Insert Html Snippet is a free wordpress plugin to add HTML, CSS and javascript code to your pages and posts using shortcodes.
Main features:
Convert HTML snippets to shortcodes
Convert Javascript codes to shortcodes
Convert CSS codes to shortcodes
Support for snippet shortcodes in widgets
Dropdown menu in TinyMCE editor to pick snippet shortcodes easily
To install Insert Html Snippet
Login to wordpress (wp-admin).
In your admin dashboard click plugins and select Add New.
Type Insert Html Snippet in the search field and click Search Plugins button.
Install Insert Html Snippet.
After the successfully Installation click the activate Plugin link to activate the plugin.
[OR]
Download Insert Html Snippet wordpress plugin. Download link
Unzip and upload it to your WordPress wp-content/plugins directory.
Login to wp-admin. In your admin dashboard click plugins and activate the Insert Html Snippet wordpress plugin.