Best API Documentation Tools for .NET
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Compare the Top API Documentation Tools that integrate with .NET as of December 2025
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This a list of API Documentation tools that integrate with .NET. Use the filters on the left to add additional filters for products that have integrations with .NET. View the products that work with .NET in the table below.
What are API Documentation Tools for .NET?
API documentation tools are software tools that help developers create, maintain, and publish documentation for their Application Programming Interfaces (APIs). These tools streamline the process of explaining how to use an API, providing code examples, and outlining endpoints, parameters, and response formats. Many API documentation tools automatically generate docs from the codebase or integrate with frameworks to keep documentation up to date with API changes. They often include interactive features, like live testing or sandbox environments, allowing developers to experiment with API requests directly from the documentation. Ultimately, these tools improve the developer experience by making it easier to understand and use APIs effectively. Compare and read user reviews of the best API Documentation tools for .NET currently available using the table below. This list is updated regularly.
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Treblle
Treblle
Treblle is a federated API Intelligence platform built for enterprises that need full visibility, control, and security over their APIs. With a single integration, Treblle provides real-time API Discovery, Observability, Analytics, Governance, Runtime Security, and Developer Portals. It supports on-prem and private cloud deployments to meet strict compliance and data privacy requirements. Treblle helps teams shift left by surfacing API issues early in development and ensuring consistency across environments. Its AI-powered Integration Assistant simplifies onboarding and reduces manual effort. Trusted by global enterprises and recognized over 15 times by Gartner, Treblle accelerates innovation while giving you complete control over your API landscape.Starting Price: $25 per month -
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NSwag
Rico Suter
NSwag is a comprehensive Swagger/OpenAPI 2.0 and 3.0 toolchain for .NET, .NET Core, ASP.NET Core, and TypeScript, written in C#. It enables developers to generate OpenAPI specifications from existing API controllers and create client code from these specifications. NSwag combines functionalities similar to Swashbuckle (for OpenAPI/Swagger generation) and AutoRest (for client generation) into a single toolchain, eliminating the need for both. Key features include the ability to generate Swagger 2.0 and OpenAPI 3.0 specifications from C# ASP.NET (Core) controllers, serve these specifications via ASP.NET (Core) middleware with integrated Swagger UI or ReDoc, and generate C# or TypeScript clients/proxies from the specifications. NSwag offers multiple usage methods, including a user-friendly Windows GUI (NSwagStudio), command-line interfaces compatible with Windows, Mac, and Linux, and integration into C# code via NuGet packages.Starting Price: Free -
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Statiq
Statiq
A batteries-included static site generator that's appropriate for most use cases. Use it out-of-the-box or extend it with custom pipelines, data sources, and layouts. Extends Statiq Web by adding support for generating .NET API documentation while still benefiting from all the capabilities of a robust general-purpose static site generator. The framework behind Statiq Web and Statiq Docs with over 100 modules to help you easily build a custom static generator application specifically for your needs. Different types of content require different types of templates, and Statiq has you covered with support for Markdown and Razor (along with plain HTML) with more languages like Handlebars/Mustache and Liquid coming soon. Statiq understands a variety of data formats like YAML, JSON, and XML and is designed to plug any data format into any usage. From data files to front matter use the data format you're most comfortable in.
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