Once UI

Open-source Next.js design system that cuts your code in half

Unclaimed

Added Jul 2026

once-ui.com

Nextjs StartersFreenextjs-starters

Visit Once Ui

Share: X in LinkedIn

Add your screenshot here

Image or video shown in this spot

Get Verified · $10 lifetime

Follow Once Ui

What is Once Ui?

Once UI is an open-source design system for Next.js apps that helps developers write 70% less code with human-readable, machine-writable syntax. It provides 100+ pre-styled components, semantic layout tools (Row, Column, Grid), and centralized theme management. Designed for developers and design engineers building products, apps, portfolios, and community sites who want to ship faster without sacrificing code clarity.

Explore Once Ui

Need help implementing Once UI?

Find verified specialists who work with Once UI

Browse specialists

Key Features of Once Ui

100+ pre-styled, open-source components
Semantic layouts with Row, Column and Grid
Human-readable, machine-writable syntax
Centralized theme and style management in single file
Deployment-ready templates and blocks
Copy-paste blocks for custom solutions

Who Should Use Once Ui?

Build Next.js apps with less boilerplate code

Create semantic, maintainable layout structures

Deploy production-ready web apps instantly

Design AI-friendly codebases for coding agents

Build portfolios, community sites, and landing pages

Standardize design systems across teams

Once Ui: Pros & Cons

✓Pros

Reduces code by 70% compared to traditional approaches
Open-source and freely available
Machine-writable syntax optimized for AI agents
Pre-built, deployment-ready templates
Comprehensive documentation
Active community with 2.4k+ live contributors

Frequently Asked Questions about Once Ui

What is Once UI?

Once UI is an open-source design system exclusively for Next.js apps that includes 100+ pre-styled components, semantic layout tools, and centralized theme management.

How much code can I save using Once UI?

Once UI helps you write 70% less code compared to traditional approaches through human-readable, machine-writable syntax.

Is Once UI free?

Once UI Core is free and open-source. A Pro version with deployment-ready apps and templates is also available.

What does Once UI include?

Once UI includes a design system core, templates, pre-built blocks, comprehensive documentation, and a roadmap of future features.