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.

QuantumCloud

<h4>SEO Help with llms.txt, AI Analytics, YouTube Subtitle to SEO Article Generator with AI, One Click Turbo AI Content Writer, AI Image Generator and RSS Feed AutoBlogging with OpenAI or Google Gemini</h4>
<p>Powered by OpenAI ChatGPT or Google Gemini AI for <strong>AI content writing</strong> and DALL-E for AI Image Generator, SEO Help is a unique WordPress plugin with various helpful SEO Tools. With SEO Help you can also <strong>curate contents, </strong><strong>turn YouTube video Subtitles to a Blog article using AI</strong>, autoblog, import RSS Feeds to Posts within a few minutes. SEO Help also adds an AI writing tool floating icon on your WordPress backend. We are adding a suite of helpful and unique tools to this plugin that can help your website rank higher in search engines result pages (SERP).</p>
<blockquote>
<p>🚀 For Advanced features <strong>Upgrade to <a href="https://www.dna88.com/product/seo-help-pro/" rel="nofollow ugc">SEO Help Pro!</a> now!</strong><br />
  🚀 <a href="https://www.dna88.com/support-free/" rel="nofollow ugc">Support, Bug Report, Feature Requests</a> – Shoot us a email!</p>
<p>Check out the <a href="https://wordpress.org/themes/seo-help/" rel="ugc">SEO Friendly Blog Theme</a></p>
<p>//-> Try our <strong><a href="https://wordpress.org/plugins/chatbot/" rel="ugc">ChatBot with AI – WPBot</a></strong>. It is an easy to use, Native, No coding required, AI ChatBot to provide Automated Live Chat Support. Use ChatBot to <strong>answer user questions</strong> and also <strong>Lead Generation</strong> from the users using <strong>conversational forms</strong>. It can be also be powered by DialogFlow, Tavily or OpenAI ChatGPT or simply use the built-in features to provide Live support and collect user data.</p>
</blockquote>
<h4>LLMs.txt for AI Bots</h4>
<p>LLMs.txt for AI Bots acts as your site’s digital handshake for AI. It automates the generation of a specialized, AI-ready index that helps high-tier Large Language Models instantly identify and interpret your most valuable pages.</p>
<p>While traditional robots.txt and XML sitemaps were built for old-school search crawlers, modern AI agents require a different approach. As platforms like Perplexity and Claude increasingly browse the live web, they function best with a clean, structured directory of high-priority URLs.</p>
<p>An <code>llms.txt</code> file provides exactly that: a lightweight Markdown or plain-text list of your essential public content. It allows you to group, annotate, and describe your links specifically for AI consumption, moving beyond simple web crawling into true content understanding.</p>
<h4>AI LLM Bot Tracker and AI Bot Traffic Analytics</h4>
<p>Is your website ready for the AI era? <strong>AI LLM Bot Tracker</strong> is a robust AI traffic analytics solution for monitoring how AI LLM systems, search LLM AI Bot crawlers engage with your WordPress site.</p>
<p>As traditional SEO evolves into <strong>LLMO (Large Language Model Optimization)</strong>, understanding how platforms like ChatGPT, Gemini, Perplexity, SearchGPT, and Claude-SearchBot “see” your site is critical. Without this data, you are essentially invisible to the engines that are redefining how users find information.</p>
<p>The AI Traffic Analytics feature is a 24/7 silent sentry, capturing every AI interaction without slowing down your site. From tracking training data scraping to identifying which pages AI models value most, you get a clear picture of your digital footprint in the AI ecosystem.</p>
<ul>
<li><strong>AI Bot Visit Logs</strong> – Real-time timestamps, bot identities, and specific pages accessed.</li>
<li><strong>Content Valuation</strong> – Identify exactly which parts of your site AI systems are prioritizing for their models.</li>
<li><strong>Scraping Patterns</strong> – See when and how often GPT, Claude, or Gemini are ingesting your data.</li>
<li><strong>Global Origins</strong> – Track the geographic source and IP addresses of AI traffic.</li>
<li><strong>Technical Health</strong> – Monitor response codes (200, 404, etc.) to ensure bots aren’t hitting dead ends.</li>
<li><strong>Automatic Detection of 60+ AI Bots</strong> – Comprehensive coverage including OpenAI (GPTBot, OAI-SearchBot), Anthropic (ClaudeBot), Google (Gemini, Google-Extended), Meta (FacebookBot), and niche research bots like Devin and LinerBot.</li>
<li><strong>Deep Analytics Dashboard</strong> – Filter logs by date, URL, or bot family to spot 30-day trends and “Top Visitor” leaderboards.</li>
<li><strong>CSV Export</strong> – Take your data offline for advanced reporting or stakeholder presentations.</li>
<li><strong>Performance Focused</strong> – Lightweight architecture adds <0.01s to page load time with zero external API calls.</li>
<li><strong>Smart Cache Detection</strong> – Includes built-in guides for configuring bot tracking alongside common caching layers.</li>
<li><strong>Privacy & Compliance</strong> – 100% local data storage. No human tracking and fully GDPR compliant.</li>
<li><strong>Log Management</strong> – Automated log rotation and bulk actions keep your database lean and fast.</li>
</ul>
<p><h4>OpenAI ChatGPT or Google Gemini Powered AI Content Writing</h4>
</p>
<p>With just one click you can quickly and easily generate high-quality content that is optimized for SEO and tailored to fit your brand’s voice. Give your website the boost it needs with CHATGPT or Google Gemini AI Content Writer & Generator!</p>
<p>If you’re looking to give your website an edge in today’s competitive digital landscape, this Gemini or GPT AI Content Writer & Generator plugin could be just what you need. This powerful tool uses advanced natural language processing technology to automatically generate high-quality, engaging content for WordPress sites in minutes. With just a few simple clicks, you can create SEO-friendly posts and pages tailored to match your business’s unique tone of voice.</p>
<p>The ChatGPT/Gemini AI Content Writer & Generator offers a unique way to create and generate relevant, on-topic content quickly and easily. This plugin makes use of state-of-the-art natural language processing technology to understand user input and turn it into meaningful content for various purposes.</p>
<h4>YouTube Subtitle to Blog Article</h4>
<p>Long form YouTube Videos can be an excellent source for your next SEO article. SEO Help makes this easy. Not only can you extract the full subtitle from any YouTube video, you can also rewrite the Subtitle to a SEO friendly article with AI with just one click of a button.</p>
<p><strong>YouTube Video Subtitle to SEO Article</strong> generator with AI is a new and unique feature. If you have any feedback to improve this feature or if you are facing any issues, please <a href="https://www.dna88.com/support-free/" rel="nofollow ugc">let us know</a>. We will take actions ASAP.</p>
<h4>RSS Feed to Post, Autoblogging</h4>
<p>With SEO Help, let your site autoblog from RSS feeds and stay fresh with new content. Simply paste some RSS feed URLs and select the update dates. The plugin will automatically keep populating your WordPress site with fresh contnts regularly. With the SEO Help Pro version you can also select to <strong>Rewrite the RSS feed</strong> contents with OpenAI before posting. SEO Help lets you aggregate unlimited RSS feeds and automatically publish them on your blog. Automatically convert RSS feed items to WordPress posts easily and quickly.</p>
<h4>AI Image Generator with DALL-E</h4>
<p>Generate unique, royalty-free images for your blog and website in seconds with cutting-edge AI image generator. Use your OpenAI API key to generate any type of images you wish at the fraction of the cost of stock photo sites. SEO help uses OpenAI DALL-E to generate images using your OpenAI API key. Download the chosen AI generated image directly to your Media Library.</p>
<h4>Write Better Blog Titles</h4>
<p>This plugin can help you write better Link Bait titles. The included LinkBait title generator will take the WordPress post title as Subject and generate alternative ClickBait titles for you to choose from. You can keep regenerating titles until you find one that you like. Increase your blog article’s CTR with this handy little tool.</p>
<h4>Auto Generate Tags</h4>
<p>Auto Generate relevant tags to help your SEO for your blog post. You can create SEO freindly tags directly from the blog post edit page. Powered by Google.</p>
<h4>Check Broken Links</h4>
<p>SEO Help also provides External Broken Link Checker support. Comprehensive scan for broken external links with options for custom post types, WordPress pages, posts, time scope and post status.</p>
<h4>Quick Scan for External Broken Links</h4>
<p>Quickly check broken links from your default WordPress posts and pages and generate a useful report to fix them. The quick scan broken link checking tool is suitable for relatively smaller number of posts and pages.</p>
<h4>Open external links in a new tab or window</h4>
<p>Just select this option from SEO Help settings and all external links on your website will automatically open in a new browser tab or window. This feature Opens external links in a separate browser tab or window. External links starting with http:// or https://) both are supported.</p>
<h4>Do More with SEO Help Pro!</h4>
<h4>OpenAI ChatGPT or Google Gemini Powered Content Generator</h4>
<p>🚀 Supports both <strong>Google Gemini AI</strong> and <strong>OpenAI </strong>(ChatGPT)<br />
🚀 Generate Text Contents for your Blog with the Click of a Button – Turbo content generator<br />
🚀 Generate Single Articles directly from your Blog post edit page<br />
🚀 Generate BULK articles and schedule each article’s publish time<br />
🚀 Select to auto publish or save in draft<br />
🚀 Generate summeries for Blog Posts automatically using OpenAI ChatGPT. Automatic content summary (summarizer) or TLDR can be helpful for both your readers and SEO. Blog Post Article Summaries are automatically added to your contents and can make your content look fresh to Search Engines if you enable Generate multiple summaries and use them randomly.<br />
🚀 Automatically Create and Insert AI Images inside your articles<br />
🚀 Options to fine tune your articles (How many headings?, Heading Tag, Writing Style, Writing Tone, Image Size, Language, Add Image, Add Tagline, Add Introduction, Add Conclusion, Add Faq, Anchor Text, Target URL, Add Call-to-Action, Call-to-Action Position, Add Keywords, Keywords to Avoid, Make Keywords Bold etc.)<br />
🚀 A Collection of hundreds of ready Prompts for your ideas<br />
🚀 Generate royalty free AI Images with many different options (Artist, Style, Photography, Lighting, Subject, Camera, Composition, Resolution, Color, Special Effects, Size9(up to 4K))<br />
🚀 Save AI Generated images to Media Library with one click<br />
🚀 AI Image Gutenberg Block. Create and Insert Image directly into your blog post<br />
🚀 Generate Meta Description with one click<br />
🚀 Add meta description tag automatically to the page source<br />
🚀 OpenAI playground<br />
🚀 ChatGPT and Google Gemini in WordPress backend<br />
🚀 Humanize article so they do not sound AI written</p>
<h4>YouTube Video Subtitle to SEO Article Generator with AI</h4>
<p>🚀 Generate Articles from YouTube Subtitles. Works Best for Long form Videos<br />
🚀 Rewrite subtitle to a SEO Friendly Blog Article<br />
🚀 Fine tune your articles (How many headings?, Heading Tag, Writing Style, Writing Tone, Image Size, Language, Add Image, Add Tagline, Add Introduction, Add Conclusion, Add Faq, Anchor Text, Target URL, Add Call-to-Action, Call-to-Action Position, Add Keywords, Keywords to Avoid, Make Keywords Bold etc.)<br />
🚀 Directly Generate a Blog Post Draft<br />
🚀 Humanize article so they do not sound AI written</p>
<h4>RSS Feed to Post, Auto Blogging</h4>
<p>🚀 Automatically Import and Convert RSS feed items to WordPress pages, posts, and custom post type.<br />
🚀 Automatically import and aggregate unlimited RSS feeds from unlimited sources<br />
🚀 Schedule RSS Feed to Post according to your need for Autoblogging<br />
🚀 Rewrite RSS feeds with OpenAI AI before publishing to prevent duplicate contents</p>
<h4>SEO Features</h4>
<p>🚀 Outputs all the essential meta tags that are essential for Search Engine Optimization<br />
🚀 Meta tags can be set for each Post type<br />
🚀 Configure Meta Tags Globally and Per Post basis<br />
🚀 Generate and Add Meta Description with one click<br />
🚀 Set the OGP information required for Social Networking Websites such as Facebook and Twitter.<br />
🚀 Customize the meta tag information individually for each post, page, and term.<br />
🚀 Easily set the Google Analytics measurement code and Webmaster Tools verification code.<br />
🚀 Works out of the box</p>
<h4>SEO Optimized Images</h4>
<p>🚀 Dynamically insert SEO-Friendly “alt” and “title” attributes to your images. Simply activate the plugin, provide the pattern, and you are ready to go.<br />
🚀 Dynamically replaces the “alt” and “title” tags. It does not make any changes to the database. This means that if you deactivate the plugin, everything will return to the original settings.<br />
🚀 Insert an image name, a post title and a post category in the “title” and “alt” attributes of the image.</p>
<h4>No-Index Features</h4>
<p>🚀 Easily add a meta-tag for robots noindex tags to parts of your WordPress site as necessary from a central location</p>
<p><strong>Pages and Posts</strong><strong></strong></p>
<p>🚀 Front Page: Block the indexing of the website’s front page.<br />
🚀 Home Page: Block the indexing of the website’s home page.<br />
🚀 Page: Block the indexing of the site’s pages.<br />
🚀 Privacy Policy Page: Block the indexing of the website’s privacy policy page.<br />
🚀 Single Post: Block the indexing of a post on the site.</p>
<p><strong>Taxonomies</strong></p>
<p>🚀 Categories: Block the indexing of the website categories.<br />
🚀 Tags: Block the indexing of the website’s tags.</p>
<p><strong>Dates</strong></p>
<p>🚀 Date: Block the indexing based on any date-based archive pages.<br />
🚀 Day, Month, Time, Year: Block the indexing for daily, monthly, by time, or yearly archive of the site.</p>
<p><strong>Archives</strong></p>
<p>🚀 Archive: Block the indexing of any type of Archive page. Category, Tag, Author and Date based pages etc. are all types of Archives.<br />
🚀 Author: Block the indexing of the author’s page, where the author’s publications appear.<br />
🚀 Post Type Archive: Block the indexing of any post type page.</p>
<p><strong>Pagination and Search</strong></p>
<p>🚀 Pagination: Block the indexing of the pagination, i.e. all pages other than the main page of an archive.</p>
<p>🚀 Search: Block the indexing of the internal search result pages.</p>
<p><strong>Attachments and Previews</strong></p>
<p>🚀 Attachment: Block the indexing of an attachment document to a post or page.<br />
🚀 Customize Preview: Block the indexing when a content is being displayed in customize mode<br />
🚀 Preview: Block the indexing when a single post is being displayed in draft mode.</p>
<p><strong>Error Page</strong></p>
<p>🚀 Error 404: This will cause an error page to be blocked from being indexed. As it is an error page, it should not be indexed per se, but just in case.</p>
<h4>Other Features</h4>
<p>🚀 Works with all  modern browsers<br />
🚀 Scan for Broken Links on your website<br />
🚀 Open External links in new window<br />
🚀 Priority, Premium Support<br />
🚀 Auto Upgrades for Plugin</p>
<p><a href="https://www.dna88.com/support-free/" rel="nofollow ugc">Support, Bug Report, Feature Requests</a> | Grab the <a href="https://wordpress.org/themes/seo-help/" rel="ugc">Pagespeed Friendly SEO Help Theme</a> |<strong>Upgrade to <a href="https://www.dna88.com/product/seo-help-pro/" rel="nofollow ugc">SEO Help Pro!</a></strong></p>
<h4>More SEO Tools Coming Soon</h4>
<p><strong>This is a work in progress. We are actively working on adding more features. </strong></p>
<blockquote>
<p>If you have any feedback, bug report or feature wishlist please leave a comment in the support forum. Thanks!</p>
</blockquote>
<h4>Who is it for?</h4>
<p>SEO Help is a must have plugin for you if you are a:</p>
<ul>
<li>Blogger</li>
<li>SEO specialist</li>
<li>Content Curator</li>
<li>Marketer</li>
<li>Webmaster</li>
</ul>
<h4>How does it help you?</h4>
<p>Attractive Titles make people click on your link. Increased CTR helps your page rank higher in Google search results. Check for broken links and remove them from your website for better SEO or Search Engine Optimization.</p>
<h3>Use</h3>
<ol>
<li>After activating the plugin, Go to SEO Help->Settings and activate the features you want</li>
<li>Go to Add or Edit a Post/Page – you will see SEO Help blocks on the right of your Editor.</li>
</ol>


QC SEO Help for llms.txt, AI Analytics, AI Content Writer, Subtitle to Article

SEO Help with llms.txt, AI Bot Analytics, AI Content Writer, Autoblogging, Subtitle to Article. OpenAI, Gemini, YouTube Subtitle to Article, Autoblogg …

Link Checker Professional vs QC SEO Help for llms.txt, AI Analytics, AI Content Writer, Subtitle to Article