Marco Beierer

<p>The <a href="https://www.marcobeierer.com/wordpress-plugins/link-checker" rel="nofollow ugc">Link Checker</a> for WordPress uses an external service to crawl your website and find broken links and images on your website.</p>
<p>In contrast to search engine tools like the Google Search Console, which only show if a URL on your website is not reachable, it does not matter for the Link Checker if the links leads to an internal or external URL. The Link Checker will find all dead links.</p>
<p>The Link Checker works for every plugin out of the box. The computation costs for your website is also very low because the crawler does the heavy work and just acts like a normal visitor, who visits all pages of you website once.</p>
<h4>Out of service</h4>
<p>It’s no longer possible to purchase tokens for the Link Checker as of mid-January 2023.</p>
<p>The service is still available for all users that have already purchased a token and will be shutdown when the last issued token expires mid-January 2024.</p>
<h4>Paid plugin</h4>
<p>Please note that the Link Checker requires a paid token to operate. The free version is no longer offered.</p>
<h4>Videos</h4>
<p>You can find videos about the Link Checker on the <a href="https://www.youtube.com/watch?v=8rUFDp09tjs&list=PL5VYcNma6nfxIrlbpz0f1avXT_JIrUZA1" rel="nofollow ugc">Link Checker for WordPress playlist on YouTube</a>.</p>
<span class="embed-youtube" style="text-align:center; display: block;"><iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/8rUFDp09tjs?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent&listType=playlist&list=PL5VYcNma6nfxIrlbpz0f1avXT_JIrUZA1" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe></span>
<h4>Features</h4>
<ul>
<li><strong>Simple setup</strong>.</li>
<li><strong>Works out of the box</strong> with all WordPress plugins.</li>
<li><strong>Low computation costs</strong> for your webserver.</li>
<li>Lists all broken links and redirects on your website.</li>
<li>Support for Polylang (probably also WPML) sites.</li>
</ul>
<h4>Technical Features</h4>
<ul>
<li>Respects your robots.txt file (also the crawl-delay directive).
<ul>
<li>You can use the user-agents MB-LinkChecker to control the crawler.</li>
</ul>
</li>
</ul>
<h4>Additional Features of the Professional Version</h4>
<ul>
<li>Check if embedded internal and external <strong>images</strong> are broken.</li>
<li>Check if embedded <strong>YouTube videos</strong> are broken.</li>
<li>Scheduler to <strong>automatically check a website</strong> once a day and get a summary report by email.</li>
<li>The result can be exported as CSV file.</li>
<li>Form login support to check protected pages like membership areas.</li>
<li>The result is saved on the Link Checker server so that it can be fetched multiple times without requiring a recheck. For example from different users or with different browsers.</li>
</ul>
<h4>Upcoming Features</h4>
<ul>
<li>Support for checking the availability of videos, CSS files and JS files.</li>
</ul>
<h4>Technical Requirements</h4>
<ul>
<li>Works with <strong>PHP 5.6 and 7</strong>.</li>
</ul>
<h4>Is the service free of charge?</h4>
<p>The Link Checker Professional is a paid plugin. A free version was offered for many years, but since August 2022 only a paid version is available.</p>
<p><a href="https://www.marcobeierer.com/wordpress-plugins/link-checker-professional" rel="nofollow ugc">Link Checker Professional</a></p>
<h4>Use of an External Server</h4>
<p>The Link Checker uses an external server, operated by the developer of the plugin, to crawl your website and detect broken links. This means, that there is some communication between your website and the server. The only data that is communicated to the external server by your website is the URL of your website and the fact that you are using WordPress. The server than crawlers your website (as a normal visitor does) and answers with a list of the found broken links.</p>


Link Checker Professional

EDITED REVIEW: 2021.03.10 
The free plugin works, but stops before it can finish being useful. 500 links is simply not enough for a free version. It doesn't provide a free tier that's functional for most medium-sized websites. You end up having to buy it to actually use it. That makes this more of an advertisement than an actual plugin. I'm using a different plugin.

EDITED 2021.03.11
See my reply dated today.

	EDIT: The free plugin only checks 500 links. This is entirely useless, even for medium-sized sites.
	EDIT: Plugin registration consists of link allotments, with the minimum being 25K links checked in one go for ~50 Euros. It goes up drastically from there because Marco's server is the one doing the crawling.
	Most target websites are small, hosted on huge commercial properties optimized for WordPress. Additionally, crawling the local site may not be as optimal as scraping each post's content field for links and storing results locally.
	My server should be the one doing the work. If my server is doing the work, you can't expect me to pay by the link for a service my server is doing. Period.
	An example of a per unit subscription model that works is Mailchimp. Their servers are doing the work in a trusted secure environment so that my web host box doesn't become a shadow spambot. Offloading that service to mailchimp is not sketchy, and their terms are more than generous for small to mid-sized website admins, with a free tier that is actually commodious. That's not what's happening with this plugin.
	It checks every link on every page, even footer links that repeat across the entire site, so if you have a link like "theme created by...", that link counts on every page against your priced link count. Absurd.
	Worse, it counts a number of known valid links as broken.
	WordPress plugins in the .org library should offer a reasonable modicum of usefulness out of the gate. It should not seem hampered to the site admin. The pro version should offer additional capabilities that make the free plugin seem more complete. This plugin offers only a glimpse of what the paid plugin might do if you are willing to pay 45 euros minimum to check 25K links. You want to check more links? Buy more tokens.
	EDIT: Given the Author's (Marco Beierer) balanced response, I'll say this would better serve the WP community and Marco himself by:

 	scraping post content directly for links rather than crawling, 
	removing the tier caps -- including for the free version -- and then 
	Price the pro version between $50 and $100 for a single-tier paid version that also includes image and youtube link checking.
	Also for the pro version, add the ability to check all site menu links, sidebar/footer/widget links, post content for custom post-type links, custom field links, etc.

This would give the expected additional capability along with unrestricted link checking found in the free version.

A great plugin makes the free-plugin adopter feel like they're getting such a bargain they feel guilty for not supporting the plugin with either a donation or an upgrade to the pro version.

Bait and Switch - Pretty much forced to buy if you want to use.

An easy to use link checker for WordPress to detect broken links and images on your website.

TorontoDigits

<p><strong>SEO Repair Kit v2.1.6</strong> by <a href="https://www.torontodigits.com" rel="nofollow ugc">TorontoDigits</a> helps WordPress site owners find and fix practical SEO issues from one dashboard.</p>
<p>It combines technical SEO checks, metadata controls, crawling controls, monitoring tools, and Search Console insights, so you can improve visibility without relying on multiple plugins.</p>
<h4>Why SEO Repair Kit?</h4>
<p>Unlike single-purpose SEO plugins, SEO Repair Kit focuses on <strong>practical SEO fixes and monitoring</strong> in one place — including broken links, missing alt text, metadata, schema, and search performance.</p>
<p>This makes it ideal for:<br />
* SEO agencies managing multiple clients<br />
* Content-heavy websites<br />
* Businesses looking for actionable SEO improvements</p>
<h4>Core Features</h4>
<p><strong>Meta Manager</strong><br />
* Manage SEO titles and descriptions globally and per content type<br />
* Configure robots directives (including max preview directives)<br />
* Override metadata on individual posts/pages<br />
* Supports Gutenberg and Elementor workflows<br />
* Supports dynamic template tags like <code>%title%</code>, <code>%excerpt%</code>, and <code>%site_title%</code></p>
<p><strong>Schema Manager (Pro)</strong><br />
* Build and manage JSON-LD schema with visual controls<br />
* Supports common schema types such as Article, FAQ, Product, Event, Course, JobPosting, Review, and more<br />
* Validate and preview mappings before output</p>
<p><strong>Link Health Tools</strong><br />
* Scan internal and external links for HTTP status issues<br />
* Export findings to CSV<br />
* Create redirects from problem URLs</p>
<p><strong>Redirection + 404 Monitoring</strong><br />
* Create and manage 301/302 redirects<br />
* Track redirect hits and logs<br />
* Monitor 404 errors with actionable details<br />
* Convert recurring 404 URLs into redirects quickly</p>
<p><strong>KeyTrack (Search Console Insights)</strong><br />
* Works with Google Site Kit/Search Console<br />
* View clicks, impressions, CTR, and average position<br />
* Analyze page/query trends in one place<br />
* Configure threshold-based reporting workflows</p>
<p><strong>Sitemap Manager</strong><br />
* Include/exclude post types and taxonomies from WordPress core sitemap<br />
* Keep <code>wp-sitemap.xml</code> focused on important content<br />
* Note: this controls only core WordPress sitemap output</p>
<p><strong>Bot Manager</strong><br />
* Edit and validate <code>robots.txt</code><br />
* Generate and manage <code>llms.txt</code><br />
* Allow/block selected AI crawlers</p>
<p><strong>Alt Text Manager</strong><br />
* Identify images missing alt text<br />
* Update alt text records efficiently</p>
<p><strong>Weekly SEO Summary</strong><br />
* Receive scheduled email summaries with key SEO status metrics<br />
* Includes Search performance, link health, image alt coverage, and redirect insights</p>
<h3>Configurations & Use</h3>
<h4>Initial Setup & Onboarding</h4>
<ol>
<li>After activating the plugin, you’ll be guided through an interactive onboarding process.</li>
<li>During onboarding, you can configure:
<ul>
<li>Post types to scan for broken links</li>
<li>Enable/disable KeyTrack feature</li>
<li>Set up link scanning schedule (manual, weekly, or monthly)</li>
<li>Select default schema types to use</li>
<li>Configure notification preferences (weekly reports, KeyTrack alerts, broken links notifications)</li>
<li>Enable alt text scanning</li>
<li>Enable redirection management</li>
<li>Set notification email address</li>
</ul>
</li>
<li>Complete the onboarding to save your preferences, or skip and configure later in Settings.</li>
</ol>
<h4>Dashboard Overview</h4>
<ol>
<li>Navigate to “SEO Repair Kit” in your WordPress admin menu to access the main dashboard.</li>
<li>The dashboard provides:
<ul>
<li>Site SEO Analysis with issue detection (critical, warning, suggestion)</li>
<li>Quick access widgets for all major features</li>
<li>Real-time status updates</li>
<li>SEO health score calculations</li>
<li>Direct links to fix identified issues</li>
</ul>
</li>
<li>Use the “Re-check Status” button to refresh the analysis.</li>
</ol>
<h4>Broken Link Scanner</h4>
<ol>
<li>Go to “SEO Repair Kit” > “Link Scanner” in the admin menu.</li>
<li>Select a post type from the dropdown (configured in Settings).</li>
<li>Click “Scan Links” to start the scanning process.</li>
<li>Monitor the progress bar and real-time statistics during scanning.</li>
<li>Review the results table showing:
<ul>
<li>Post ID, title, and type</li>
<li>Link URL and HTTP status code</li>
<li>Link text context</li>
<li>Direct edit and redirect options</li>
</ul>
</li>
<li>Export broken links to CSV for external analysis.</li>
<li>Create redirects directly from the scan results.</li>
<li>Schedule automatic scans in Settings (weekly or monthly).</li>
</ol>
<h4>Alt Text Manager</h4>
<ol>
<li>Navigate to “SEO Repair Kit” > “Image Alt Missing” in the admin menu.</li>
<li>View all images missing alt text with their details.</li>
<li>Update alt text individually:
<ul>
<li>Click on an image to edit</li>
<li>Enter descriptive alt text</li>
<li>Save changes</li>
</ul>
</li>
<li>Use bulk update feature to update multiple images at once.</li>
<li>Filter and search images by post type or status.</li>
<li>Monitor alt text optimization progress and statistics.</li>
</ol>
<h4>Redirection Manager</h4>
<ol>
<li>Go to “SEO Repair Kit” > “Redirection” in the admin menu.</li>
<li>Create a new redirect:
<ul>
<li>Enter source URL (old URL)</li>
<li>Enter target URL (new URL)</li>
<li>Select redirect type (301 Permanent or 302 Temporary)</li>
<li>Optionally enable regex pattern matching</li>
<li>Set redirect status (active/inactive)</li>
<li>Save the redirect</li>
</ul>
</li>
<li>View all redirects in a comprehensive table showing:
<ul>
<li>Source and target URLs</li>
<li>Redirect type and status</li>
<li>Hit count and last hit timestamp</li>
<li>Position for ordering</li>
</ul>
</li>
<li>Edit or delete existing redirects.</li>
<li>Monitor most active redirects with hit analytics.</li>
<li>Use the redirect logs to track redirect performance.</li>
</ol>
<h4>404 Error Monitor</h4>
<ol>
<li>Navigate to “SEO Repair Kit” > “404 Manager” (or access via Link Scanner).</li>
<li>Enable 404 monitoring in Settings if not already enabled.</li>
<li>View all 404 errors with details:
<ul>
<li>Requested URL</li>
<li>Referrer information</li>
<li>User agent and IP address</li>
<li>Access count and timestamps</li>
</ul>
</li>
<li>Create redirects directly from 404 logs:
<ul>
<li>Select a 404 error</li>
<li>Choose target URL</li>
<li>Create redirect with one click</li>
</ul>
</li>
<li>Filter 404 errors by domain, date, or count.</li>
<li>Monitor 404 trends and patterns.</li>
</ol>
<h4>Sitemap Control</h4>
<ol>
<li>Go to <strong>SEO Repair Kit <span aria-hidden="true" class="wp-exclude-emoji">→</span> Sitemap Control</strong></li>
<li>Enable the option <strong>“Enable Sitemap Control”</strong></li>
<li>Select the post types you want to include (Posts, Pages, Custom Post Types, etc.)</li>
<li>Select the taxonomies you want to include (Categories, Tags, custom taxonomies)</li>
<li>Click <strong>Save Sitemap Settings</strong></li>
</ol>
<p>Only the selected items will remain in your WordPress core sitemap.</p>
<p>Tip: If your sitemap is not opening, go to <strong>Settings <span aria-hidden="true" class="wp-exclude-emoji">→</span> Permalinks</strong> and click “Save Changes” to refresh it.</p>
<h4>Bot Manager</h4>
<ol>
<li>
<p>Navigate to “SEO Repair Kit” > “Bot Manager” in the admin menu.</p>
</li>
<li>
<p><strong>LLMs.txt Management</strong></p>
<ul>
<li>Generate an llms.txt file for AI model discovery</li>
<li>Select post types and taxonomies to include</li>
<li>Allow or block specific AI bots</li>
<li>Preview and edit the generated file</li>
<li>Your file will be available at: yoursite.com/llms.txt</li>
</ul>
</li>
<li>
<p><strong>Robots.txt Management</strong></p>
<ul>
<li>Edit robots.txt using the visual editor</li>
<li>Validate syntax and preview changes</li>
<li>Apply enhanced SEO and security rules</li>
<li>Reset to WordPress recommended defaults</li>
<li>Available at: yoursite.com/robots.txt</li>
</ul>
</li>
<li>
<p><strong>AI Bot Access Control</strong></p>
<ul>
<li>Allow or block AI crawlers such as GPTBot, Claude, Gemini, Perplexity, Bing Chat, and others</li>
<li>Blocked bots receive a 403 response</li>
<li>Blocking rules are automatically added to robots.txt</li>
</ul>
</li>
<li>
<p><strong>Additional Features</strong></p>
<ul>
<li>Real-time robots.txt validation</li>
<li>Automatic sitemap detection</li>
<li>Built-in security rules</li>
<li>Easy reset to default configuration</li>
</ul>
</li>
</ol>
<h4>KeyTrack – Keyword Performance Tracking</h4>
<ol>
<li>Install and activate Google Site Kit plugin (required for KeyTrack).</li>
<li>Connect Google Site Kit to your Google Search Console account.</li>
<li>Go to “SEO Repair Kit” > “KeyTrack” in the admin menu.</li>
<li>Create a KeyTrack configuration:
<ul>
<li>Enter a name for your KeyTrack</li>
<li>Select keywords to track</li>
<li>Choose date range for analysis</li>
<li>Configure threshold settings (optional)</li>
<li>Save configuration</li>
</ul>
</li>
<li>View performance data in multiple tabs:
<ul>
<li><strong>Overview</strong>: Summary metrics (clicks, impressions, CTR, average position)</li>
<li><strong>Pages</strong>: Top performing pages with detailed metrics</li>
<li><strong>Queries</strong>: Top search queries with performance data</li>
<li><strong>Settings</strong>: Manage KeyTrack configurations</li>
</ul>
</li>
<li>Set up email reports:
<ul>
<li>Configure threshold alerts</li>
<li>Set report frequency</li>
<li>Add recipient email addresses</li>
</ul>
</li>
<li>Analyze trends with interactive line charts.</li>
<li>Export data for external analysis.</li>
<li>Watch the demo video: <span class="embed-youtube" style="text-align:center; display: block;"><iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/uiWgcazUDcc?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe></span></li>
</ol>
<h4>Schema Manager (Pro Feature)</h4>
<ol>
<li>Ensure you have an active Pro license (required for Schema Manager).</li>
<li>Navigate to “SEO Repair Kit” > “Schema Manager” in the admin menu.</li>
<li>Select a schema type from the available options (15+ types supported).</li>
<li>Configure schema assignment:
<ul>
<li>Choose post types to apply the schema</li>
<li>Map content fields to schema properties</li>
<li>Enable/disable specific schema fields</li>
<li>Preview the JSON-LD output</li>
</ul>
</li>
<li>Save the schema configuration.</li>
<li>The schema will automatically be injected into your pages as JSON-LD markup.</li>
<li>Validate schema using Google’s Rich Results Test tool.</li>
<li>Manage multiple schema types for different content types.</li>
<li>Use the visual field mapper to easily configure complex schemas.</li>
</ol>
<h4>Meta Manager</h4>
<ol>
<li>
<p>Navigate to “SEO Repair Kit” > “Meta Manager”.</p>
</li>
<li>
<p>Configure SEO using these tabs:</p>
<p><strong>Global Meta</strong></p>
<ul>
<li>Set title separator, homepage SEO title & description</li>
<li>Configure default SEO templates and knowledge graph</li>
</ul>
<p><strong>Content Types</strong></p>
<ul>
<li>Define title and description templates for posts, pages, and CPTs</li>
<li>Configure robots directives</li>
</ul>
<p><strong>Taxonomies</strong></p>
<ul>
<li>Set SEO templates for categories, tags, and custom taxonomies</li>
<li>Control indexing behavior</li>
</ul>
<p><strong>Archives</strong></p>
<ul>
<li>Manage SEO settings for author, date, and search archives</li>
</ul>
<p><strong>Advanced Settings</strong></p>
<ul>
<li>Configure robots directives (index/noindex, follow/nofollow, preview limits)</li>
<li>Default robots: <code>index, follow, max-image-preview:large</code></li>
<li>Disable default to manually select directives</li>
<li>Respects WordPress <strong>Settings <span aria-hidden="true" class="wp-exclude-emoji">→</span> Reading <span aria-hidden="true" class="wp-exclude-emoji">→</span> Discourage search engines</strong> option</li>
</ul>
</li>
<li>
<p>Save settings to apply SEO metadata automatically.</p>
</li>
<li>
<p>Override metadata per post/page using the <strong>SEO Repair Kit Meta Manager</strong> box.</p>
</li>
<li>
<p><strong>Editor Support</strong></p>
<ul>
<li>Works with Gutenberg and Elementor editors.</li>
</ul>
</li>
<li>
<p>Per-page options include:</p>
<ul>
<li>Custom SEO title</li>
<li>Meta description</li>
<li>Robots directives</li>
<li>Canonical URL</li>
<li>Search result preview</li>
</ul>
</li>
<li>
<p>If custom metadata is not defined, Meta Manager automatically applies the global template settings as a fallback.</p>
</li>
</ol>
<h4>AI Chatbot (Pro Feature)</h4>
<ol>
<li>Ensure you have an active Pro license.</li>
<li>Navigate to “SEO Repair Kit” > “AI Chatbot”.</li>
<li>Ask the AI assistant for SEO guidance, troubleshooting, and optimization tips.</li>
</ol>
<p>The chatbot can help with:<br />
* Meta Manager configuration and SEO metadata guidance<br />
* Schema Manager setup<br />
* Redirection and broken link fixes<br />
* KeyTrack keyword tracking insights<br />
* General SEO best practices</p>
<p>It provides context-aware responses and real-time suggestions directly inside the WordPress dashboard.</p>
<h4>Settings Configuration</h4>
<ol>
<li>Go to “SEO Repair Kit” > “Settings” in the admin menu.</li>
<li><strong>Post Types Settings</strong>:
<ul>
<li>Select which post types to scan for broken links</li>
<li>Choose from all public post types</li>
<li>Save your selection</li>
</ul>
</li>
<li><strong>404 Monitoring Settings</strong>:
<ul>
<li>Enable or disable automatic 404 error tracking</li>
<li>404 errors will be logged when enabled</li>
</ul>
</li>
<li><strong>Weekly Report Email Settings</strong>:
<ul>
<li>Enable or disable weekly SEO summary emails</li>
<li>View last report status and timestamp</li>
<li>Reports are sent to your admin email address</li>
</ul>
</li>
<li>Save all settings to apply changes.</li>
</ol>
<h4>Weekly SEO Summary Email</h4>
<ol>
<li>Enable weekly reports in Settings (enabled by default).</li>
<li>Reports are automatically sent every week to your admin email.</li>
<li>Each report includes:
<ul>
<li>Search performance metrics from KeyTrack</li>
<li>Broken links analysis and health scores</li>
<li>Image alt text optimization status</li>
<li>Redirection statistics and analytics</li>
<li>Pro plan status and upgrade information</li>
</ul>
</li>
<li>Reports are sent in beautiful HTML format with:
<ul>
<li>Visual charts and metrics</li>
<li>Actionable insights</li>
<li>Direct links to fix issues</li>
<li>Dashboard access links</li>
</ul>
</li>
<li>View the last report status in Settings to verify delivery.</li>
</ol>
<h4>Advanced Features</h4>
<ol>
<li>
<p><strong>Analytics & Reporting</strong>:</p>
<ul>
<li>Track redirect hit counts</li>
<li>Monitor 404 error patterns</li>
<li>Analyze KeyTrack performance trends</li>
<li>View comprehensive SEO health scores</li>
</ul>
</li>
<li>
<p><strong>Bot Management</strong>:</p>
<ul>
<li>Control AI crawler access to your content</li>
<li>Generate llms.txt files for AI model discovery</li>
<li>Manage robots.txt with visual editor</li>
<li>Block or allow specific AI bots</li>
<li>Server-level access control</li>
</ul>
</li>
<li>
<p><strong>Integration</strong>:</p>
<ul>
<li>Google Site Kit integration for KeyTrack</li>
<li>Google Search Console data access</li>
<li>REST API endpoints for external integrations</li>
</ul>
</li>
</ol>
<h4>Troubleshooting</h4>
<ul>
<li>If KeyTrack doesn’t show data, ensure Google Site Kit is installed and connected.</li>
<li>If weekly emails aren’t sending, check your server’s mail configuration and email settings.</li>
<li>If schema isn’t appearing, verify your Pro license is active and schema is properly configured.</li>
<li>If links aren’t being detected, ensure the post type is selected in Settings.</li>
<li>Check the plugin’s debug logs for detailed error information.</li>
</ul>


SEO Repair Kit – Meta Manager, Schema Manager, SEO Content Monitoring, GSC Integration, Keyword & Rank Tracking


I got to preview this tool at WordCamp, and I was very impressed. The team provided an excellent demo and from testing the plugin myself I would highly recommend it. 


Great plugin

The ultimate WordPress plugin for SEO automation - from link fixing to AI-powered schema generation and chatbot support.

Link Checker Professional vs SEO Repair Kit – Meta Manager, Schema Manager, SEO Content Monitoring, GSC Integration, Keyword & Rank Tracking