QR codes bridge physical and digital worlds with camera-scannable data.
Capabilities
- Store up to 4,296 alphanumeric characters.
- Error correction (7-30% data recovery).
- Fast scanning from any angle.
- Support URLs, text, contact cards, WiFi credentials.
Security risks
- QR phishing (quishing): Malicious codes lead to phishing sites.
- No preview: Can't see destination before scanning.
- Social engineering: Users trust QR codes too readily.
- Payment fraud: Modified codes redirect payments.
Safe practices
- Verify URL before visiting (most scanners show preview).
- Avoid scanning codes in public places (stickers over legitimate codes).
- Use scanner apps that preview URLs before opening.
- Don't scan codes for sensitive actions (payments, login).
Related Articles
View all articlesPhysical Security & CPTED: The Complete Guide to Protecting Facilities, Data Centers, and Critical Assets
A comprehensive guide to physical security covering CPTED principles, security zones, access control, fire suppression, and environmental controls for protecting facilities and data centers.
Read article →Lost Your Authenticator App? How to Recover Access and Prevent Future Lockouts
Lost your phone and can't access your accounts? Learn how to recover from authenticator app loss and set up cloud-synced backup strategies to prevent future lockouts.
Read article →Color Picker & Converter: HEX, RGB, HSL Tool
Pick colors and convert between HEX, RGB, HSL, and HSV formats with visual picker and accessibility checker. Perfect for designers and developers.
Read article →Email Security: A Complete Guide to Protecting Your Organization from Phishing, BEC, and Modern Threats
Learn how modern email attacks work, from phishing and business email compromise to credential harvesting. Understand SPF, DKIM, DMARC, secure email gateways, and the best practices organizations need to defend their inboxes.
Read article →Explore More Utilities
View all termsLorem Ipsum
Placeholder text used in design and publishing to demonstrate visual form without meaningful content.
Read more →Time Duration Calculation
The process of computing the elapsed time between two points in time, typically expressed in hours, minutes, days, or other units.
Read more →Timezone Conversion
The process of translating time from one geographic timezone to another, accounting for UTC offsets and daylight saving time.
Read more →