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.