FluentValidation is a popular .NET library offering a fluent, expressive interface for building strongly-typed validation rules. It supports modern .NET runtimes including .NET 8+, and integrates smoothly into ASP.NET Core, Blazor, and other ecosystems.

Features

  • Fluent syntax for defining property validation rules (e.g., RuleFor, NotEmpty, EmailAddress)
  • Advanced features: RuleSets, cascade mode, conditional validation, collections (RuleForEach)
  • Dependency Injection support for validator classes
  • Asynchronous validation capabilities
  • Extensibility with custom validators, error codes, localization, state, severity settings
  • Integration with ASP.NET Core and Blazor for model validation and UI enforcement

Project Samples

FluentValidation Screenshot 1

Project Activity

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Categories

Libraries

License

Apache License V2.0

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Additional Project Details

Programming Language

C#

Related Categories

C# Libraries

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4 days ago
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