QuickChart: Open-Source Chart Generation API

QuickChart is a powerful, open-source chart image generation API that has served over 4 billion charts worldwide. Built on Chart.js, the most popular open-source charting library, QuickChart enables developers to generate customizable charts through simple URL parameters or client libraries.

Key Features

• RESTful API for generating chart images via URL parameters
• Support for multiple chart types: bar, line, pie, radar, and more
• Official client libraries for Python, JavaScript, Java, C#, Ruby, PHP, and Go
• Customizable styling, colors, gradients, and animations
• Built-in support for responsive designs and retina displays
• Compatible with email clients, markdown documents, and any platform that displays images
• Easy integration with no-code tools like Zapier, Make, Airtable, and Google Sheets

Technical Specifications

Core Technology

• Built on Node.js and Chart.js
• Supports Chart.js 2.9.4 configurations
• Outputs PNG images by default

Deployment

• Docker-ready for easy deployment
• Memory-efficient image rendering
• Horizontally scalable architecture
• AGPLv3 licensed with commercial license option

Why Self-Host QuickChart?

Self-hosting QuickChart gives you complete control over your chart generation infrastructure, ensuring:

• Data privacy and security
• Customization flexibility
• On-premise deployment options
• Scalable chart generation

Get started with one-click deployment on Railway and join thousands of developers and businesses already using QuickChart for their data visualization needs.

Quick Start

// Example usage
const chartUrl = 'https://quickchart.io/chart?c={type:"bar",data:{labels:["Q1","Q2","Q3","Q4"], datasets:[{label:"Users",data:[50,60,70,180]}]}}';
Integration Examples
pythonCopyfrom quickchart import QuickChart

qc = QuickChart()
qc.width = 500
qc.height = 300
qc.config = {
    'type': 'bar',
    'data': {
        'labels': ['Q1', 'Q2', 'Q3', 'Q4'],
        'datasets': [{
            'label': 'Users',
            'data': [50, 60, 70, 180]
        }]
    }
}

# Get chart URL or save as image
print(qc.get_url())
qc.to_file('chart.png')