Purlbot – SEO, Security & Site Health

Purlbot is an SEO, security, performance, and site health plugin designed to help you optimize your website for search engines and AI-powered search and answer engines.

Instead of installing multiple plugins for essential website optimization tasks, Purlbot combines key SEO and site management tools into a single lightweight solution.

Sitemap

Purlbot generates a sitemap index (sitemap.xml) with simple XML sub-sitemap files, written directly to your site’s root folder instead of being built on every request. That means:

• Sitemaps load instantly, served directly by your web server — no PHP execution overhead per request.
• Easy for Google Search Console and AI agents to read and index your site.
• Automatic regeneration whenever you publish, edit, or delete content.
• Covers posts, pages, custom post types, and taxonomies — you choose which.
• A human-readable version is also available at /sitemap, grouped by content type, for visitors browsing your site.

Robots.txt

Granular control over which search engines and AI crawlers (Googlebot, GPTBot, ClaudeBot, PerplexityBot, and more) may access your site, plus standard WordPress crawl-hardening rules. Directly editable, and always takes priority over other SEO plugins — even if Yoast, Rank Math, or another plugin is also active. If a robots.txt file already exists on your site, Purlbot shows it to you as-is and will not modify it until you explicitly save from the Robots.txt page.

Optional modules (off by default, enable from Purlbot → Settings)

Sitemap and Robots.txt are always on — everything else stays off until you turn it on, so Purlbot stays genuinely lightweight:

• llms.txt & humans.txt — editable files for AI assistants and site credits, with local “Smart Fill” (no AI, no network calls) and an optional “open in ChatGPT” prompt helper.
• Performance — Disable Emojis/Embeds/Feeds/jQuery Migrate, DB Cleanup Lite (expired transients + old revisions).
• Security — security headers, disable file editing, hide WordPress version.
• Redirects — redirect manager with exact and wildcard matching, hit counter, and a 404 monitor.
• SEO, AEO & GEO Audit — audits your homepage: instant on-page checks (title/meta length, headings, schema, links, images) computed locally in PHP, plus a short list of judgment checks (does this read like a direct answer? is there a clear summary?) run one at a time by a small AI model loaded directly in your browser via the bundled, Apache-2.0-licensed WebLLM engine.
• Meta Title & Description — a metabox on every post/page with SEO title, meta description with a SERP preview, canonical URL, noindex, social share (Open Graph/Twitter) fields, and a per-page schema type override with an editable JSON-LD preview.
• Schema Markup — automatic JSON-LD structured data (Organization, WebSite, Article/WebPage, breadcrumbs) on every page.
• Image SEO — finds images in your Media Library missing alt text, with a one-click filename-based auto-fill (no AI, so it’s instant).
• Content Freshness — lists published content untouched for 12+ months, oldest first.

A note on Meta Title & Description and Schema Markup: to avoid duplicate/conflicting <title>, meta description, canonical, and structured-data tags, these two modules only output their tags when no other SEO plugin (Yoast, Rank Math, All in One SEO, SEOPress) is active. Fields still save either way, so nothing is lost if you later disable the other plugin.

External requests disclosure: none of this makes external network requests by default. The one exception is the SEO, AEO & GEO Audit’s AI judgment checks, which are entirely optional (off unless you enable the module and click “Run Audit”): the first time you run them, your browser downloads an open-source AI model’s weights (several GB) from MLC AI’s own CDN and caches them locally; every check after that runs fully offline, in your browser, and no page content is ever sent to Purlbot or any third party for this feature. The separate “open in ChatGPT” links elsewhere in the plugin simply open a URL in a new browser tab — Purlbot itself never calls any AI API.

External Services

This plugin’s optional SEO, AEO & GEO Audit module (off by default — see “Optional modules” above) includes a set of “AI judgment checks” that run entirely inside your own browser, not on our servers or any server we operate. To do this, when you click “Run Audit” on that page for the first time, your browser downloads an open-source language model (Llama-3, via the bundled Apache-2.0-licensed WebLLM engine) directly from:

• Hugging Face (huggingface.co) — model weights
• GitHub (raw.githubusercontent.com, via the mlc-ai/binary-mlc-llm-libs repository) — the matching WebAssembly runtime library for your device

No page content, site data, or personal data is sent to us as part of this. The only data that leaves your browser is the standard HTTP request each of those hosts needs to serve the file (e.g. your IP address, as with any file download), governed by their own terms:

• Hugging Face: Terms of Service / Privacy Policy
• GitHub: Terms of Service / Privacy Statement

The instant on-page checks (title/meta length, headings, schema, links, images) run locally in PHP on your own server and never contact any external service. The “Open in ChatGPT” buttons found on the Audit and llms.txt pages are plain links that open chatgpt.com in a new browser tab with a pre-filled prompt for you to run yourself — Purlbot does not call ChatGPT or any OpenAI API on your behalf.