Kiến thức cơ bản về QR
Độ dài nội dung ảnh hưởng lớn tới khả năng quét.
Intro
QR codes encode text into a grid of modules. Longer data means denser modules, which are harder to scan in real‑world lighting and distance.
Preparation
Define the scan distance and placement first. It helps you choose size, contrast, and error correction.
Steps
Keep URLs short, choose a balanced error‑correction level, and preserve a clear quiet zone around the code.
Example
A small café shortened its review URL and increased size to 3–4cm, improving scan rates immediately.
Mistakes
Common mistakes include long URLs, low contrast, and placing QR codes on busy backgrounds.
blog.posts.qr-code-basics.sections.checklist.title
- Short, trusted URL
- Strong contrast
- Clear quiet zone
- 3cm+ print size
- Test on multiple devices
Operations
Use a standard template so every location prints the same size, margin, and color settings.
Aftercare
Check printed materials regularly for damage or fading and replace when needed.
Tips
Prioritize readability over decoration. Consistency across locations improves trust and scan success.
FAQ
What data should I encode?
Use a URL that leads to a safe destination. Avoid encoding sensitive data directly.
What size is recommended?
At least 2.5–3cm for standard print; larger for distance.
Should I always use high error correction?
Not always. Higher levels reduce capacity and can make dense codes harder to scan.
Tóm tắt
- Nội dung ngắn
- Dùng HTTPS
- Thử nhiều thiết bị
Sẵn sàng tạo QR?
Áp dụng hướng dẫn và tạo QR ngay. Nên xem thêm các chính sách liên quan.