I built an AI SEO audit tool that fits in a single HTML file - no install, no subscription

Hey r/IMadeThis👋

Just shipped my first Gumroad product and wanted to share it here for feedback.

**The problem I was solving:**

Small business owners and freelancers have no idea why their site doesn't show

up on Google. Professional SEO audits cost $500+. Free tools give you a wall

of numbers with zero context.

**What I built:**

A single HTML file you open in your browser. Paste any URL, click Analyze —

you get in under 60 seconds:

- A SEO score out of 100

- The exact issues blocking your ranking (with their impact explained)

- Keywords you should be targeting (with estimated search volumes)

- Content pieces to create to attract traffic

- A prioritized 6-step action plan (quick wins → long term)

**The twist:**

It works with a free Groq API key — no credit card required.

You can also plug in OpenAI, Anthropic, or Gemini if you already have one.

Your API key stays in your browser. Nothing goes through my servers.

**Tech:**

Pure HTML/CSS/JS. No framework, no backend, no database.

The whole thing is one self-contained file.

**What I learned building it:**

Keeping it to a single file was the right call —

zero friction for the end user, zero infrastructure cost for me.

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Happy to answer questions about how it works or the tech behind it.

And if you try it, brutal feedback welcome 🙏

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