QR Code Generator

A QR (Quick Response) code is a two-dimensional matrix barcode developed in 1994 by the Japanese company Denso Wave. Unlike traditional linear barcodes that only read horizontally, QR codes encode information both vertically and horizontally. This allows them to store up to 100 times more data, including website links, plain text, email addresses, phone contact cards, and Wi-Fi network credentials.

A static QR code encodes the target data (like a website URL) directly into its pixel pattern. Once printed, the data cannot be edited because changing it would require changing the pixel layout. A dynamic QR code encodes a redirect short link hosted by a server. If you need to edit the target URL later, you can update the redirect endpoint on the server without changing the printed QR code's layout.

Wi-Fi QR codes encode network configurations using a specific syntax schema: `WIFI:S:NetworkName;T:WPA;P:Password;;`. When scanned by a modern smartphone (iOS or Android), the operating system recognizes the schema, parses the SSID, encryption type (e.g. WPA/WEP), and password, and prompts the user to join the Wi-Fi network instantly without typing passwords.

No, static QR codes generated by our tool never expire. Since the data is written directly into the pixel structure, the code will remain functional indefinitely as long as the target website URL is active or the plain text remains relevant. We do not charge fees, redirect your traffic, or track your scans.

For print marketing materials (like business cards, brochures, packaging, and posters), ensure the QR code is printed at a resolution of at least 300 DPI (Dots Per Inch) and is at least 2cm x 2cm in size. Maintaining a high contrast (such as dark black pixels on a solid white background) ensures older mobile cameras can scan it.

Yes, you can customize QR code colors, but you must maintain a high contrast ratio between the foreground pixels and the background background. If you use light colors (like yellow or light gray) on a white background, camera sensors will struggle to distinguish the squares, rendering the code unscannable. Keep contrast high.

Yes, our generator is completely secure. All calculations and pixel matrix maps are computed locally in your web browser using JavaScript libraries. Your Wi-Fi passwords, personal text, and target URLs are never sent over the internet or uploaded to any database, ensuring 100% confidentiality.

Our QR Code Generator supports several data types: website URLs (the most common use case), plain text (great for business card info, instructions, or event details), email addresses (opens a new email when scanned), phone numbers (opens the dialer), and SMS messages. For WhatsApp-specific scan-to-chat codes, use our dedicated WhatsApp QR Generator which formats the wa.me link automatically.

A static QR code encodes your data directly into the pixel pattern — it's permanent, free, and never expires. A dynamic QR code encodes a short redirect URL on a server; the destination can be changed later, but it requires a paid subscription and stops working if the provider shuts down. For most creators and small businesses, static QR codes are the reliable and free choice.

The minimum safe print size is 2 × 2 cm (about 0.8 inches). Smaller than this, older phone cameras may fail to scan reliably. For large-format printing like banners or posters, scale the downloaded PNG up proportionally and maintain a white quiet-zone margin around all four edges of the QR grid to ensure reliable scanning.