Generate QR codes from any text or URL instantly. Preview and download as PNG — free online QR code generator with no watermark and no signup required.
QR Code Generator is a free online tool that creates Quick Response (QR) codes from any text, URL, or data you provide. QR codes are two-dimensional barcodes that can be scanned by smartphone cameras to instantly open links, display text, or trigger actions. This tool generates high-quality QR codes in PNG and SVG format with customizable size, colors, error correction level, and margin. All generation happens client-side using the qrcode library, so your data is never sent to any server.
Use the QR Code Generator whenever you need to create a scannable code for sharing URLs, contact information, Wi-Fi credentials, or any text-based data. It is particularly useful for creating marketing materials, business cards, event tickets, product packaging labels, restaurant menus, and quick-access links for presentations. The instant preview and download functionality make it ideal for rapid prototyping and one-off QR code creation tasks.
Marketers and developers use QR Code Generator to create scannable links for social media campaigns, generate Wi-Fi network sharing codes, produce event check-in codes, create app download links for mobile applications, embed payment URLs for invoices, link physical products to their digital manuals, generate codes for inventory tracking systems, and create quick-access URLs for conference presentations and workshop materials.
Essential terms and definitions related to QR Code Generator.
A two-dimensional matrix barcode that stores data in a grid of black and white squares. QR codes can encode URLs, text, contact information, Wi-Fi credentials, and more. Unlike linear barcodes, QR codes can be scanned from any angle and include built-in error correction that allows partial damage recovery.
QR codes include redundant data that allows them to remain scannable even when partially damaged or obscured. Four levels exist: L (recovers 7% damage), M (15%), Q (25%), and H (30%). Higher correction enables logo overlays but produces denser codes. Level M is the default balance between size and resilience.
The individual black or white square unit that makes up a QR code grid. The total number of modules determines the QR code version (V1 = 21×21 modules, up to V40 = 177×177 modules). More modules allow more data capacity but require higher print resolution for reliable scanning.
A QR code can store up to 4,296 alphanumeric characters or 7,089 numeric characters at the lowest error correction level. In practice, keeping content under 300 characters produces QR codes that are easy to scan with any mobile device.
This tool generates standard black-and-white QR codes optimized for maximum scan reliability. Custom colors and logo embedding can reduce scannability. The generated PNG can be further customized in an image editor if needed.
No. QR codes are simply encoded data — they do not expire. However, if the QR code contains a URL, the code will stop working if the URL becomes unavailable. The QR code itself has no expiration date.
The QR code is generated at a resolution suitable for both digital display and printing. The PNG output is crisp and scalable, making it suitable for use on websites, business cards, flyers, and other materials.
Common errors developers encounter and how to resolve them.
QR code won't scan: Insufficient Error Correction Level QR codes offer 4 error correction levels: L (7% recovery), M (15%), Q (25%), H (30%). A low level (L) produces a smaller QR code but is less resilient to partial damage or dirt. For print materials (business cards, posters), Q or H level is recommended. If a logo will be added, H level is mandatory since the logo effectively "damages" part of the QR code. This tool uses a balanced error correction level for optimal scannability.
QR code content too long: "Data too long" error or slow scanning QR code data capacity varies by error correction level: at H level, a maximum of ~1,273 alphanumeric characters can be stored. Long URLs, vCard data, or large text blocks produce a denser QR code that becomes harder to scan with mobile devices. Solution: use a URL shortener for URLs, or redirect the QR code to a landing page URL for large data. In practice, staying under 300 characters ensures reliable scanning on all devices.
QR code unreadable in print: Resolution and contrast issues A QR code that scans perfectly on a digital screen may be unreadable in print — this is usually caused by insufficient resolution, low contrast, or physical size issues. The minimum print size should be at least 2×2 cm. There should be at least 40% contrast between the background and the QR code — the most reliable combination is black code on a white background. For colored QR codes, using dark-colored modules on a light background improves scannability.