RGraph is a JavaScript charts library based on HTML5 SVG and canvas. RGraph is mature (over 15 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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Get the latest version of RGraph (version 6.18, 1st June 2024) 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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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: Using the global configuration values

Global configuration values are an easy way to reduce the amount of code on your pages if you're showing multiple charts that you want to all look the same - or at least share some configuration values.

You can set all or just a few values on the global object and all subsequently created chart objects will pick up those values. Here's an example:

    RGraph.SVG.GLOBALS.backgroundGridVlines = false;
    RGraph.SVG.GLOBALS.backgroundGridBorder = false;
    RGraph.SVG.GLOBALS.xaxisLabels          = ['Mon', 'Tue','Wed','Thu','Fri','Sat','Sun'];
    RGraph.SVG.GLOBALS.colors               = ['blue', 'red','pink','green'];
    RGraph.SVG.GLOBALS.marginInner          = 15;
    RGraph.SVG.GLOBALS.xaxis                = false;
    RGraph.SVG.GLOBALS.yaxis                = false;
    new RGraph.SVG.Bar({
        id: 'cc',
        data: [
            [8,8,8,4],[4,1,4,9], [6,3,6,3], [2,8,5,5],
            [4,6,1,2], [6,3,8,6], [4,8,4,8]
        options: {
            marginInnerGrouped: 2

    new RGraph.SVG.Bar({
        id: 'cc2',
        data: [5,8,7,6,4,3,5],
        options: {

The global properties are read and set first - so any further configuration that you then set on the individual object will override the global value.