QRCodeAPI is a simple, open-source QR Code Generator API built from scratch. It supports generating QR codes in PNG, SVG, ASCII, and JSON formats. Hosted on Vercel and open to anyone.
- Generate QR codes via a REST API
- Output formats: PNG, SVG, ASCII (terminal), JSON (matrix)
- Rate limiting for public safety
- Easy to deploy on Vercel
POST /api/generate
Send a JSON object with at least a text field:
{
"text": "Hello World",
"type": "png" // or "svg", "ascii", "json"
}color: Foreground color (default:#000)bgColor: Background color (default:#fff)width,height: Output size (PNG only)
Invoke-RestMethod -Uri "https://<your-app-ip>/api/generate" -Method POST -ContentType "application/json" -Body '{"text":"Hello World","type":"svg"}'
curl -X POST https://<your-app-ip>/api/generate \ -H "Content-Type: application/json" \ -d '{"text":"Hello World","type":"png"}' --output qrcode.png
Invoke-RestMethod -Uri "https://<your-app-ip>/api/generate" -Method POST -ContentType "application/json" -Body '{"text":"https://example.com","type":"png"}' --OutFile "example_com.png"
To encode WiFi credentials, use the following format for the text field:
WIFI:T:WPA;S:MyNetwork;P:MyPassword;;
Example (PowerShell):
Invoke-RestMethod -Uri "https://<your-app-ip>/api/generate" -Method POST -ContentType "application/json" -Body '{"text":"WIFI:T:WPA;S:MyNetwork;P:MyPassword;;","type":"svg"}' > wifi_qr.svg
Example (curl):
curl -X POST https://<your-app-ip>/api/generate \ -H "Content-Type: application/json" \ -d '{"text":"WIFI:T:WPA;S:MyNetwork;P:MyPassword;;","type":"png"}' --output wifi_qr.png
- Clone the repo:
git clone https://github.com/raigon-pawa/QRCodeAPI.git - Install dependencies:
npm install - Deploy to Vercel:
- Import the repo in Vercel
- Vercel will auto-detect the
/api/generateendpoint
Run locally with Express:
npm start
The API will be available at http://localhost:3000/api/generate
MIT