by Torstein Hønsi
It works in all modern mobile and desktop browsers including the iPhone/iPad and Internet Explorer from version 6. On iOS and Android, multitouch support provides a seamless user experience. Standard browsers use SVG for the graphics rendering. In legacy Internet Explorer graphics are drawn using VML.
Do you want to use Highcharts for a personal website, a school site or a non-profit organisation? Then you don't need the author's permission, just go on and use Highcharts. For commercial websites and projects, see License and Pricing.
One of the key features of Highcharts is that under any of the licenses, free or not, you are allowed to download the source code and make your own edits. This allows for personal modifications and a great flexibility.
Highcharts is solely based on native browser technologies and doesn't require client side plugins like Flash or Java. Furthermore you don't need to install anything on your server. No PHP or ASP.NET. Highcharts needs only two JS files to run: The highcharts.js core and either the jQuery, MooTools or Prototype framework. One of these frameworks is most likely already in use in your web page.
Highcharts supports line, spline, area, areaspline, column, bar, pie, scatter, angular gauges, arearange, areasplinerange, columnrange and polar chart types. Many of these can be combined in one chart.
Through a full API you can add, remove and modify series and points or modify axes at any time after chart creation. Numerous events supply hooks for programming against the chart. In combination with jQuery, MooTools or Prototype's Ajax API, this opens for solutions like live charts constantly updating with values from the server, user supplied data and more.
Sometimes you want to compare variables that are not the same scale - for example temperature versus rainfall and air pressure. Highcharts lets you assign an y axis for each series - or an x axis if you want to compare data sets of different categories. Each axis can be placed to the right or left, top or bottom of the chart. All options can be set individually, including reversing, styling and position.
On hovering the chart Highcharts can display a tooltip text with information on each point and series. The tooltip follows as the user moves the mouse over the graph, and great efforts have been taken to make it stick to the nearest point as well as making it easy to read a point that is below another point.
75% of all charts with an X and Y axis have a date-time X axis. Therefore Highchart is very intelligent about time values. With milliseconds axis units, Highcharts determines where to place the ticks so that they always mark the start of the month or the week, midnight and midday, the full hour etc.
With the exporting module enabled, your users can export the chart to PNG, JPG, PDF or SVG format at the click of a button, or print the chart directly from the web page.
By zooming in on a chart you can examine an especially interesting part of the data more closely. Zooming can be in the X or Y dimension, or both.
Ideal for dashboards, angular gauges provides speedometer-like charts, easy to read at a quick glance.
Cartesian chart types like line, area, spline or areaspline can be converted to polar or radial chart by one simple option.
Sometimes you need to flip over your chart and make the X axis appear vertical, like for example in a bar chart. Reversing the axis, with the highest values appearing closest to origo, is also supported.
All text labels, including axis labels, data labels for the point and axis titles, can be rotated in any angle.