Generate high-resolution custom QR codes instantly.
Create crisp, ready-to-scan QR codes for websites, Wi-Fi networks, vCards, SMS, and JSON payloads. Customize color palettes, error correction, and download vector SVG or HD PNG files.
Enter data to generate QR
https://jsonglow.com
01 · Modern Matrix Generation
Vector-quality QR codes built in your browser.
Whether you need an instant Wi-Fi login placard for your office, a scannable contact card for a conference badge, or a vector SVG for print packaging, JSONGlow's QR Code Generator gives you pixel-perfect results.
Choose from high-contrast designer color palettes, adjust quiet zone margins, select error correction levels (up to 30% damage recovery), and download in vector SVG or high-res PNG up to 2048px.
Every byte is generated locally with zero network calls, ensuring your private credentials and payloads stay completely secure.
02 · Capabilities
Everything you need for physical & digital scanning.
Multi-Preset Support
Create QR codes for URLs, Wi-Fi passwords, contact vCards, emails, SMS, plain text, and JSON.
Vector SVG & 2048px PNG
Export infinitely scalable vector SVGs or print-ready 2048px HD PNG images with one click.
Configurable Error Correction
Choose from Low (7%), Medium (15%), Quartile (25%), or High (30%) Reed-Solomon recovery.
100% Client-Side Privacy
No analytics or server roundtrips. Your Wi-Fi keys, phone numbers, and payloads never leave your browser.
03 · FAQ
Quick answers.
How does the QR Code Generator work?+
The generator creates standard ISO/IEC 18004 QR codes in your browser using pure JavaScript and HTML5 Canvas. It encodes data into a 2D matrix with Reed-Solomon error correction for maximum readability.
Can I download high-resolution QR codes for print?+
Yes! You can download crisp vector SVGs (infinitely scalable without pixelation) or ultra-high-definition PNGs up to 2048px (ideal for billboards, flyers, packaging, and business cards).
What data formats are supported?+
You can generate QR codes for website URLs, Wi-Fi auto-login credentials, contact vCards (address book), email mailto links, SMS/phone triggers, plain text, and JSON data structures.
What is Error Correction Level (ECC)?+
Error correction allows QR codes to be read even if partially dirty, damaged, or obscured. Levels range from Low (7% recovery) to High (30% recovery). Higher levels ensure reliable scanning in physical environments.
Are my QR codes or private Wi-Fi passwords sent to any server?+
Never. All encoding and image generation runs 100% locally in your browser. Zero data or credentials leave your device.
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