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 Swagger UI Themes for ASP.NET Core

SwaggerUI.Themes elevates your API documentation with stunning themes and advanced customization.

Note: GIF framerate is limited. Actual transitions are buttery smooth!

Compatible with Swashbuckle and NSwag, this library integrates effortlessly to transform usability and style—no hassle, just great results!

Warning

Version 3.x Breaking Changes

Upgrading from v2.x? Please review the Migration Guide for important API changes.

Note

This documentation reflects SwaggerUI.Themes v3.x. For older versions, see the Migration Guides.

Quick Start

using AspNetCore.Swagger.Themes;

// Apply a theme - that's it!
app.UseSwaggerUI(Theme.Dark);    // Swashbuckle

app.UseSwaggerUi(Theme.Dark);    // NSwag

View full getting started guide →

Why SwaggerUI.Themes?

🎨 Ready-Made Themes - Professional themes ready to use out of the box
🎯 Zero Configuration - Works out of the box with sensible defaults
🔥 Runtime Theme Switching - Let users choose themes dynamically
🔧 Fully Customizable - CSS variables, custom themes, and standalone themes
⚡ Performance-Optimized - Minified cached resources by default

Explore all features →

Documentation

Getting Started:

• Installation & Setup - Quick start guide

Theming:

• Predefined Themes - Browse built-in themes
• Custom Themes - Create your own
• CSS Variables - Fine-tune appearance

Advanced:

• Advanced Options - UI enhancements and features
• Features Overview - Complete capabilities reference
• Migration Guides - Upgrade from older versions

Community & Support

• 💬 Questions? Open an issue on GitHub
• 🐞 Found a bug? Please report it
• 💡 Feature ideas? Share it here