Creating a QR code takes about 60 seconds — open a QR generator, paste your URL or text, download the PNG. Before printing, always scan your own QR code with your phone to verify it goes to the right place. Using high error correction (M or Q level) means the code still works even if it gets slightly scuffed.

Quick answer: Open the QR code generator, enter your URL or text, choose 256px for digital or 512px+ for print, and download. Test by scanning with your phone before sharing or printing.

What is a QR code?

QR stands for Quick Response. It's a type of barcode that stores information as a pattern of black and white squares. Unlike traditional barcodes that only hold product numbers, QR codes can store:

A URL (most common)
A phone number
WiFi login credentials
Plain text
Contact information (vCard)
An email address

A smartphone's camera (no app needed on modern phones) can scan and instantly act on this information — opening a website, connecting to WiFi, saving a contact.

How do I create a QR code for a website link?

Open the QR code generator in your browser
Enter the URL
Choose the size (256px is good for digital; 512px for better quality)
Download the QR code as PNG

That's it. Test your QR code by scanning it with your phone before printing or sharing.

How do I create a QR code for WiFi sharing?

Creating a QR code for your WiFi means guests can scan it instead of typing a long password. Most QR generators support WiFi format:

Select WiFi type from the options
Enter your network name (SSID) and password
Select the security type (WPA2 for most modern routers)
Generate and download

You can print this and put it on your fridge or router. Guests scan it → instantly connected, no typing.

How do I create a QR code for contact information?

A QR code with your contact details (vCard format) lets people scan and save your number directly. Useful on business cards.

Enter:

Full name
Phone number
Email
Website (optional)

Generate the vCard QR code. When someone scans it, their phone offers to add you as a contact.

I printed a QR code for my WiFi password and stuck it on the router. No more guests asking "what's your WiFi?" or me trying to read out a 16-character random password. They scan, they're connected. Best 60-second project I've done.

What quality settings should I choose?

Size: Larger is better for print. The minimum printable size where QR codes scan reliably is about 2cm x 2cm (0.8 inches). For business cards, 3cm x 3cm is safer.

Error correction: QR codes have built-in error correction that lets them scan even when partially damaged or dirty. Levels:

L (Low) — 7% can be damaged, smallest code
M (Medium) — 15% can be damaged (good default)
Q (Quartile) — 25% — better if the code might get worn
H (High) — 30% — use when you expect damage (outdoor signs)

Higher error correction = slightly larger, more complex QR code. M or Q is good for most purposes.

How do I make sure my QR code actually works?

Before printing 500 business cards, test the QR code:

Download the generated image
Scan it with your phone's camera
Verify it goes to the right place
Test at different distances — does it scan from 30cm away? 1 meter?
If printing, print a test first and scan the physical printout

QR codes occasionally get corrupted if resized poorly or printed at very low resolution. Always test.

How do I scan a QR code?

iPhone: Open the Camera app and point it at the QR code. A notification appears — tap it to open the link.

Android: Open the Camera app. Most modern Android phones scan QR codes automatically. If yours doesn't, use Google Lens (the icon in the camera app) or install a free QR scanner app.

Browser (desktop): Some tools let you upload an image of a QR code and decode it — useful if you received a QR code image and can't scan it with your phone.

Should I trust QR codes I find in public?

QR codes are just links. A malicious QR code could direct you to a phishing website or trigger an action on your phone. The same rules as clicking links apply:

Safer:

QR codes in official publications, restaurant menus at the actual restaurant, product packaging
QR codes you generated yourself

Be cautious:

QR codes in unsolicited emails or text messages
QR codes stickered over existing ones (a real scam — scammers put their own QR codes over legitimate ones in parking meters, etc.)
QR codes on random posters you encounter

Before you tap a link from a QR code, glance at the URL it's about to open. If it looks suspicious — misspelled domain, random characters, unexpected domain — don't continue.

What's the difference between static and dynamic QR codes?

Static QR codes: The data is baked into the code. If you need to change the URL, you'd need to generate a new code. Free tools generate static codes.

Dynamic QR codes: The code points to a redirect service. You can change where the redirect goes without changing the code. Useful for things like business cards where you might change your website. Usually require a paid service.

For most personal uses, static codes are perfectly fine.

Common uses for QR codes

Restaurant and café menus (especially since 2020)
Business cards — link to your portfolio or LinkedIn
WiFi sharing at home or in your office
Event tickets
Product packaging — link to instructions, warranty registration
Payment (very common in Asia, growing elsewhere)
Location sharing — encode a Google Maps link
Contact info on name badges at events

Frequently asked questions

What's the minimum size a QR code should be when printed? At least 2cm x 2cm (about 0.8 inches). For business cards, aim for 3cm x 3cm to ensure reliable scanning from a normal distance. Always test with a printed copy before bulk printing.

Is this completely free? Yes — no account, no payment, no watermark needed. You can use it as many times as you want.

Do my files get uploaded to a server? No. QR code generation runs entirely in your browser. No data is sent to any server.

QR Codes: How to Create and Scan for Free