What is a WordPress plugin detector?
A WordPress plugin (or extension) is a software module that adds functionality to a WordPress site: contact forms, SEO, e-commerce, security, caching, popups… Each plugin leaves recognizable technical traces in a site’s source code: file paths, scripts, stylesheets, specific headers.
The Twaino WordPress plugin detector analyzes any URL and identifies active extensions on a site in seconds — without admin access, no installation required. Free, no sign-up, and unlimited use.
Level: 🟢 Accessible to all · Price: 💸 100% free · Usage: 🌐 Online, no installation
How to use the WordPress plugin detector
Paste the WordPress site address to analyze in the field above. The tool accepts any public page from the site.
The tool explores the page’s source code and cross-references known technical signatures from thousands of WordPress extensions.
Identified extensions display in seconds, often with their version number.
How does plugin detection work?
WordPress plugins don’t announce themselves openly. The tool relies on several technical signals to identify them reliably:
- Characteristic file paths: each plugin stores its scripts and styles in
/wp-content/plugins/plugin-name/, a directory directly readable in the source code. - JavaScript scripts and CSS stylesheets loaded by the page, whose names and paths reveal the original extension.
- Specific HTML tags: some plugins inject recognizable comments, attributes, or CSS classes.
- HTTP headers added by security, caching, or performance extensions.
- Version numbers present in static file URLs, which sometimes allow precise identification of the installed version.
The combination of these clues enables reliable detection, even when a site has disabled default WordPress metadata.
💡 Our tip
If a plugin you suspect doesn’t appear in the results, it may not load any files on the analyzed page — especially for backend plugins (backups, import tools…). Try analyzing another page of the site to get a more complete list.
Why identify the plugins on a WordPress site?
Knowing the extensions used by a WordPress site opens concrete applications, both in SEO and competitive intelligence:
| ✅ SEO & Technical side | 🎯 Business & Intelligence side |
|---|---|
| • Identify the SEO plugin in use (Yoast, Rank Math, AIOSEO…) • Spot caching and performance tools • Detect security or GDPR compliance plugins • Frame an SEO audit more accurately |
• Replicate a high-performing competitor’s technical stack • Evaluate a site’s SEO maturity before acquisition • Qualify a prospect for a WordPress project • Compare tools used in your industry |
To dig deeper into WordPress site analysis, start by verifying its platform with the CMS detector, then identify its theme with the WordPress theme detector before launching this plugin analysis.
The most frequently detected WordPress plugins
+59 000
plugins available in the official WordPress.org directory
Among the extensions most often found on analyzed WordPress sites are:
- SEO: Yoast SEO, Rank Math, All in One SEO Pack
- Performance & caching: WP Rocket, W3 Total Cache, LiteSpeed Cache
- Security: Wordfence, iThemes Security, Sucuri
- E-commerce: WooCommerce and its official extensions
- Forms: Contact Form 7, Gravity Forms, WPForms
- Page builders: Elementor, Divi, Beaver Builder
Each of these plugins leaves distinct signatures in the code — making their detection particularly reliable with this tool.
✅ Key takeaway
The WordPress plugin detector reveals active extensions on a site in seconds based on their technical signatures. A useful reflex for competitive analysis, prospect qualification, and scoping a WordPress SEO audit.
Frequently asked questions
Is the WordPress plugin detector free?
Yes, the tool is completely free and can be used without registration or analysis limits. Simply enter the URL of a WordPress site to get the list of detected plugins. Twaino offers this tool as part of its free SEO tools suite.
Does the tool detect all plugins installed on a site?
The tool detects plugins that load files visible in the source code of the analyzed page. Purely backend extensions — such as backup or import plugins — emit no frontend traces and cannot be detected. Analyzing multiple pages on the site allows you to expand the results.
Can you identify the version of a detected plugin?
In many cases, yes. URLs of static files loaded by a plugin often contain a version parameter (?ver=x.x.x). The tool returns this information when available in the source code, which can be useful in assessing whether a site is using up-to-date extensions or potentially vulnerable ones.
Why identify the plugins of a competitor?
Knowing a competitor site’s plugin stack helps you understand their technical choices: which SEO plugin they use, how they manage performance, security, or e-commerce. This is valuable information for benchmarking your own WordPress configuration or identifying areas for improvement as part of an SEO audit.
Should you first verify that the site runs on WordPress?
Yes, the plugin detector is designed exclusively for WordPress sites. If you’re unsure about the technology used, start with the CMS detector to confirm the platform, then use this tool to analyze extensions. On a non-WordPress site, no plugins will be detected.