WordPress validate plugins

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

A WordPress plugin to verify certificates with unique IDs and codes through custom URLs and shortcodes.

Generic form processor allowing forms to be painlessly processed and aggregated, with numerous options to validate data and perform custom commands

Validate all post with WCAG standard

Check if the Email's Gravatar is exist. 檢測指定郵箱的Gravatar是否存在

Validate a website to ensure it follows best practices for security, performance and effectiveness.

Empty posts/pages still get wrapped in tags, which makes them invalid. This plugin fixes that. PHP5 Required.

Automatic quality-assurance checks, ensuring your articles meet editorial guidelines.

Make native WordPress comments better by using modern standards

Stop Spam User Registrations by Adding StopForumSpam.com, Emailable.com, and Email Domain Extension Filters.

A simple tool to format and validate JSON online within your WordPress admin.