What does an AI website audit check?

The AI Website Audit CLI checks seven areas: SEO meta tags (titles, descriptions, headings), content quality and keyword usage, page structure and HTML semantics, performance indicators (load time, resource size), link integrity (internal/external/broken), accessibility basics, and security headers. Each area gets a 0-100 score, and the AI generates a tailored improvement plan.

Do I need an OpenAI API key to use the AI audit feature?

Yes, the AI report feature uses OpenAI's Responses API (gpt-5.5). You'll need an OpenAI API key with billing enabled. The deterministic scoring and extraction run entirely locally and don't need any API key. You can set OPENAI_STORE_RESPONSES=false to keep your data from being stored by OpenAI.

Can this tool handle large websites with hundreds of pages?

Yes, the CLI is designed for scale. It analyzes every page you point it at — there's no page limit. For large sites, the extraction phase runs asynchronously and the AI report summarizes the whole site. Just be mindful that the OpenAI API calls will incur costs proportional to the number of pages.

AI Website Audit: Free Open-Source CLI Tool for SEO Audits

Name: AI Website Audit CLI
Author: Tools2U

You Know Your Site Needs an SEO Audit. But the Tools Are a Mess.

Let’s be real — running a proper website audit usually means either paying for a SaaS tool you’ll use once, wrestling with a bloated desktop app, or stitching together five different free tools that each give you one piece of the puzzle. And none of them tell you what to actually do with the results.

That’s where AI website audit tools should shine, but most “AI SEO” products are just ChatGPT wrappers with a pretty UI and a $29/month price tag. You deserve something better: a tool that’s powerful, transparent, and actually free.

The Problem: SEO Auditing Is Stuck in 2019

Here’s what drives me nuts about the current SEO audit landscape:

Screaming Frog SEO Spider — Powerful, but the free version is capped at 500 URLs. The paid license? £149/year. And it’s Java-based, closed-source.
Sitebulb — Gorgeous reports, but pricing starts at $15/month for the Lite plan. The “Cloud” plan is $95/month. Ouch.
Google Lighthouse — Free and built into Chrome, but it’s a single-page analyzer. It doesn’t crawl your site, check internal links, or generate an SEO-specific action plan.
SEMrush / Ahrefs — Amazing for competitive analysis, but their site audit features are locked behind $100+/month plans.

The common thread? Every single one is either capped, expensive, closed-source, or missing AI-powered recommendations. Meanwhile, a free website audit tool that’s actually comprehensive doesn’t seem to exist — until now.

What Is the AI Website Audit CLI?

It’s an open-source Python CLI that turns any URL into a structured audit package: full page extraction, deterministic scoring across seven SEO-critical areas, and an AI-powered strategy report. It’s the closest thing to an open source SEO audit that actually competes with paid tools.

Here’s the kicker: the extraction and scoring run entirely on your machine. No data is sent anywhere unless you want the AI report (which uses OpenAI’s Responses API with gpt-5.5). And if you set OPENAI_STORE_RESPONSES=false, even the AI report is privacy-first.

The project is MIT-licensed, sits at github.com/Tools2U/AI-Website-Audit-CLI, and has a growing community of early adopters (about 10 stars and climbing). You can read the full story on Dev.to.

Key Features That Make This AI Website Audit Stand Out

Deterministic Scoring (0–100): Seven audit areas — SEO meta tags, content quality, page structure, performance, link integrity, accessibility, and security headers. Every score is reproducible.
AI-Powered Strategy Report: The AI doesn’t just rehash your scores — it reads the extracted data and produces a tailored improvement plan with prioritized actions.
Multiple Output Formats: Markdown for documentation, HTML for sharing, JSON for automation. Pick your poison.
Crawl Everything: No 500-URL limit. Audit your entire site, not just the homepage.
Privacy-First Design: Extraction and scoring are fully local. AI calls are optional and controllable via environment variables.
One-Command UX: No install wizards, no onboarding flow. python -m ai_website_audit audit https://example.com and you’re done.

How It Stacks Up Against the Competition

Feature	AI Website Audit CLI	Screaming Frog	Sitebulb	Google Lighthouse
Price	Free (MIT)	£149/yr (paid)	$15–$95/mo	Free
Open Source	Yes	No	No	Partial
AI Strategy Report	Yes (gpt-5.5)	No	No	No
Unlimited URLs	Yes	500 (free)	Yes (paid)	Single page
Deterministic Scoring	Yes (7 areas)	Yes	Yes	Performance only
Privacy Controls	Full local option	Local-only	Local + Cloud	Browser-based

If you’re looking for a free website audit tool that pairs deterministic code with AI thinking, nothing else in this table does what this CLI does.

How to Run Your First AI Website Audit in 3 Minutes

You don’t need to be a DevOps pro. Here’s the full tutorial:

Step 1: Install the package
pip install ai-website-audit

Step 2: Run an audit (no API key needed for extraction + scoring)
python -m ai_website_audit audit https://yoursite.com

Step 3: Add AI strategy (set your OpenAI key and re-run)

export OPENAI_API_KEY=sk-...
python -m ai_website_audit audit https://yoursite.com --ai-report

Step 4: Read your reports — Markdown, HTML, and JSON land in an audit-output/ folder.
open audit-output/report.html

That’s it. No signup. No credit card. Just you, your terminal, and an AI website audit that actually tells you what to fix.

What Early Users Are Saying

The project is young but growing fast. Check out the GitHub repo for the latest updates, issues, and contributor discussions.

Frequently Asked Questions About AI Website Audits

How to audit a website for SEO free?

Install the AI Website Audit CLI with pip install ai-website-audit, then run python -m ai_website_audit audit https://your-site.com. You get a full extraction, deterministic scoring across seven areas, and optional AI strategy — all for free. It’s the best free website audit tool for developers who want actual data, not marketing fluff.

What does an AI website audit actually check?

Seven areas: SEO meta tags (titles, descriptions, headings), content quality and keyword usage, page structure (HTML semantics, heading hierarchy), performance indicators (load time, resource sizes), link integrity (internal, external, broken), accessibility basics (alt text, ARIA), and security headers. Each gets a score of 0–100.

Is this tool better than Screaming Frog or Sitebulb?

It depends. Screaming Frog is more mature for deep crawl analysis, and Sitebulb has prettier visualizations. But neither is open-source, neither has AI strategy reports built in, and both cost money once you need more than basic features. The AI Website Audit CLI is the only open source SEO audit tool that gives you deterministic scores and an AI action plan in one command.

Do I need an OpenAI API key?

Only for the AI strategy report. The extraction and deterministic scoring run 100% locally with no external dependencies. If you want the AI report, you’ll need an OpenAI API key with billing enabled. Set OPENAI_STORE_RESPONSES=false to prevent data storage.

Can I use this for client websites as an agency?

Absolutely. It’s MIT-licensed, so you can use it for unlimited client audits, modify it, bundle it, or embed it in your own tools. The HTML report output is client-ready, and you can brand the output however you like.

Stop Overpaying for SEO Audits. Run an AI Website Audit Today.

I built this tool because I was tired of the gap between “free but limited” and “powerful but expensive.” The AI website audit landscape shouldn’t be a choice between your wallet and your site’s health.

This CLI gives you the deterministic rigor of a professional audit tool and the strategic intelligence of an AI consultant — for zero dollars and zero data compromises. Whether you’re a solo blogger, a startup CTO, or an agency running audits for fifty clients, this free website audit tool scales with you.

It’s open-source, MIT-licensed, and sitting on GitHub waiting for you to clone it. If you find a bug, open an issue. If you want a feature, submit a PR. That’s the whole point of open source SEO audit tools — they belong to the community.

Get Started with AI Website Audit CLI →