Wednesday I had 0 tools and no domain name. Today I have 75 live developer tools at aidevhub.io. All free, no ads, all client-side, nothing leaves your browser.
I want to talk about how that happened. Not in a "look how easy it is" way, but in a "here's the actual workflow and where it broke" way.
The setup
I run OpenClaw on a Mac Mini in my apartment. It's basically a co-founder that never sleeps. It monitors my trading bots, manages cron jobs, handles research... and apparently, it can crank out React components.
The idea was simple: build a dev tools hub. JSON formatter, base64 encoder, the stuff every developer Googles 3 times a week. But also some AI-specific tools I kept wanting and couldn't find good free versions of.
What I actually did vs what the AI did
I'll be honest about the split:
Me:
- Picked the tech stack (Astro + React islands + Tailwind + Cloudflare Pages)
- Decided which 75 tools to build and in what order
- Defined the design system (colors, spacing, component patterns)
- Architecture decisions: how tools link to each other, SEO structure, page layouts
The AI agent (Rusty):
- Wrote the React components (42 initially, then I pushed to 75)
- Generated all the Astro page wrappers
- Built the search system (Cmd+K, keyboard navigation, ARIA labels)
- Created the tool metadata registry (categories, keywords, descriptions)
- Structured data markup for every tool page
The tool suite nobody else has (that I know of)
The standard dev tools are fine. JSON formatter, regex tester, whatever. Every tool site has those.
What I'm more interested in are the AI-specific ones:
LLM Token Counter - Paste text, get token estimates for GPT, Claude, Gemini, Llama..
AI Model Comparison - Every model's specs, pricing, context window, release date in one table. Sortable, filterable. No more checking 5 different pricing pages.
AI Cost Estimator - "If I run 10,000 requests/day at 2K tokens each through Claude Sonnet, what's my monthly bill?" Answers that in 2 seconds.
MCP Server Directory - A browsable catalog of Model Context Protocol servers. MCP is still new enough that there's no good directory for this.
Agent Framework Comparison - LangChain vs CrewAI vs AutoGen vs Mastra vs the rest. Features, languages, maturity, community size. Updated regularly.
The numbers
- 75 tools across 5 categories (developer, AI, converter, generator, security)
- Largest JS bundle: 58 KB gzipped
- Build time: ~2 seconds
- Hosting cost: $0/month (Cloudflare Pages free tier)
- Domain: $45/year (.io)
- Total time: ~1 week of evening sessions
What's next
More tools, obviously. I have a backlog of about 25 more to get to 100. Some need backend services (webhook inspector, API latency tracker), so those are coming in phase 2 as Cloudflare Workers.
I'm also planning Chrome extensions for some of the tools that make more sense as browser add-ons.
Check it out and let me know what you think: aidevhub.io
No login, no tracking, no "upgrade to premium" popups. If there's a dev tool you wish existed, I'm genuinely curious what it is. The whole point of this project is to build what people actually need.
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