Online QR code generator: create a free QR code
Create a free QR code online for a URL, text, email or WiFi. Instant PNG/SVG download.
Published on January 10, 2026The QR code (Quick Response code) has become essential for quickly sharing information from a smartphone. Restaurant menus, business cards, advertising posters, e-commerce products or WiFi connections: a well-generated QR code improves user experience and facilitates access to information.
Understanding the conversion
A QR code is a two-dimensional barcode capable of storing up to 4,296 alphanumeric characters or 7,089 digits. It consists of black and white square modules on a white background, and integrates error correction (levels L, M, Q, H) that allows the code to be read even if partially damaged. The QR code version (1 to 40) determines its capacity and size. For professional use, choosing correction level H (30%) ensures readability even if the QR code is printed on a damaged surface.
📊 Conversion table
| Content type | Typical capacity | Use case |
|---|---|---|
| URL | Up to 4,000 chars | Website, social media, product page |
| Free text | Up to 4,296 chars | Description, instructions |
| Email (mailto:) | Address + subject | Direct contact |
| Phone (tel:) | International number | Direct call |
| WiFi (WIFI:S:...) | SSID + password + security | Easy network connection |
| vCard | Name, phone, email, address | Digital business card |
💡 Practical examples
Generate a QR code pointing to your online menu URL. Print at minimum 3×3 cm on a table card or window. Use correction level H for surfaces that may get stained.
Format: WIFI:S:NetworkName;T:WPA;P:Password;; — generate this QR code and display it at reception. Guests no longer need to type the password manually.
Encode your vCard (name, title, email, phone, website) in a QR code. Print it on the back of your business card. Minimum size: 2×2 cm for reliable scanning.