PhantomJS - Scriptable Headless Browser

http://phantomjs.org/

PhantomJS is an optimal solution for:

Page automation

Access webpages and extract information using the standard DOM API, or with usual libraries like jQuery.

Screen capture

Programmatically capture web contents, including SVG and Canvas. Create web site screenshots with thumbnail preview.

Headless website testing

Run functional tests with frameworks such as Jasmine, QUnit, Mocha, WebDriver, etc.

Network monitoring

Monitor page loading and export as standard HAR files. Automate performance analysis using YSlow and Jenkins.