.net Powerful JavaScript charts
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.

More »


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 hosted libraries.

More »


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.

More »

The font property

The font property sets how any text that you draw on the canvas appears. It's read like css font declarations are and you can have bold, italic or bold and italic text if you wish.

Rotating text

Whilst there is no option to rotate text it can be achieved by rotating the canvas first, draw the text (which appears as it would - horizontally) and then rotate the canvas back. Lots of the text functionality can be wrapped up in a custom function (that you can write) to save repeating code. There's one such function linked at the bottom. This function encapsulates options for bolding, italics, multiple line text etc.

Examples of setting the font property

You can use css style font declarations like this:

    window.onload = function ()
        var canvas  = document.getElementById("cvs");
        var context = canvas.getContext('2d');

        // Different font settings
        context.font = 'Bold 19pt Arial';
        context.font = 'Italic 19px Arial';
        context.font = 'bold italic  19px Arial';
        context.font = '250% Monospace';