M
API Matrix

Image-Charts API

⭐ Beginner's Pick Development / No Auth Required Beginner HTTPS CORS
Free to Use Varies (check documentation)
92 Score
Grade A+
Visit Official Site Compare Alternatives

Overview

Image-Charts generates chart images and QR codes on-the-fly via a simple GET request URL, with chart parameters encoded directly into the query string. It supports bar, line, pie, radar, and other chart types and returns a PNG image you can embed directly in emails, PDFs, or web pages without any client-side JavaScript. No authentication is required for basic usage.

💡

Beginner Tip

The entire API is a single URL — encode all your chart options as query parameters and the response is the image itself. Try it directly in a browser: paste the URL and you see your chart immediately. This makes it perfect for generating charts inside emails or server-side documents where JavaScript cannot run.

Available Data

randomly generated data
customizable output format
generated QR code image
encoded data string

Example Response

JSON Response 
{
  "image_url": "https://api.example.com/qr/abc123.png",
  "data": "https://example.com",
  "format": "png",
  "size": "300x300"
}

Field Reference

(binary PNG body) The chart or QR code rendered as a PNG image returned directly in the response body.
Content-Type (response header) Always image/png for successful chart requests.
X-Image-Charts-Info (response header) Informational header present on some responses indicating rendering metadata or warnings.

Implementation Example 

const url = "https://documentation.image-charts.com/";
const response = await fetch(url);
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data);

What Can You Build?

Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.

Common Errors & Troubleshooting

Distorted or cut-off chart Chart dimensions (chs parameter) are too small for the data
✓ Increase width and height, e.g. chs=700x400, and reduce the number of data points or labels.
Invalid chart type error Unsupported cht value
✓ Refer to the documentation for valid chart types; common ones are bvg (vertical bar), lc (line), p (pie).
QR code not scanning Data string is too long for the selected QR size
✓ Increase chs dimensions or shorten the encoded data; large URLs may need at least 500x500px.

Matrix Score Breakdown

🌐 Reachability 30/30
⚡ Speed 20/20
🔒 Security 15/15
🛠 Developer XP 20/20
✓ Reliability 7/15
Response Time 123ms

Fully tested on Apr 5, 2026

Technical Specifications

Auth No Auth
HTTPS REQUIRED
CORS YES
Category Development
Difficulty Beginner
Verified: 2026-04-04

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