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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 7.10 released
Version 7.10 (released in January 2026) is the latest version of RGraph and contains various updates to the code which you can see on the changelog page. There's also a big tidy up in terms of comments and a significant change to the way that the internal code is referenced which should lead to a performance improvement in effects and animations.

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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 7.10, 18th January 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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HOWTO: Use CSS3 transitions

By using CSS transitions you can make smooth CSS animations and effects for your canvas tag. The effect shown below switches between two charts using a CSS transition and also changing the CSS width and height (the HTML width and height attributes which set the width and height of the canvas remain unchanged). The code changes the CSS width and height settings at the correct times and the CSS transition does the rest. The CSS transition is defined on the canvas tag (in CSS like this: 

<style>
    canvas {
        transition: width .5s, height .5s, top .5s, left .5s;
    }
</style>

<script>
    window.onload = (function ()
    {
        //
        // Used to track which chart is currently being displayed
        //
        var type = true;

        //
        // This function is called to draw the bar chart
        //
        function drawBar ()
        {
            var bar = new RGraph.Bar({
                id: 'cvs',
                data: [5,8,16,5,8,9,4,3,2,4,3,2],
                options: {
                    xaxisLabels: ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'],
                    textSize: 14
                }
            }).draw();
        
            type = false;
        }




        //
        // This function is called to draw the line chart
        //
        function drawLine ()
        {
            var line = new RGraph.Line({
                id: 'cvs',
                data: [5,8,16,5,8,9,4,3,2,4,3,2],
                options: {
                    xaxisLabels: ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'],
                    textSize: 14
                }
            }).draw();
                
            type = true;
        }



        //
        // This is the onclick event for the button
        //
        document.getElementById('myButton').onclick = function (e)
        {
            var canvas   = document.getElementById('cvs');

            //
            // This CSS change results in the <canvas> shrinking (due to the CSS transition)
            //
            canvas.style.width  = 0;
            canvas.style.height = 0;
            canvas.style.top    = '100px'
            canvas.style.left   = '300px';
            
            //
            // Now that the <canvas> has been shrunk - wait 0.75 seconds, draw the alternate
            // chart and unshrink it.
            //
            setTimeout(function ()
            {
                RGraph.reset(canvas);
                canvas.__rgraph_aa_translated__ = false;
                
                if (!type) {
                    drawBar();
                } else {
                    drawLine();
                }


                //
                // This CSS change results in the canvas expanding (due to the CSS transition)
                //
                canvas.style.width    = '600px';
                canvas.style.height   = '250px';
                canvas.style.position = 'relative';
                canvas.style.left     = 0;
                canvas.style.top      = 0;
                
            }, 750)
            
        }
        
        drawBar();
    });
</script>