GoldSmith Forms English Only Filter

Ideal Postcodes UK address search and validation extension for WooCommerce

Prevent URLS & Emails in gravity forms textarea fields.

This plugin will allow you to check your pages/posts HTML against the W3C Validator.

This plugin adds an awesome feature that provides instant feedback and guidance in each field, helps prevent errors.

Added mail validation function to Contact Form 7. Protected by rejection filter, RFC filter, and DNS filter.

The Validated Field add-on for Advanced Custom Fields provides input masking and server-side validation of other field types.