Free Public API

Free API Documentation

Generate QR codes and barcodes instantly via a simple GET request. No API key. No sign-up.

No API key required No sign-up Returns image directly PNG · SVG · JPG

Introduction

100% Free — No API key needed. Just make a GET request with your data and get an image back. Works in any browser, <img> tag, cURL, JavaScript, Python, or any HTTP client.

The Free API provides two endpoints: QR code generation and barcode generation. Both return the image directly as binary — not wrapped in JSON — so you can use the URL anywhere an image source is accepted.

Base URL

https://www.codeprints.site/api/v1

Rate Limits

Endpoint	Limit	Window
`/api/v1/get_qr`	120 requests	per minute, per IP
`/api/v1/get_barcode`	120 requests	per minute, per IP

Exceeding the limit returns HTTP 429 Too Many Requests. Wait 60 seconds before retrying. Need higher limits? Register for an API key (60 req/min authenticated).

Response Format

On success the API returns the raw image bytes with the appropriate Content-Type header. On error it returns JSON with an error key.

Success (200)

                            Content-Type: image/png

                            Content-Type: image/svg+xml

                            Content-Type: image/jpeg

Body = raw image bytes

Error (4xx)

{
  "error": "Missing required parameter: data"
}

QR Code API

GET https://www.codeprints.site/api/v1/get_qr

Returns a QR code image directly. Supports PNG and SVG output with full color customization.

Parameters

Parameter	Type	Default	Description
`data` required	string	—	The text or URL to encode in the QR code. Max 2048 chars.
`size` optional	integer	`300`	Output size in pixels. Range: 100–1000.
`format` optional	string	`png`	`png` or `svg`. SVG is vector and infinitely scalable.
`margin` optional	integer	`1`	Quiet zone (white border) around QR. Range: 0–10.
`fg` optional	string	`000000`	Foreground (module) color as 6-digit hex. With or without `#`.
`bg` optional	string	`ffffff`	Background color as 6-digit hex. With or without `#`.

Examples

Minimal — just encode some data:

https://www.codeprints.site/api/v1/get_qr?data=Hello+World

URL QR code, large, SVG:

https://www.codeprints.site/api/v1/get_qr?data=https://example.com&size=500&format=svg

Custom indigo color, 400px:

https://www.codeprints.site/api/v1/get_qr?data=12345&fg=6366f1&bg=eef2ff&size=400

WhatsApp deep-link:

https://www.codeprints.site/api/v1/get_qr?data=https://wa.me/447911123456&size=300

Try It — QR Code

data required

size

format

margin

fg (hex)

bg (hex)

Download

Generated URL:

Use this URL directly in an <img src="..."> tag.

Barcode API

GET https://www.codeprints.site/api/v1/get_barcode

Returns a barcode image directly. Supports PNG, SVG, and JPG output across 14 standard barcode formats.

Parameters

Parameter	Type	Default	Description
`data` required	string	—	The value to encode. Max 255 chars. Must be valid for the chosen barcode type.
`type` optional	string	`C128`	Barcode format. See the Barcode Types table. Default is Code 128 which accepts any alphanumeric input.
`format` optional	string	`png`	`png`, `svg`, or `jpg`.
`width` optional	integer	`2`	Bar width multiplier. Range: 1–5. Higher = wider bars.
`height` optional	integer	`80`	Bar height in pixels. Range: 30–300.
`fg` optional	string	`000000`	Bar color as 6-digit hex. With or without `#`.

Supported Barcode Types

C128

Code 128

Any alphanumeric — best default

C128A

Code 128 A

Uppercase + control chars

C128B

Code 128 B

Full ASCII

C128C

Code 128 C

Even-length digits only

C39

Code 39

Uppercase + digits + symbols

C39+

Code 39 Ext.

Full ASCII via Code 39

EAN13

EAN-13

Exactly 12 digits

EAN8

EAN-8

Exactly 7 digits

UPCA

UPC-A

Exactly 11 digits

UPCE

UPC-E

6-digit compact UPC

I25

ITF-25

Even-length digits

MSI

MSI/Plessey

Digits only

CODABAR

Codabar

Digits + - $ : / . +

PDF417

PDF 417

High-density 2D

When in doubt use type=C128 — it encodes any text or number and is the most widely scanned format.

Examples

Basic Code 128 barcode:

https://www.codeprints.site/api/v1/get_barcode?data=12345

EAN-13 product barcode, tall, SVG:

https://www.codeprints.site/api/v1/get_barcode?data=590123412345&type=EAN13&height=120&format=svg

Wide Code 39, custom color:

https://www.codeprints.site/api/v1/get_barcode?data=HELLO&type=C39&width=3&height=100&fg=6366f1

Large JPG for print:

https://www.codeprints.site/api/v1/get_barcode?data=987654321&format=jpg&width=4&height=200

Try It — Barcode

data required

type

format

width

height

fg (hex)

Download

Generated URL:

Use this URL directly in an <img src="..."> tag.

Integration Guides

HTML <img> tag

<!-- QR code -->
<img src="https://www.codeprints.site/api/v1/get_qr?data=Hello+World&size=300"
     alt="QR Code" width="300" height="300">

<!-- Barcode -->
<img src="https://www.codeprints.site/api/v1/get_barcode?data=12345&height=80"
     alt="Barcode">

cURL

# Download QR code as PNG
curl -o qr.png "https://www.codeprints.site/api/v1/get_qr?data=Hello+World&size=300"

# Download barcode as SVG
curl -o barcode.svg "https://www.codeprints.site/api/v1/get_barcode?data=12345&type=C128&format=svg&height=100"

# View in browser (pipe to open)
curl -s "https://www.codeprints.site/api/v1/get_qr?data=https://example.com" | open -f -a Preview

JavaScript (fetch)

// ── QR Code ──────────────────────────────
const qrUrl = `https://www.codeprints.site/api/v1/get_qr?data=${encodeURIComponent('Hello World')}&size=300`;
document.getElementById('myImg').src = qrUrl;

// ── Barcode (blob → object URL) ───────────
async function loadBarcode(data) {
  const url  = `https://www.codeprints.site/api/v1/get_barcode?data=${encodeURIComponent(data)}&type=C128&height=80`;
  const res  = await fetch(url);
  const blob = await res.blob();
  const img  = document.getElementById('bcImg');
  img.src = URL.createObjectURL(blob);
}
loadBarcode('12345');

PHP

// ── Save QR code to file ──────────────────
$data  = urlencode('Hello World');
$url   = "https://www.codeprints.site/api/v1/get_qr?data={$data}&size=300";
$image = file_get_contents($url);
file_put_contents('qr.png', $image);

// ── Serve inline to browser ───────────────
header('Content-Type: image/png');
$bc = urlencode('12345');
echo file_get_contents("https://www.codeprints.site/api/v1/get_barcode?data={$bc}&type=EAN13&height=100");

Python (requests)

import requests

# ── Download QR code ──────────────────────
params = {'data': 'Hello World', 'size': 300, 'format': 'png'}
r = requests.get('https://www.codeprints.site/api/v1/get_qr', params=params)
with open('qr.png', 'wb') as f:
    f.write(r.content)

# ── Download barcode ──────────────────────
params = {'data': '12345', 'type': 'C128', 'height': 80}
r = requests.get('https://www.codeprints.site/api/v1/get_barcode', params=params)
with open('barcode.png', 'wb') as f:
    f.write(r.content)

Error Reference

HTTP Code	Meaning	Common Cause
`200 OK`	Success	Image returned directly.
`400 Bad Request`	Missing parameter	`data` parameter was not provided.
`422 Unprocessable`	Validation error	Data too long, invalid format, or incompatible barcode type (e.g. letters in EAN-13).
`429 Too Many Requests`	Rate limited	Exceeded 120 req/min. Wait 60 s.
`500 Server Error`	Generation failed	Rare — report to support.

// Error response body (JSON)
{
  "error": "Cannot encode this data with the selected barcode type: ..."
}

Need higher limits?

Register for a free account to get an API key with the full authenticated API — detailed JSON responses, error correction control, and more.

Get API Key Free Full API Docs