You can encode plain text URLs, email addresses, phone numbers, SMS messages, Wi-Fi credentials (SSID and password), vCard contact information, and calendar events.
Yes. QR codes can be downloaded as high-resolution PNG or SVG files. SVG is recommended for print as it scales to any size without pixelation.
Use Level M (15% damage tolerance) for standard digital use. Use Level H (30% damage tolerance) for printed QR codes that may be partially covered by a logo or experience physical wear.