WordPress Security Checker

Reference → Best Practices

Comprehensive WordPress security checklist with code examples. Learn best practices for securing plugins and themes with nonces, sanitization, capability checks, and more.

About WordPress Security Checker

WordPress Security Checker is a free, browser-based tool that lets you comprehensive WordPress security checklist with code examples. Learn best practices for securing plugins and themes with nonces, sanitization, capability checks, and more. It supports Reference → Best Practices. Everything runs locally on your device, so your files are never uploaded to a server. There's no sign-up, no watermark, and no limit — just open WordPress Security Checker, add your input, and get results instantly.

How to use WordPress Security Checker

Browse Security Issues

View all security checks organized by severity level.

Review Details

Click each issue to see explanation and code examples.

Copy Code

Use the copy button to get ready-to-use security code.

Implement

Add security patterns to your plugins and themes for protection.

Key features

Learn Security Basics

Understand WordPress security fundamentals from an expert-curated checklist.

Code Examples

Copy-paste ready code examples for every security best practice.

Prevent Common Attacks

Protect your code against XSS, CSRF, SQL injection, and other vulnerabilities.

Improve Code Quality

Follow WordPress security standards that make your code professional and maintainable.

Build User Trust

Secure code protects user data and builds confidence in your WordPress solutions.

Plugin Directory Ready

Meet WordPress plugin directory security requirements with this comprehensive guide.

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Frequently Asked Questions

What is a nonce in WordPress?

A nonce (number used once) is a security token that verifies form submissions came from your site and prevents CSRF attacks. Always verify nonces before processing data.

What's the difference between sanitization and escaping?

Sanitization cleans user input (input data), while escaping cleans output data before displaying it. Both are essential for security.

How do I check user permissions?

Use current_user_can() to check capabilities. Examples: 'manage_options' for admins, 'edit_posts' for editors, 'publish_posts' for authors.

Should I use wp_query or $wpdb directly?

Always use WordPress APIs (wp_query, get_posts) when possible. They handle sanitization and caching automatically. Direct $wpdb queries are rarely needed.

What's the most common security vulnerability?

Unescaped output (XSS attacks). Always use esc_html(), esc_attr(), or esc_url() when displaying user data or variables.

Do I need a security plugin?

Security plugins add extra protection, but following WordPress security best practices (covered in this tool) prevents most attacks.

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About WordPress Security Checker

How to use WordPress Security Checker

Browse Security Issues

Review Details

Copy Code

Implement

Key features

Learn Security Basics

Code Examples

Prevent Common Attacks

Improve Code Quality

Build User Trust

Plugin Directory Ready

Related Articles

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WordPress Security Best Practices: Complete Vulnerability Assessment Guide 2025

WordPress Shortcodes: Complete Guide to Creating & Using Custom Shortcodes

WordPress Functions Reference: Essential PHP Functions for Developers

WordPress Theme Development: Complete Guide to Creating Custom Themes

WordPress Plugin Development: Complete Guide to Creating Custom Plugins

Frequently Asked Questions

Related Tools

Download WordPress Boilerplate Theme

Download WordPress Plugin Boilerplate

WordPress Custom Post Type Builder

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How to use WordPress Security Checker

Browse Security Issues

Review Details

Copy Code

Implement

Key features

Learn Security Basics

Code Examples

Prevent Common Attacks

Improve Code Quality

Build User Trust

Plugin Directory Ready

Related Articles

Complete Guide to WordPress Custom Post Types: Building Custom Content Structures in 2025

WordPress Security Best Practices: Complete Vulnerability Assessment Guide 2025

WordPress Shortcodes: Complete Guide to Creating & Using Custom Shortcodes

WordPress Functions Reference: Essential PHP Functions for Developers

WordPress Theme Development: Complete Guide to Creating Custom Themes

WordPress Plugin Development: Complete Guide to Creating Custom Plugins

Frequently Asked Questions

Related Tools

Download WordPress Boilerplate Theme

Download WordPress Plugin Boilerplate

WordPress Custom Post Type Builder

WordPress Shortcode Generator