Independent studio

We build small, free tools that are actually worth using.

Sparkfield is the studio behind them. Every product stands on its own — its own name, its own domain, its own audience. Free to use, no signup, no paywall.

What we've shipped

Hearth

Free, sourced calculators for everyday decisions — pets, sleep, and caffeine. Every figure links to where it came from.
hearthcalc.com →
Kilnworks

An AI-operated web studio for small businesses. Fixed price, and you ask for a change in plain words.
kilnworks.studio →
Vibe Coder Daily

Practical fixes and guides for people building with AI coding tools.
vibecoderdaily.com →

More products are in build. Each one is listed here when it launches on its own domain.