QR Code Generator

Generate QR codes from text, URLs, email addresses, WiFi credentials, and more.

Workflow Input
Clear
Scan-ready summary
QR code will appear here
https://comutil.com
Scan-Ready Presets
Website link
Active
Share a docs page, product launch, or event page that someone should open in a browser.
Guest WiFi
Preset
Show how a scan-first WiFi handoff works without putting a private password into the share flow.
Email helpdesk
Preset
Prepare a scan that opens a draft email to support or onboarding contacts.
Phone support
Preset
Hand off a callback or hotline number that should open directly in the dialer.
Text note
Preset
Encode a short instruction, venue note, or handoff message when no other payload type fits.
Contact card
Preset
Hand over a name, company, phone, email, and site that the scanner saves as a contact.
SMS reply
Preset
Open a text message to one number with the first line already written.
Venue location
Preset
Drop a map pin so a scan opens the coordinates in a maps app.
What is a QR Code?

QR (Quick Response) codes are two-dimensional barcodes that store data in a matrix of black and white squares. A single code holds up to 4,296 alphanumeric characters, enough for URLs, contact cards, and Wi-Fi credentials.

How QR Codes Work

QR codes encode data in patterns of modules (black/white squares). They include error correction using Reed-Solomon codes, allowing partial recovery if damaged. The three large squares in corners help scanners detect orientation. Different versions (1-40) offer varying capacities.

Common Use Cases
  • Sharing website URLs
  • WiFi network credentials
  • Contact information (vCard)
  • Payment links and invoices
  • Event tickets and boarding passes
Data Types
URL Web addresses that open in browser
Text Plain text messages
WiFi Auto-connect to WiFi networks
vCard Contact information for address books
Frequently Asked Questions

How much data can a QR code store?

Maximum capacity is 4,296 alphanumeric characters or 7,089 numeric digits. However, more data means more modules and harder scanning. Keep content short for best reliability.

Why do QR codes have error correction?

Error correction allows QR codes to remain readable even when partially obscured or damaged. Levels range from L, which recovers 7 percent, to H, which recovers 30 percent. Higher correction means larger codes.