How I Built 7 Free Tools Without a Backend (And Why)

This site has 7 free tools. Every single one runs entirely in your browser. No server, no database, no monthly API bills. Here’s how and why.

The 7 Tools

• SEO Meta Tag Generator — paste your URL, get optimized meta tags
• Robots.txt Generator — visual builder for crawler rules
• Project Cost Estimator — estimate web dev project pricing
• Platform Quiz — 7 questions to pick Shopify or WordPress
• SEO Audit — runs 15+ checks on any URL
• Health Score — grades your site’s overall health
• PDF Merger — combine PDFs in-browser

The Architecture

They’re all static HTML + vanilla JavaScript, bundled with Vite. A couple of them (SEO Audit and Health Score) call Python API backends I host on Vercel’s free tier — but the UI itself is static files. The PDF Merger is the most extreme example: it uses pdf-lib (compiled to WebAssembly) to manipulate PDFs with zero server contact.

Why No Backend?

Three reasons:

Zero hosting cost. These tools are just static files served from Vercel’s edge network. No databases to maintain, no server processes to monitor, no monthly bills.

Privacy by design. Your files never leave your machine. The PDF merger, meta tag generator, and estimator all process everything locally. No uploads, no storage, no data leaks.

No maintenance. I push the code once and it works until browsers stop supporting the APIs I’m using. No security patches, no database migrations, no uptime monitoring.

The Trade-Offs

Serverless is great until you need real processing power. I can’t do server-side scraping, generate PDFs server-side, or run heavy computations. The SEO Audit’s Python backend handles the server-side checks, but everything else stays client-side. It’s a constraint I’ve learned to work within.

Want to try them? Head to the tools page and pick one.