HTML Validation Software

It sends the URL of your page or post to the Validator.nu API to verify that you have valid HTML code. The returned errors are stored in an easy to read report with links to full validation results.

Once the pro plugin is enabled you will find a “Content Filters” tab on the plugin settings page. Simply select the issues to be automatically corrected. As your website is rechecked you will find the issues in your error log disappearing, alternatively you can click the recheck link next to the error to verify that the problem has been resolved.

• Converts obsolete align attributes to CSS equivalent (i.e… align=”center” becomes style=”text-align:center;”)
• Converts heading tags inside table headers to span with style attribute
• Converts obsolete attributes on images to CSS equivalent (i.e… border, hspace, vspace)
• Converts obsolete attributes on tables and table cells to CSS equivalent (i.e… border, width, height)
• Converts obsolete attributes on horizontal rule (hr) elements to CSS equivalent (i.e… width, size, color, noshade)
• Removes content from between iframe tags, convert obsolete attributes on iframes to CSS equivalent (i.e… scrolling, frameborder) and replace incorrect values (i.e… width=”100%”)
• Converts big elements to to span with style attribute
• Converts center elements to span with style attribute
• Removes unnecessary type, charset and language attributes from script and style elements 
• Removes unnecessary role attributes such as 
• Converts named anchors to span with id tag
• Removes empty target attributes from anchor tags
• Removes empty id attributes from html elements
• Removes placeholder attributes from inappropriate html elements
  Moves incorrectly nested style elements to the head tag
• Corrects invalid attributes on embed tags and remove unnecessary end tags.
• Converts gallery shortcode tags to figure elements to resolve validation issues when caption is not included.
• Corrects incorrect content values on meta elements set to “X-UA-Compatible”
• Removes incorrect or obsolete attributes from the time element. (i.e… pubdate)
• Corrects or removes obsolete attributes on video elements (i.e… loop=”1″).
• Corrects or removes obsolete attributes on column elements (i.e… width=”153″).
• Adds name and action values to form elements when value is set to empty. 
• Remove the size attribute from form inputs of non supported types

• Linux/Unix, Apache webserver with MYSQL and PHP 5.6 or PHP 7 >
• To use content filtering features such as auto correction of issues, Multibyte String and Fileinfo Extensions must be enabled in PHP
• Tested on WordPress 5.3 >
• WordPress cron

Learn how to remove obsolete attributes in our Help Center.

Learn how to correct duplicate id attributes in our Help Center.