Open-source • No SDK • REST

Generate QR codes with a single API call

PNG, SVG, ASCII, or JSON. Free, simple, and deployable to Vercel in minutes.

Formats PNG • SVG • ASCII • JSON

Endpoint POST /api/generate

Hosted Vercel-ready

Overview

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.

Generate QR codes via a REST API
Output formats: PNG, SVG, ASCII (terminal), JSON (matrix)
Public rate limiting
Easy to deploy on Vercel

Note: PNG width/height are supported; colors apply to PNG and SVG.

Quickstart

bash

curl -X POST https://<your-app-url>/api/generate \
  -H "Content-Type: application/json" \
  -d '{"text":"Hello World","type":"png"}' --output qrcode.png

powershell

Invoke-RestMethod -Uri "https://<your-app-url>/api/generate" -Method POST -ContentType "application/json" -Body '{"text":"Hello World","type":"svg"}' > qrcode.svg

API

Method	Endpoint	Description
`POST`	`/api/generate`	Create a QR code

Request Body

JSON

{
  "text": "Hello World",
  "type": "png" // "svg" | "ascii" | "json"
}

Optional (PNG/SVG):

color Foreground (default #000)
bgColor Background (default #fff)
width, height (PNG only)

Examples

bash

curl -X POST https://<api-url>/api/generate \
  -H "Content-Type: application/json" \
  -d '{"text":"Hello","type":"png"}' \
  --output qrcode.png

powershell

Invoke-RestMethod `
  -Uri "https://<api-url>/api/generate" `
  -Method POST `
  -ContentType "application/json" `
  -Body '{"text":"Hello","type":"svg"}'

If calling from the browser on a different origin, ensure CORS is enabled on your deployment.

Example QR Codes

1) Website URL

Encodes https://example.com

powershell

Invoke-RestMethod `
  -Uri "https://<api-url>/api/generate" `
  -Method POST `
  -ContentType "application/json" `
  -Body '{"text":"https://example.com","type":"png"}' `
  -OutFile "example_com.png"

bash

curl -X POST https://<api-url>/api/generate \
  -H "Content-Type: application/json" \
  -d '{"text":"https://example.com","type":"png"}' \
  --output example_com.png

2) WiFi QR Code

Format your text as: WIFI:T:WPA;S:MyNetwork;P:MyPassword;;

powershell

Invoke-RestMethod `
  -Uri "https://<api-url>/api/generate" `
  -Method POST `
  -ContentType "application/json" `
  -Body '{"text":"WIFI:T:WPA;S:MyNet;P:MyPass;;","type":"svg"}' `
  > wifi_qr.svg

bash

curl -X POST https://<api-url>/api/generate \
  -H "Content-Type: application/json" \
  -d '{"text":"WIFI:T:WPA;S:MyNet;P:MyPass;;","type":"png"}' \
  --output wifi_qr.png

Playground

Test the API directly from your browser.

Result

Fill the form and hit Generate.

Equivalent request

bash

curl -X POST <base-url>/api/generate \
  -H "Content-Type: application/json" \
  -d '{"text":"Hello World","type":"png"}' \
  --output qrcode.png

powershell

Invoke-RestMethod `
  -Uri "<base-url>/api/generate" `
  -Method POST `
  -ContentType "application/json" `
  -Body '{"text":"Hello World","type":"png"}' `
  -OutFile "qrcode.png"

Rate limiting may apply on public deployments.

Deployment

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/generate endpoint

Local dev: npm start then call http://localhost:3000/api/generate

License

MIT — Use it freely in commercial or personal projects. Attribution appreciated.

Star on GitHub ⭐