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.net Powerful JavaScript charts
About
RGraph is a JavaScript charts library based on HTML5 SVG and canvas. RGraph is mature (over 18 years old) and has a wealth of features making it an ideal choice to use for showing charts on your website.

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Version 7.11
Version 7.11 (released in March 2026) is the latest version of RGraph and contains just a few updates to the code which you can see on the changelog page. There's a new dumbbell variation for the Bar and Horizontal bar charts (both SVG and canvas) and the front page layout of the website has been tweaked.

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HTML datagrid
In the April 2025 (v6.21) release a new datagrid object was added. This makes it easy to add static or dynamic data tables to your pages. It can be used whether you use the canvas or SVG libraries or entirely standalone.

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Download
Get the latest version of RGraph (version 7.11, 21st March 2026) from the download page. You can read the changelog here. There's also older versions available, minified files and links to cdnjs.com hosted libraries.

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License
RGraph can be used for free under the GPL or if that doesn't suit your situation there's an inexpensive (£129) commercial license available.

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A nested Donut chart

[No canvas support]

This is an example of the new (in version 5.28) RGraph.Activity class. (You can read the documentation page for the Activity meter here. Previously to get this sort of chart a large amount of custom code was necessary but now the chart has been given its own class - which is in the RGraph.activity.js file.

The colors and quantity of the rings are specified by you and the icons are configurable (or can be replaced with text if you prefer. The chart can be animated using the grow effect, adjusted and can now also have tooltips.

This goes in the documents header: 
<script src="RGraph.common.core.js"></script>
<script src="RGraph.activity.js"></script>
Put this where you want the chart to show up: 
<div style="float: right; display: inline-block">
    <canvas id="cvs" width="450" height="450" style="background-color: black;">[No canvas support]</canvas>
</div>
This is the code that generates the chart - it should be placed AFTER the canvas tag(s): 
<script>
    activity = new RGraph.Activity({
        id: 'cvs',
        min: 0,
        max: 100,
        value: [67,57,46],
        options: {
            icons: [
                '../images/activityMeter-arrowright.png',
                '../images/activityMeter-arrowup.png',
                '../images/activityMeter-arrowdown.png'
            ],
            width: 50,
            marginTop: 5,
            marginBottom: 5,
            marginLeft: 5,
            marginRight: 5,
            responsive: [
                {maxWidth: null, width: 350, height: 350, options: {width: null}, parentCss: {'float':'right', textAlign:'none',width:''}},
                {maxWidth: 750,  width: 250, height: 250, options: {width: 25}, parentCss: {'float':'none', textAlign:'center',width:'100%'}}
            ]
        }
    }).grow();
</script>