About
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 show charts on your website.

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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 (£99) commercial license available.

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Download
Get the latest version of RGraph (version 6.17) from the download page. There's also older versions available, minified files and links to cdnjs.com hosted libraries.

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Margin-sizing tool

This tool can help you with the size of your margins on your canvas (or svg) tag. Simply drag the gray area (this represents the area that the chart is drawn in) around and resize it using the small black square in the bottom right corner. The margin sizes are shown in the text boxes below.

Margin top:
Margin left:
Margin bottom:
Margin right: