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
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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 -
Plain AI Guides
Plain-English AI how-tos for people running a small business or working for themselves, with no technical background assumed.
plainaiguides.com -
Waymark
Day-by-day guides to the world's great walking routes.
waymarkroutes.com -
Doodlewhirl
Free original coloring pages and tracing sheets, plus a paint tool that runs in the browser.
doodlewhirl.com -
Puzzlekin
Original riddles grouped by age band, to solve on screen or print at home.
puzzlekin.com
Everything above is live on its own domain today. More is in build, and each one joins the list when it launches.