QR Code & Barcode Generator

Generate QR codes for URLs, text, and WiFi credentials, or create standard barcodes in common formats. Customize colors and size, then download as PNG or SVG — everything runs entirely in your browser.

QR Code & Barcode Generator

Tạo QR code và barcode tùy chỉnh cho URL, text hoặc bất kỳ dữ liệu nào. Hỗ trợ tạo hàng loạt với xuất PDF.

QR Code Settings

Khuyến nghị dùng Error Level Q hoặc H khi có logo

Preview
Tips

Error correction cao hơn giúp mã vẫn hoạt động khi bị hư hại

Tăng kích thước để scan tốt hơn ở khoảng cách xa

Dùng màu tương phản cao để đảm bảo độ tin cậy

Khi thêm logo, nên dùng Error Level Q hoặc H

Test QR code trước khi in

Công cụ liên quan

Tất cả công cụ

About QR Code Generator

Create QR codes for URLs, text, WiFi credentials, and contact information. Customize colors and sizes, then download in PNG or SVG format. Everything runs in your browser — no data is sent to any server.

Key Features

  • -Support for URLs, text, and WiFi data
  • -Customizable foreground and background colors
  • -Download as PNG or SVG
  • -Adjustable size and error correction level
  • -Works entirely offline after page load
  • -Batch mode for multiple codes

Use Cases

Marketing Materials

Add QR codes to flyers, posters, and business cards linking to your website or social profiles.

WiFi Sharing

Generate QR codes that let guests connect to your WiFi network without typing passwords.

Product Labels

Create scannable codes for inventory management or product information pages.

Event Tickets

Generate unique QR codes for event check-in and ticket verification systems.

Frequently Asked Questions

How much data can a QR code store?
Standard QR codes can store up to 4,296 alphanumeric characters. For URLs, keep them short for better scan reliability.
What is error correction level?
Error correction allows QR codes to remain scannable even when partially damaged. Higher levels (H) tolerate more damage but reduce data capacity.
Can I customize the colors?
Yes. You can set custom foreground and background colors. Ensure sufficient contrast between them for reliable scanning.
QR Code & Barcode Generator - Free Online | atdev.blog