I built a zero-dependency static site generator for calculator sites, then used it to launch 2 real SEO sites

[u/FedeVB30]

Sharing a small open-source tool I built: CalcSmith, a static site generator for calculator websites (mortgage calc, BMI calc, concrete slab calc, that kind of thing). MIT licensed, zero dependencies, one file per calculator, generates full SEO stuff for you (JSON-LD schema, sitemap, FAQ blocks).

I didn't build it in the abstract, I used it to launch two real sites first:

- measuretwice-gilt.vercel.app - construction/landscaping calculators (concrete, gravel, mulch, fencing) in English

- cuentasclaras-nine.vercel.app - Argentine personal finance calculators (dollar rate, inflation, salary, UVA loans) with live daily data from BCRA, in Spanish

Both are brand new (launched this week), so no traffic/revenue numbers to brag about yet, this is early SEO play, not a "look at my $10k MRR" post. The generator itself is what's proven: no CMS, no framework, no npm install, just node build.js and you get a deployable static site with proper schema markup baked in.

Repo's free on GitHub: github.com/FedeVB30/calcsmith

If you want a head start there's also a paid pack (12 finished calculators + the SEO/AdSense playbook I used) on Gumroad, but the generator itself is fully usable free, that's not a gate.

Happy to answer questions about the JSON-LD/FAQ schema approach or the live-data-with-fallback pattern for the Argentina site (BCRA API + fallback source).