# HellSEO > HellSEO audits a website across SEO, AEO (answer engine optimization), and GEO (generative engine optimization), and hands back ready-to-paste code fixes instead of a to-do list. It also publishes a set of free, no-sign-up single-purpose tools for the checks that stand on their own. HellSEO is an independent product. Full audits require a free account (a starting balance of credits, one per audit); the tools under /free-tools require no account at all. ## Product - [HellSEO](https://hellseo.site): Full SEO + AEO + GEO audit — 24 checks, scored 0–100 per axis, with copy-paste fixes for every issue found. ## Free Tools ### SEO Tools - [Robots.txt Checker](https://hellseo.site/free-tools/robots-txt-checker): Check your robots.txt for syntax issues, a missing sitemap declaration, or a site-wide Disallow that's blocking search engines entirely. - [Sitemap Validator](https://hellseo.site/free-tools/sitemap-validator): Validate your sitemap.xml — URL count, sitemap index nesting, malformed entries, and the 50,000-URL limit. Free, no sign-up. - [SERP Preview](https://hellseo.site/free-tools/serp-preview): Preview how your title tag and meta description will look in Google search results, with live character and pixel-width limits. - [Meta Tags Generator](https://hellseo.site/free-tools/meta-tags-generator): Free meta tag generator (meta tag maker/builder) — title, meta description, Open Graph, and Twitter Card tags for your , in one pass. - [Canonical Tag Generator](https://hellseo.site/free-tools/canonical-tag-generator): Free canonical tag generator (canonical tag maker) — generate a canonical tag and optional hreflang alternates for a URL in seconds. - [301 Redirect Generator](https://hellseo.site/free-tools/redirect-generator): Free 301 redirect generator (redirect maker/builder) — .htaccess, Nginx, Next.js, and Cloudflare code from an old URL and a new URL. - [URL Slug Generator](https://hellseo.site/free-tools/url-slug-generator): Free URL slug generator (slug maker) — turn any title into a clean, SEO-friendly slug: lowercase, hyphenated, stop words removed. - [Favicon Checker](https://hellseo.site/free-tools/favicon-checker): Check whether your site has a favicon, where it's declared, and whether it actually loads. Free, no sign-up. - [Mobile Viewport Checker](https://hellseo.site/free-tools/viewport-checker): Check whether your page has a valid mobile viewport meta tag — the baseline requirement for mobile-friendly rendering. Free, no sign-up. ### GEO Tools - [AI Crawler Checker](https://hellseo.site/free-tools/ai-crawler-checker): Check whether your robots.txt blocks GPTBot, ClaudeBot, PerplexityBot, and other AI crawlers from reading your site. Free, no sign-up. - [llms.txt Generator](https://hellseo.site/free-tools/llms-txt-generator): Generate a spec-compliant llms.txt file from your sitemap in seconds — this llms.txt maker/creator is free, no sign-up, no email required. ### AEO Tools - [FAQ Schema Generator](https://hellseo.site/free-tools/faq-schema-generator): Free FAQ schema generator (also called a FAQ schema maker or builder) — turn your Q&As into valid FAQPage JSON-LD, ready to paste into your . - [Organization Schema Generator](https://hellseo.site/free-tools/organization-schema-generator): Free Organization schema generator (Organization schema maker) — name, logo, and sameAs social links, valid JSON-LD ready to paste into your . - [Article Schema Generator](https://hellseo.site/free-tools/article-schema-generator): Free Article schema generator (Article schema maker) — headline, author, publisher, dates. Valid Article/BlogPosting JSON-LD, ready to paste into your . - [Breadcrumb Schema Generator](https://hellseo.site/free-tools/breadcrumb-schema-generator): Free Breadcrumb schema generator (Breadcrumb schema maker) — turn your page hierarchy into valid BreadcrumbList JSON-LD, ready to paste into your . ## Blog - [GPTBot vs OAI-SearchBot: What Each One Actually Does](https://hellseo.site/blog/gptbot-vs-oai-searchbot): GPTBot trains OpenAI's models. OAI-SearchBot powers live ChatGPT search results. Blocking one doesn't block the other — here's how to control each separately. - [Google-Extended vs Googlebot: Why They're Not the Same](https://hellseo.site/blog/google-extended-vs-googlebot): Blocking Google-Extended in robots.txt won't remove you from Google Search — but it will opt you out of training Gemini and appearing in AI Overviews. - [llms.txt in 2026: Does It Actually Do Anything for SEO?](https://hellseo.site/blog/llms-txt-2026-does-it-actually-do-anything): llms.txt isn't an official standard and no major AI system confirms reading it — but it costs nothing to publish once your page registry already exists. - [SEO vs AEO vs GEO: What's Actually Different (With Examples)](https://hellseo.site/blog/seo-vs-aeo-vs-geo): SEO ranks you on Google. AEO gets your answer quoted in a snippet. GEO gets you cited by ChatGPT and Gemini. Here's what each one actually checks for. - [Why Your Backlink Authority Score Won't Budge At All](https://hellseo.site/blog/why-backlink-authority-wont-budge): No plugin or schema tag fixes a low backlink authority score. It's the one audit check with no copy-paste fix — here's what actually moves it. - [Do Question-Based Headings Actually Help AI Cite You?](https://hellseo.site/blog/do-question-based-headings-help-ai-cite-you): AI answer engines lift content shaped like a Q&A pair. We rewrote our own headings as questions in real h2/h3 tags and measured the before/after. - [We Audited Our Own Site With HellSEO — Here's What We Found](https://hellseo.site/blog/we-audited-our-own-site-with-hellseo): We ran HellSEO's own 24-check audit on hellseo.site. SEO scored 93, AEO scored 100, GEO scored 85 — and one check failed outright. Here's the real report. - [The SMB Owner's Guide to Not Getting Buried by AI Search](https://hellseo.site/blog/smb-owners-guide-to-ai-search): ChatGPT, Gemini, and Perplexity now answer questions your customers used to Google. Here's what a small business needs to do to show up in those answers. ## Pages - [Free Tools index](https://hellseo.site/free-tools) - [Blog index](https://hellseo.site/blog) - [About](https://hellseo.site/about) - [Contact](https://hellseo.site/contact) - [Privacy Policy](https://hellseo.site/privacy) - [Terms of Service](https://hellseo.site/terms) - [Cookie Policy](https://hellseo.site/cookies)