What is a QR code and how does it work?

A QR code (Quick Response code) is a two-dimensional barcode that stores information as a pattern of black squares on a white background. Unlike traditional barcodes that store data linearly, QR codes store data both horizontally and vertically, allowing them to hold much more information—up to 4,296 alphanumeric characters. When scanned with a smartphone camera or QR reader app, the code is decoded and the stored information is displayed or executed (like opening a URL, displaying text, or connecting to WiFi). QR codes use error correction algorithms, meaning they remain scannable even if partially damaged or obscured. They're widely used for contactless payments, marketing campaigns, product information, event tickets, business cards, and more.

What types of content can I encode in a QR code?

QR codes can encode various types of content including website URLs and links, plain text messages, email addresses with pre-filled subject and body, phone numbers for instant dialing, SMS messages with recipient and text, WiFi network credentials (SSID, password, encryption type), vCard contact information (name, phone, email, address), geographic coordinates for maps, calendar events, and social media profiles. The most common use is URL encoding for directing users to websites, landing pages, or app downloads. Each content type has a specific format that QR readers recognize and handle appropriately—for example, a WiFi QR code automatically prompts to join the network, while a vCard QR offers to save the contact.

Can I customize the appearance of my QR code?

Yes! Most QR code generators offer customization options including foreground and background colors (though maintain high contrast for scannability), adjustable size and resolution for different use cases (print vs digital), error correction levels to balance data capacity with damage resistance, and quiet zone (margin) around the code. Some advanced generators allow adding logos or images to the center, custom patterns for data modules, rounded corners instead of squares, and gradient color schemes. However, be cautious with extreme customization—overly complex designs, low contrast colors, or very small sizes can reduce scannability. Always test customized QR codes with multiple devices and scanner apps before mass production or distribution.

What's the difference between PNG and SVG format downloads?

PNG (Portable Network Graphics) is a raster image format that stores QR codes as a grid of pixels. It's universally supported, displays reliably across all devices and applications, and is perfect for digital use (websites, emails, presentations). However, PNG images can become pixelated when scaled beyond their original size. SVG (Scalable Vector Graphics) is a vector format that stores QR codes as mathematical shapes and paths. SVG files scale infinitely without quality loss, making them ideal for print materials, signage, large banners, and professional design software. SVG files are typically smaller in file size and can be easily edited in design tools. Use PNG for quick digital sharing and web use. Use SVG for professional printing and designs requiring scalability.

How do I ensure my QR code is scannable?

To ensure maximum scannability, follow these best practices: Maintain high contrast between foreground and background (black on white works best). Ensure adequate size—minimum 2x2 cm for print, larger for scanning from distance. Include the required quiet zone (white margin) around the code—typically 4 modules wide. Test the QR code with multiple smartphone cameras and QR reader apps before distribution. Avoid placing QR codes on curved, glossy, or textured surfaces that cause distortion or glare. Use higher error correction levels for codes that may get dirty or damaged. Keep encoded content concise—longer URLs create denser, harder-to-scan codes. For printed materials, use high-quality printing to avoid smudging or blurring. Never compress or resize QR code images in ways that introduce artifacts.

What is error correction level and which should I choose?

Error correction allows QR codes to remain scannable even when partially damaged, dirty, or obscured. There are four error correction levels: Low (L) recovers 7% of data, suitable for clean, protected environments and digital use. Medium (M) recovers 15% of data, balanced option for most use cases. Quartile (Q) recovers 25% of data, recommended for printed materials that may get worn or dirty. High (H) recovers 30% of data, best for codes that will be exposed to harsh conditions, outdoor use, or when adding logos/images. Higher error correction creates denser QR codes with more data modules, making them harder to scan at small sizes. Choose based on your use case: L/M for digital screens, Q/H for print and outdoor applications. If adding a logo, use Q or H level to accommodate the obscured center area.

Can I track how many times my QR code has been scanned?

Static QR codes generated by this tool cannot track scans because they contain the actual data (URL, text, etc.) and function without an intermediary service. Once created, they work independently forever, which is great for privacy but offers no analytics. To track scans, you need dynamic QR codes that redirect through a tracking service. Dynamic QR codes contain a short URL that redirects to your actual destination while logging each scan with metadata like time, location, device type, and operating system. Many third-party services offer dynamic QR codes with analytics dashboards. However, dynamic codes depend on the service staying online. For privacy-conscious applications or permanent installations, static codes are preferable despite lacking analytics.

How long do QR codes last and can they expire?

Static QR codes created with this tool never expire and last forever because they contain the actual encoded data, not a redirect link. As long as the physical medium (paper, sticker, sign) remains scannable and the linked content exists, the QR code functions indefinitely. The code itself doesn't degrade—only the physical medium or the linked resource can become unavailable. For URL-based QR codes, ensure the destination URL remains active. Avoid using temporary links, link shorteners that expire, or URLs that might change. Dynamic QR codes from third-party services may expire if you stop paying for the service or the service shuts down. For permanent installations (signage, monuments, packaging), use static codes with stable, long-term URLs to ensure longevity.

Is it safe to scan unknown QR codes?

Exercise caution when scanning unknown QR codes, as they can contain malicious URLs or trigger unwanted actions. QR codes themselves aren't inherently dangerous—they're just encoded data. However, they can link to phishing websites, malware downloads, or scam pages. Before scanning, consider the source and context. Legitimate QR codes appear in trustworthy locations (official posters, products, business cards). Be wary of codes on random stickers, graffiti, or unsolicited emails. Most modern smartphones preview the URL or action before executing it—always review this preview before proceeding. Don't enter sensitive information on sites reached via QR codes unless you verify the URL authenticity. Use QR scanner apps that check URLs against security databases. For sensitive operations (payments, login), manually type URLs instead of scanning codes.

Can I use QR codes for commercial purposes or marketing?

Yes! QR codes generated by this tool are completely free to use for any purpose, including commercial and marketing applications. There are no licensing fees, royalties, or usage restrictions. Common commercial uses include product packaging with links to instructions or videos, business cards with contact information or portfolio links, restaurant menus and contactless ordering, retail promotions and discount codes, event tickets and registration, real estate listings with virtual tours, print advertisements linking to landing pages, and product authentication or warranty registration. QR codes excel at bridging physical and digital marketing—they turn passive print materials into interactive experiences. For marketing campaigns, use analytics-enabled dynamic QR codes to measure effectiveness. Always include a short text URL alongside the QR code for accessibility and for users without smartphones.

Free QR Code Generator

Create custom QR codes for URLs, text, WiFi, vCards, and more. Download as PNG or SVG with customizable colors, sizes, and error correction. Perfect for marketing, business cards, and contactless sharing.

Input

Enter the text or URL you want to encode

Text or URL

Quick Samples

Settings

Customize your QR code appearance

Size: 256px

Error Correction Level

Download Format

Download Filename

QR Code

Your generated QR code

Enter text to generate QR code

QR Code Types

URLs

https://www.example.com

mailto:[email protected]

Phone

tel:+1234567890

SMS

sms:+1234567890:Message

WiFi

WIFI:T:WPA;S:Network;P:Password;;

Plain Text

Any text you want to share

QR Code Generator FAQ - Common Questions

Find answers to frequently asked questions about QR codes, generation, customization, error correction, scanning safety, and best practices for using QR codes effectively.

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