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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 17 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 7.01 released
Version 7.01 (released in October 2025) is the latest version of RGraph and now includes a new tree structure object. The accompanying Treemenu object can then turn the object into a fully dynamic tree menu. You can read the API documentation for the tree on the main API documentation page and see an example of the Treemenu feature by following this link...

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New 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 7.01, 8th October 2025) 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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HOWTO: Get rounded corners on a Bar chart


[No canvas support]

This page previously detailed how to get rounded corners on your Bar chart. This involved a lot of code and necessitated you to redefine the canvas rect api function.

Now, however, there's a corners option for the Bar chart which does everything for you. Animations are no problem either.

Here's the source code for the chart shown here which demonstrates the corners option. There's also a cornersRoundRadius option as well which allows you to control the extent of the rounding effect. 

<script>
    new RGraph.Bar({
        id: 'cvs',
        data: [12,13,16,15,16,19,19],
        options: {
            marginTop: 35,
            marginLeft: 55,
            title: 'Percentage of goods sold',
            titleSize: 16,
            titleBold: true,
            xaxisLabels: '%{property:_days_short[%{index}]}',
            _days_short: ['Mon','Tue','Wed','Thur','Fri','Sat','Sun'],
            _days: ['Mon','Tuesday','Wednesday','Thursday','Friday','Saturday','Sunday'],
            tooltips: '%{property:_days[%{dataset}]}: %{value}%',
            tooltipsCss: {
                fontSize: '20pt'
            },
            backgroundGridVlines: false,
            backgroundGridBorder: false,
            xaxis: false,
            yaxis: false,
            yaxisScaleUnitsPost: '%',
            colors: ['Gradient(#c33:red:red:red)'],
            textSize: 16,
            
            corners: 'round',
            cornersRoundRadius: 50
        }
    }).wave();
</script>