Free QR Code APIs: Generate and Read QR Codes via REST

QR codes bridge physical and digital experiences. Whether you're building a ticketing system, payment flow, or marketing campaign, these free APIs make QR code generation and reading trivial.

QRCode Gen - Custom QR Code Generation

Create QR codes with custom colors, logos, and error correction levels. Supports PNG, SVG, and PDF output formats. 5,000 free QR codes per month.

curl -X POST https://freeapitools.dev/api/v1/qr/generate \
  -d '{
    "data": "https://example.com/ticket/12345",
    "size": 500,
    "format": "png",
    "foreground": "#000000",
    "background": "#FFFFFF"
  }'

# Response:
# {
#   "url": "https://cdn.freeapitools.dev/qr/abc123.png",
#   "size": 500,
#   "format": "png"
# }

View QRCode Gen docs →

BarcodeReader - Scan QR Codes and Barcodes

Detect and decode QR codes, EAN, UPC, and Code128 barcodes from images. Supports batch processing. 1,000 free scans per month.

View BarcodeReader docs →

Use Cases

• Event ticketing: Generate unique QR codes for each ticket
• Product authentication: Add QR codes to verify genuine products
• Contact sharing: Generate vCard QR codes for business cards
• Wi-Fi access: Create QR codes that connect to Wi-Fi networks
• Payment flows: Generate dynamic payment QR codes

Error Correction Levels

QR codes support four error correction levels:

• L (Low): 7% correction - use for clean environments
• M (Medium): 15% correction - default, good balance
• Q (Quartile): 25% correction - use if adding logos
• H (High): 30% correction - maximum durability

Adding Logos to QR Codes

curl -X POST https://freeapitools.dev/api/v1/qr/generate \
  -d '{
    "data": "https://example.com",
    "size": 600,
    "logo_url": "https://example.com/logo.png",
    "error_correction": "H"
  }'

Use error correction level H when adding logos to ensure scannability.

Get Started

Get your free API key →