design tools worth keeping open
the small things you reach for mid-project — a type scale, a palette that actually passes contrast, the spacing ramp, the law you half-remember. free, no signup, no email wall. built by Julien Hosri while teaching this material.
use these now
- referenceUX laws & heuristics
30 psychology principles and Nielsen's 10 heuristics, defined and attributed.
open →August 20, 2026 - generatorType scale generator
Build a modular type scale, see it set in real copy, copy the CSS or Tailwind.
open →August 20, 2026 - generatorColor scheme generator
Generate harmonies from any base color and check every pair for contrast.
open →August 20, 2026 - system8pt grid system
Why interfaces snap to 8, the full spacing ramp, and what to do on a 4px screen.
open →August 20, 2026
being built
this list is the roadmap, not a wishlist — each one ships when it's genuinely better than what's already free on the web.
- Navigation patternsEvery way to move through an interface — and when each one stops working.planned
free, and yours to use
every tool here is free to use, including for commercial work. nothing is gated behind an email. whatever you generate — a scale, a palette, a spacing ramp — is yours, no attribution required.
where a tool is built on someone else's research, that research is credited on the tool itself with a link to the source. koalia doesn't reprint other people's writing.
found a bug, or want something on the queue? julien@koalia.design.