format displays, and responsive web design. SVG files are also smaller and load faster on websites.

Error correction allows QR codes to remain scannable even when partially damaged or obscured. We offer four levels: Low (7% recovery), Medium (15% recovery), Quartile (25% recovery), and High (30% recovery). Higher levels provide better damage resistance but reduce data capacity. Medium level is recommended for most use cases, while High is ideal for outdoor environments or harsh conditions.

For printing, the minimum recommended size is 2x2 cm (0.8x0.8 inches) for close-range scanning like business cards. For posters and flyers, use at least 512x512 pixels. For large format printing like billboards, use 1024x1024 pixels or SVG format. The scanning distance rule is approximately 10:1 - if scanning from 1 meter away, the QR code should be at least 10cm wide.

Yes, you can customize both foreground and background colors. However, ensure sufficient contrast for reliable scanning - dark foreground on light background works best. Avoid light colors like yellow or pastels for the foreground, and never use inverted colors (light on dark) as most scanners cannot read them properly. Always test your colored QR codes on multiple devices before using them.

Absolutely. All QR code generation happens locally in your browser using client-side JavaScript. Your content is never transmitted to our servers or stored anywhere. The QR codes exist only in your browser session, ensuring complete privacy and security for sensitive information like WiFi passwords or personal contact details.

Common scanning issues include insufficient size (too small for scanning distance), poor contrast between colors, damaged or distorted code, insufficient lighting, or camera focus problems. Ensure your QR code is at least 2x2 cm for close scanning, has high contrast (dark on light), includes the white border (quiet zone), and is printed on flat, non-reflective surfaces. Test with multiple devices and scanning apps.

QR codes can store up to 4,296 alphanumeric characters, 7,089 numeric characters, 2,953 bytes of binary data, or 1,817 Kanji characters. However, practical limits are lower due to error correction overhead and scanning reliability. For best results, keep URLs under 300 characters and text content concise. Longer content makes the QR code more complex and harder to scan.

Static QR codes (like those generated by our free tool) cannot be edited after creation - the content is permanently encoded. To change the content, you need to generate a new QR code. Dynamic QR codes (offered by premium services) can be edited because they contain a redirect URL that can be updated, but this requires ongoing subscription services.

Static QR codes generated with our tool never expire and will work indefinitely as long as the encoded content (like URLs) remains valid. The QR code itself is just an image that encodes data - it cannot "break" or expire. However, if the content it points to (like a website) becomes unavailable, the QR code will lead to a dead link but the code itself remains functional.

Yes, QR codes generated with our tool can be used freely for commercial purposes including marketing campaigns, product packaging, business cards, advertisements, and more. There are no licensing fees or restrictions on commercial use. The QR code technology itself is open standard, and our generator creates standard-compliant codes that can be used anywhere.

Test your QR code on multiple devices (iPhone, Android) using both built-in camera apps and dedicated QR scanner apps. Test at various distances and lighting conditions similar to where it will be used. Print a small test version first to verify scanning works on paper. Check that the destination URL loads correctly and displays properly on mobile devices. Consider testing with older smartphones to ensure broad compatibility.

Select "WiFi Network" from the content type dropdown, then enter your network details in this format: WIFI:T:WPA;S:NetworkName;P:Password;H:false;; Replace "NetworkName" with your actual WiFi name and "Password" with your WiFi password. The "T" parameter specifies security type (WPA, WEP, or nopass for open networks). When scanned, most smartphones will automatically prompt to connect to the network.