Once UI 1.5
When I started my career and built my first design system, I was beyond excited. It took a lot of iterations, learning and 6 months of work to launch it internally. In the next job, I did it again, then at the following job, again… And no matter which company I worked for, 80% of the design system was the same. I’ve decided to work full-time on the design system I’ve always wanted, and today I’m launching and open-sourcing it. You can use it to build Next.js apps faster, and I’ve designed it in a way that it’s hard to go wrong with it: you can choose any settings, and you’ll end up with a…
Once UI 1.5 launched on December 2, 2025 with 302 votes, #68 of 11,628 launches that month and more than 95% of that year's launches.
In plain words
Once UI 1.5 is an open-source design toolkit that provides pre-built interactive and animated UI components for developers. It includes visual effects like weather, particles, and matrix-style dots, plus new chart types optimized for live data and real-time dashboards. Designed for indie builders, the components are implemented in just a few lines of code, allowing creators to build expressive and distinctive product interfaces without extensive engineering effort.
written from the facts on this page · September 2026
From the sources
Once UI 1.5 is about bringing wonder back to UI engineering. We’re introducing new visual effects — weather, particles, matrix-style dots — all drop-in and usable in just a few lines of code. You also get a new generation of chart types built for live data and real-time dashboards. Only in Once UI. A toolkit for indie builders who want their product to feel alive, expressive, and unmistakably theirs.
An open-source design system for indie creators built with Next.js and Supabase. Ship fully functional apps with copy-paste React code: components, blocks, layouts and pages.
In the maker’s words, at launch
When I started my career and built my first design system, I was beyond excited. It took a lot of iterations, learning and 6 months of work to launch it internally. In the next job, I did it again, then at the following job, again… And no matter which company I worked for, 80% of the design system was the same. I’ve…
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