# How I Built 15 SEO Tool Sites Solo: My GEO Content Factory SOP > Source: > Published: 2026-05-29 11:13:58+00:00 I started building English tool sites in early 2026. The goal was simple: **build sites that get indexed by both Google AND AI Overviews, with minimum cost.** 4 months later, I have 15 tool sites under one domain (deepfms.com) — converters, dev tools, USB-C calculators. Some are doing 200+ daily PV. Some got cited by AI Overview within days. Here's my complete SOP, soup to nuts. ## 1. Keyword Research: Not every keyword is worth your time ### The Core Metric: KGR (Keyword Golden Ratio) - **KGR < 0.25**: Green light. New sites can rank. - **KGR 0.25 ~ 1**: Doable but needs solid content. - **KGR > 1**: Don't bother. Established sites own the SERP. ### My Research Process - **Start with a scenario, not a tool** - ❌ "I want to build a PDF compressor" - ✅ "What online tools do people need when building a resume?" **Pull keyword lists** — SEMrush, Ahrefs, or free tools like Ubersuggest **Manually check Google's top 10** — If the top results are old/broken sites, that's your signal **Calculate KGR** — Filter for <0.25 **Reverse-engineer low-authority competitors** — Find their feature gaps ### Real Keyword Examples (All KGR < 0.25) | Keyword | KGR | Verdict | | usb-c to ethernet adapter not working | 0.12 | ✅ Go | | usb-c docking station keeps disconnecting | 0.08 | ✅ Go | | usb-c cable types explained | 0.18 | ✅ Go | ## 2. Building: Static sites, cheap and fast Once you pick a keyword, **don't write a blog post. Build a tool page instead.** ### Why Tool Sites? - **AI loves tools**: When someone searches "convert kg to lbs", AI Overviews cite a working converter, not a 2000-word article - **Higher dwell time**: Open tool → use → copy result. That's 40+ seconds of engagement. - **Google favors utility**: Core Web Vitals updates have been kind to tool pages over content-only pages ### Stack Every tool is a single `.html` file. Self-contained. No framework, no build step. ## 3. GEO Injection: Make AI cite you GEO (Generative Engine Optimization) isn't replacing SEO. It's **complementing** it. SEO targets Google rankings. GEO targets AI Overview citations. ### My GEO Checklist (every page must have all 8) ### Key Technique - **Answer-direct**: Structure content to give the answer immediately. No fluff intros. - **Credibility markers**: Include real test data. "Verified 100+ conversions" beats theory every time. - **Niche down**: Don't chase broad terms. Target "specific person + specific scenario + specific problem". ## 4. Deployment: Cloudflare Pages ### Why Cloudflare Pages - **Free**: Bandwidth limits are generous for tool sites - **CDN**: 330+ data centers, T1 latency - **Auto HTTPS**: No certificate management - **One-click rollback**: Screw up? 30 seconds to restore ### Deploy (three commands) ## 5. Real Data (2 months in) | Metric | Data | | Total sites | 15 | | Fastest Google indexing | 3 days | | AI Overview citations | 4 sites | | Daily total PV | 200+ (growing) | | Build time per site | 2-4 hours | ## 6. Real Case Study: AI Humanizer While building these sites, I noticed a problem: I was writing lots of content with AI, but readers could tell. So I built an [AI Humanizer tool](https://deepfms.com/devtools/ai-humanizer/) that does two things: - **Detect** — Paste AI text, identify 30+ AI tells ("it's worth noting", "furthermore", "in today's world"), give an AI score - **Humanize** — One-click replacement of AI patterns with natural language This tool itself was built using the same GEO SOP: keyword research ("make AI text sound human" KGR < 0.25), static page, GEO injection (FAQ Schema + structured data), CF Pages deploy. Idea to launch: 2 hours. ## 7. The Solo Dev Playbook The core advantage of this system is **reproducibility**: - **One keyword list feeds N sites** (batch by niche) - **Template-driven development** — swap copy and variables - **GEO standards in one script** — batch-inject schemas across all pages - **Cheap iteration** — a site from keyword research to deploy in 2-4 hours ### What's Next - GEO content writing service (per-article, bundled with the AI Humanizer tool) - AI private deployment for local businesses (FDE model) *Built with deepfms.com — free online tools for developers. Check out the *[AI Humanizer](https://deepfms.com/devtools/ai-humanizer/) if you write with AI.