QR Code Generator - Custom QR Codes with Colors & Download
Quick Response (QR) codes are 2D matrix barcodes designed to bridge the physical and digital worlds. Mobile devices scan QR codes to open URLs, connect to secured Wi-Fi networks without typing passwords, or authenticate two-factor logins. This generator renders vector-crisp QR codes instantly in your browser with adjustable Reed-Solomon error correction to ensure scannability even on damaged prints.
When to Use This Tool
- Mobile Website Testing: Instantly beam local development URLs (localhost/staging) to mobile test devices for UI QA.
- Guest Wi-Fi Access Sharing: Create a scan-to-join QR code for home or office Wi-Fi networks with WPA2/WPA3 security.
- Event Marketing & Business Cards: Generate high-resolution vector QR codes for print flyers, posters, brochures, and vCards.
- 2FA Authentication Secrets: Test and render TOTP setup QR codes for authenticator apps like Google Authenticator.
How to Use
- Enter Content: Type or paste your destination URL, Wi-Fi credentials, or text message.
- Adjust Styling: Customize foreground and background colors ensuring high contrast for scanners.
- Set Error Correction: Choose Error Correction Level (L: 7%, M: 15%, Q: 25%, H: 30% recovery capacity).
- Download Image: Save your generated QR code as a PNG raster image or crisp SVG vector file.
Input & Output Example
Input:
URL: https://www.zezelab.xyz, ECC Level: H (High)
Output:
Generated 2D Barcode (Version 3, 29x29 matrix, 30% Reed-Solomon redundancy)
Frequently Asked Questions (FAQ)
Q. What is Error Correction Level (ECC)?
A. QR codes use Reed-Solomon error correction. Level H allows the QR code to be scanned successfully even if up to 30% of the symbol is obscured or damaged, which is ideal if you plan to embed a central brand logo.
Q. Do generated QR codes ever expire?
A. No. These are static QR codes where the actual text/URL is directly encoded into the binary matrix. As long as your destination link is active, the QR code will work permanently.
Q. Why won't my custom-colored QR code scan?
A. Scanners require adequate brightness contrast between dark modules and light backgrounds. Inverted colors (light QR on dark background) or low contrast colors (yellow on white) often fail to read.
Engineering & Privacy Notes
- Generates standard ISO/IEC 18004 compliant QR codes completely within browser canvas.
- Zero tracking or redirection: users navigate directly to your destination with full privacy.
Related Developer Tools
- URL Encoder: Safely encode query parameters embedded into QR codes.
- Color Converter: Find high-contrast palette colors for accessible QR designs.
- Image Compressor: Compress downloaded QR code PNGs for web delivery.
- Base64 Converter: Convert generated QR images into Data URIs for inline HTML.