95 projects
React
React is a JavaScript library for building user interfaces. It enables developers to create reusable UI components and efficiently update views when data changes, following a declarative programming paradigm.
Contributors
18,683
Organizations
4,472
Software value
$27M
The Symfony PHP Framework
Symfony is a PHP web application framework designed for building robust, scalable, and maintainable web applications using reusable components and a structured MVC architecture. It’s widely used for enterprise-level projects and forms the foundation of many other PHP platforms, including Laravel and Drupal.
Contributors
16,910
Organizations
3,327
Software value
$67M
Mongoose
Mongoose is an elegant MongoDB object modeling tool designed to work in an asynchronous environment. It provides a straight-forward, schema-based solution to model application data and includes built-in type casting, validation, query building, business logic hooks and more.
Contributors
11,334
Organizations
2,868
Software value
$4.9M
ipython
ipython is a sub-project of Project Jupyter.
Contributors
8,689
Organizations
1,708
Software value
$72M
React Hook Form
React Hook Form is a performant, flexible and extensible forms library for React with easy-to-use validation. It provides efficient form state management and validation with minimal re-renders, leveraging React hooks for form handling and validation with minimal boilerplate code.
Contributors
7,941
Organizations
1,527
Software value
$2M
Pydantic
Pydantic is a data validation library for Python that uses type annotations to enforce data types and structures at runtime. It provides robust parsing, serialization, and validation of data through Python type hints, making it easier to work with complex data models and configurations.
Contributors
7,561
Organizations
1,992
Software value
$4.5M
Formik
Build forms in React, without the tears 😭
Contributors
6,517
Organizations
1,538
Software value
$685K
Zod
Zod is a TypeScript-first schema declaration and validation library that enables runtime type checking, data parsing, and static type inference. It provides a declarative way to define complex data schemas with automatic TypeScript type inference.
Contributors
5,974
Organizations
1,789
Software value
$2.4M
vee-validate
✅ Painless Vue forms
Contributors
4,298
Organizations
744
Software value
$1.1M
jackson-databind
Jackson-databind is a core data-binding package for Jackson, providing functionality to convert between Java objects and various data formats like JSON, XML, YAML, etc. It enables automatic serialization and deserialization of Java objects with extensive configuration options and customization features.
Contributors
4,009
Organizations
922
Software value
$8.6M
Yup
Yup is a JavaScript schema validation library that enables developers to define object schemas with strongly typed validation rules. It provides a fluent API for defining complex validation logic, supports asynchronous validation, and integrates well with form handling libraries.
Contributors
3,279
Organizations
815
Software value
$356K
react-jsonschema-form
A React component library for building HTML forms from JSON Schema specifications, providing automatic form generation and validation based on schema definitions
Contributors
2,919
Organizations
634
Software value
$4M
validator.js
A string validation and sanitization library that provides a comprehensive set of validators and sanitizers for strings, numbers, emails, URLs, and other data types. It supports both server-side Node.js and browser environments.
Contributors
2,755
Organizations
663
Software value
$735K
Joi
Joi is a powerful schema description language and data validator for JavaScript. It allows developers to create blueprints of JavaScript objects that ensure data conforms to specific rules and structures. The library provides a declarative way to validate objects, arrays, strings, numbers, and other data types with a rich set of validation rules and options.
Contributors
2,585
Organizations
787
Software value
$1.5M
Ajv
Ajv is a JSON schema validator for JavaScript/Node.js that implements multiple JSON Schema specifications (Draft-07, Draft-2019-09, Draft-2020-12) and JSON Type Definition (JTD). It provides high performance validation through code generation, supports custom keywords and formats, and can be used both in Node.js and in the browser.
Contributors
2,400
Organizations
742
Software value
$1.4M
class-validator
Decorator-based property validation for classes.
Contributors
2,037
Organizations
533
Software value
$374K
FluentValidation
A popular .NET validation library for building strongly-typed validation rules.
Contributors
1,958
Organizations
267
Software value
$637K
Go Package Validator
A Go package that provides tag-based validation for structs and custom types, supporting both built-in validation rules and custom validation functions. It enables developers to define validation constraints through struct tags and validate data against those rules at runtime.
Contributors
1,621
Organizations
451
Software value
$2.1M
Django Filter
A generic system for filtering Django QuerySets based on user selections
Contributors
1,470
Organizations
446
Software value
$362K
TanStack Form
🤖 Headless, performant, and type-safe form state management for TS/JS, React, Vue, Angular, Solid, and Lit.
Contributors
1,461
Organizations
364
Software value
$2.1M
Marshmallow
Marshmallow is a Python library for converting complex data types to and from native Python data types. It provides object serialization/deserialization, data validation, and schema definition capabilities commonly used for APIs and data processing.
Contributors
1,441
Organizations
414
Software value
$547K
Serde JSON
A high-performance JSON serialization and deserialization library for Rust that integrates with Serde's data model to provide efficient and flexible JSON handling
Contributors
1,157
Organizations
478
Software value
$564K
attrs
attrs is a Python library that helps developers write concise and maintainable classes by automatically adding generated special methods like __init__ and __repr__ to classes. It reduces boilerplate code while providing features like validators, converters, and metadata for class attributes.
Contributors
982
Organizations
360
Software value
$649K
TypeBox
TypeBox is a JSON Schema Type Builder with static type resolution for TypeScript. It allows developers to build JSON Schema types with a TypeScript API, providing runtime type checking and static type inference. The library supports JSON Schema Draft 6 through 2019-09 and includes features like type composition, inference, and validation.
Contributors
797
Organizations
292
Software value
$5.4M
async-validator
validate form asynchronous
Contributors
604
Organizations
116
Software value
$124K
prop-types
Runtime type checking library for React props and similar objects, extracted from React's core functionality into a standalone package to enable independent versioning and maintenance
Contributors
558
Organizations
209
Software value
$149K
Valibot
The modular and type safe schema library for validating structural data 🤖
Contributors
496
Organizations
137
Software value
$7.7M
cattrs
Composable custom class converters for attrs, dataclasses and friends.
Contributors
448
Organizations
173
Software value
$530K
Superstruct
A simple and composable way to validate data in JavaScript (and TypeScript).
Contributors
424
Organizations
149
Software value
$196K
Typeguard
Run-time type checker for Python
Contributors
358
Organizations
156
Software value
$269K
validators
Python Data Validation for Humans™.
Contributors
328
Organizations
100
Software value
$221K
DocArray
The mission of the DocArray project is to develop a library for nested, unstructured, multimodal data in transit, including text, image, audio, video, 3D mesh.
Contributors
309
Organizations
46
Software value
$439M
Hibernate Validator
Hibernate Validator is a reference implementation of the Jakarta Bean Validation specification that enables developers to express and validate application constraints through annotations. It provides a framework for defining and enforcing validation rules on Java beans, with support for method and constructor validation, custom constraints, and integration with other frameworks.
Contributors
278
Organizations
57
Software value
$4.3M
Smithy Kotlin
Smithy is a protocol-agnostic interface definition language and set of tools for generating clients, servers, and documentation for any programming language.
Contributors
96
Organizations
15
Software value
$12M
APISpec
A pluggable API specification generator. Currently supports the OpenAPI Specification (f.k.a. the Swagger specification)..
This project hasn't been onboarded to LFX Insights.
Active Storage Validations
Do it like => validates :photos, attached: true, content_type: ['image/png', 'image/jpg', 'image/jpeg'], size: { less_than: 500.kilobytes }, limit: { min: 1, max: 3 }, aspect_ratio: :landscape, dimension: { width: { in: 800..1600 }
This project hasn't been onboarded to LFX Insights.
Apache Commons Validator
Apache Commons Validator
This project hasn't been onboarded to LFX Insights.
AutoMapper
A convention-based object-object mapper in .NET.
This project hasn't been onboarded to LFX Insights.
CEL for Go
Fast, portable, non-Turing complete expression evaluation with gradual typing (Go)
This project hasn't been onboarded to LFX Insights.
CSLA .NET
A home for your business logic in any .NET application.
This project hasn't been onboarded to LFX Insights.
Cadl
Cadl is a Linux Foundation project focused on developing tools and standards for API design and development, enabling more efficient and consistent API creation across different platforms and programming languages.
This project hasn't been onboarded to LFX Insights.
Cargo Semver Parser and Evaluator
Parser and evaluator for Cargo's flavor of Semantic Versioning
This project hasn't been onboarded to LFX Insights.
Class Transformer
Decorator-based transformation, serialization, and deserialization between objects and classes.
This project hasn't been onboarded to LFX Insights.
Conform
A type-safe form validation library utilizing web fundamentals to progressively enhance HTML Forms with full support for server frameworks like Remix and Next.js.
This project hasn't been onboarded to LFX Insights.
Dataclasses JSON
Easily serialize Data Classes to and from JSON
This project hasn't been onboarded to LFX Insights.
Formily
📱🚀 🧩 Cross Device & High Performance Normal Form/Dynamic(JSON Schema) Form/Form Builder -- Support React/React Native/Vue 2/Vue 3
This project hasn't been onboarded to LFX Insights.
Formio Platform: Data Management for PWAs
A Form and Data Management Platform for Progressive Web Applications.
This project hasn't been onboarded to LFX Insights.
Freezed
Code generation for immutable classes that has a simple syntax/API without compromising on the features.
This project hasn't been onboarded to LFX Insights.
Go-OpenAPI Specification Object Model
openapi specification object model
This project hasn't been onboarded to LFX Insights.
Govalidator
[Go] Package of validators and sanitizers for strings, numerics, slices and structs
This project hasn't been onboarded to LFX Insights.
GraphQL Scalars
A library of custom GraphQL Scalars for creating precise type-safe GraphQL schemas.
This project hasn't been onboarded to LFX Insights.
JMESPath Python
JMESPath is a query language for JSON.
This project hasn't been onboarded to LFX Insights.
JSON Schema Project
JSON Schema specifications, reference schemas, and a CommonJS implementation
This project hasn't been onboarded to LFX Insights.
JSON Schema Ref Parser
Parse, Resolve, and Dereference JSON Schema $ref pointers in Node and browsers
This project hasn't been onboarded to LFX Insights.
JSON Schema for Python
An implementation of the JSON Schema specification for Python
This project hasn't been onboarded to LFX Insights.
JSONEditor
A web-based tool to view, edit, format, and validate JSON
This project hasn't been onboarded to LFX Insights.
Json Everything
System.Text.Json-based support for all of your JSON needs.
This project hasn't been onboarded to LFX Insights.
Laminas Filter
Programmatically filter and normalize data and files
This project hasn't been onboarded to LFX Insights.
Laminas Validator
Validation classes for a wide range of domains, and the ability to chain validators to create complex validation criteria
This project hasn't been onboarded to LFX Insights.
Laravel Data
Powerful data objects for Laravel
This project hasn't been onboarded to LFX Insights.