#What is Tremor?

Tremor is a free, open-source React UI library designed to accelerate the development of data-intensive dashboards and charts for web applications. Founded in 2022 by Christopher Kindl and Severin Landolt, its primary goal is to provide developers with modular, accessible components to visualize complex datasets, targeting React developers, SaaS companies, and startups creating analytics dashboards or internal tools. Built with React, Tailwind CSS, Radix UI, and Recharts, Tremor offers over 30 components, including area charts, KPI cards, and filter controls, with full customization via Tailwind and a CLI for setup (tscel init@latest). It supports global theming, dark/light modes, and keyboard navigation for accessibility. For developers seeking rapid dashboard development, Tremor is a perfect fit, delivering production-ready, WAI-ARIA-compliant components with strong community adoption.

#Features ⚡️

• Dashboard Components: 30+ components like area charts, donut charts, and KPI cards for analytics.

• Global Theming: Customize styles via tailwind.config.js with dark/light mode support.

• Accessibility: WAI-ARIA-compliant via Radix UI with keyboard navigation.

• Tremor CLI: Streamlined project setup with tscel init@latest.

• Responsive Design: Tailwind CSS ensures cross-device compatibility.

• Custom Colors: Chart color customization with Tailwind’s color palette.

• Modular Blocks: 300+ copy-paste blocks for charts, tables, and layouts.

• Figma UI Kit: Design components in Figma for prototyping.

#Pros and Cons

#Pros ✅

• Rapid Development: Pre-built components save weeks of custom coding.

• Free and Open-Source: MIT license with no usage restrictions.

• Accessible: Radix UI ensures WAI-ARIA compliance for inclusive UIs.

• Community Adoption: 1.1M npm downloads, 16.5k GitHub stars, used by Vercel.

• Customizable: Tailwind CSS and CLI enable easy theming and setup.

• Active Maintenance: Regular updates (v3.18.7, January 2025) and CLI enhancements.

• Educational Resources: Storybook, Figma kit, and block templates aid development.

#Cons ⚠️

• React-Only: Limited to React/Next.js ecosystems, excluding other frameworks.

• Learning Curve: Requires Tailwind CSS and Recharts knowledge for advanced customization.

• Opinionated Design: Limited color palette and styling may feel restrictive.

• Breaking Changes: Major releases (e.g., v2, v3) introduced breaking changes.

• Documentation Gaps: Theming and advanced customization need clearer guides.

• Recharts Dependency: Chart limitations tied to Recharts’ capabilities.

• Commercial Blocks: Some advanced blocks require a paid plan, unlike open-source core.

#Included Components - Templates

Tremor provides a variety of dashboard components:

• Area Chart: Visualize time-series data with customizable colors.

• Donut Chart: Display categorical data with formatted values.

• KPI Card: Highlight metrics with progress and delta indicators.

• Filter Controls: Modular select, datepicker, and toggle components.

• Table Actions: Sorting, row selection, and pagination blocks.

• Spark Chart: Compact area, line, or bar charts for micro-visualizations.

#Pricing 💸

Tremor operates on a Free model:

• Free Plan: 30+ open-source components under MIT license via npm or GitHub.

#Integrations 🧰

Tremor integrates with:

• React: Core framework for component rendering (v18.2.0+).

• Tailwind CSS: Utility-first styling for responsive design (v4.0+).

• Radix UI: Accessibility primitives for WAI-ARIA compliance.

• Recharts: Charting library for data visualizations.

• Next.js: Compatible with Next.js for full-stack dashboards.

• Vercel: Hosting for demos and CLI integration (tscel).

• Tinybird: Real-time data processing for dynamic dashboards.

• Figma: UI kit for prototyping dashboard designs.

• SWR: Data fetching for real-time updates in dashboards.