97 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
18,912
Organizations
4,546
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
16,961
Organizations
3,345
Software value
$66M
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
11,358
Organizations
2,869
Software value
$5M
ipython
ipython is a sub-project of Project Jupyter.
Contributors
8,693
Organizations
1,719
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
7,981
Organizations
1,543
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
7,641
Organizations
2,014
Software value
$4.5M
Formik
Build forms in React, without the tears 😭
Contributors
6,520
Organizations
1,543
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
6,101
Organizations
1,834
Software value
$2.4M
vee-validate
✅ Painless Vue forms
Contributors
4,311
Organizations
752
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
4,037
Organizations
930
Software value
$8.9M
dbt Core
dbt enables data analysts and engineers to transform their data using the same practices that software engineers use to build applications.
Contributors
4,022
Organizations
614
Software value
$8.7M
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
3,286
Organizations
821
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
2,934
Organizations
637
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
2,771
Organizations
666
Software value
$736K
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
796
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
2,408
Organizations
745
Software value
$1.4M
class-validator
Decorator-based property validation for classes.
Contributors
2,045
Organizations
538
Software value
$374K
FluentValidation
A popular .NET validation library for building strongly-typed validation rules.
Contributors
1,958
Organizations
265
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
1,637
Organizations
459
Software value
$2.1M
Formily
📱🚀 🧩 Cross Device & High Performance Normal Form/Dynamic(JSON Schema) Form/Form Builder -- Support React/React Native/Vue 2/Vue 3
Contributors
1,549
Organizations
174
Software value
$5.6M
TanStack Form
🤖 Headless, performant, and type-safe form state management for TS/JS, React, Vue, Angular, Solid, and Lit.
Contributors
1,520
Organizations
381
Software value
$2.1M
Django Filter
A generic system for filtering Django QuerySets based on user selections
Contributors
1,473
Organizations
448
Software value
$362K
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
1,450
Organizations
420
Software value
$550K
Class Transformer
Decorator-based transformation, serialization, and deserialization between objects and classes.
Contributors
1,420
Organizations
361
Software value
$231K
NJsonSchema
JSON Schema reader, generator and validator for .NET
Contributors
1,364
Organizations
225
Software value
$2.2M
JSON Editor
A web-based tool to view, edit, format, and validate JSON
Contributors
1,325
Organizations
265
Software value
$800K
Freezed
Code generation for immutable classes that has a simple syntax/API without compromising on the features.
Contributors
1,237
Organizations
262
Software value
$584K
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
1,164
Organizations
482
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
978
Organizations
361
Software value
$649K
django-taggit
Django-taggit is a reusable Django application for simple tagging functionality, allowing models to be tagged with keywords. It provides a straightforward API for adding, removing and filtering by tags in Django projects.
Contributors
911
Organizations
330
Software value
$898K
Form.io
A Form and Data Management Platform for Progressive Web Applications.
Contributors
882
Organizations
84
Software value
$3.1M
WTForms
WTForms is a flexible forms validation and rendering library for Python web development. It provides a way to define form fields programmatically, handles data validation, and generates HTML form markup. The library integrates well with various Python web frameworks and supports customizable widgets, field types, and validation rules.
Contributors
868
Organizations
261
Software value
$266K
TypeSpec
TypeSpec is a language for describing cloud service APIs and generating API contracts in formats like OpenAPI, gRPC, and more. It provides a unified way to define APIs with strong typing, inheritance, and composition features, enabling consistent API development across different protocols and platforms.
Contributors
844
Organizations
183
Software value
$39M
Laravel Data
Powerful data objects for Laravel
Contributors
837
Organizations
173
Software value
$1.3M
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
809
Organizations
292
Software value
$5.4M
async-validator
validate form asynchronous
Contributors
602
Organizations
114
Software value
$124K
AutoMapper
A convention-based object-object mapper in .NET.
Contributors
577
Organizations
103
Software value
$1.9M
GoValidator
GoValidator is a package for Go that provides string validation and sanitization functionality. It includes over 100 validators and sanitizers for strings, structs and custom types, supporting features like email validation, URL checking, credit card verification, and more.
Contributors
573
Organizations
191
Software value
$254K
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
559
Organizations
207
Software value
$149K
Typia
Super-fast/easy runtime validators and serializers via transformation
Contributors
536
Organizations
168
Software value
$17M
Phony
E164 international phone number normalizing, splitting, formatting.
Contributors
535
Organizations
137
Software value
$501K
TypeScript JSON Schema Generator
A TypeScript library that generates JSON Schema definitions from TypeScript types, interfaces, and classes. It enables automatic schema generation for TypeScript projects to validate JSON data structures at runtime.
Contributors
526
Organizations
182
Software value
$1.4M
Dataclasses JSON
A Python library that provides JSON serialization and deserialization support for Python dataclasses, allowing seamless conversion between dataclass objects and JSON data
Contributors
521
Organizations
161
Software value
$131K
Valibot
The modular and type safe schema library for validating structural data 🤖
Contributors
507
Organizations
139
Software value
$7.6M
JSON Schema $Ref Parser
A JavaScript library that parses JSON Schema files with support for resolving $ref pointers to external files and URLs. It can bundle multiple JSON Schema files into a single schema that's easy to use programmatically.
Contributors
504
Organizations
185
Software value
$631K
CSLA .NET
A home for your business logic in any .NET application.
Contributors
502
Organizations
22
Software value
$10M
cattrs
Composable custom class converters for attrs, dataclasses and friends.
Contributors
446
Organizations
174
Software value
$546K
json-everything
System.Text.Json-based support for all of your JSON needs.
Contributors
436
Organizations
83
Software value
$2.9M
Superstruct
A simple and composable way to validate data in JavaScript (and TypeScript).
Contributors
423
Organizations
152
Software value
$196K
apispec
A pluggable API specification generator. Currently supports the OpenAPI Specification (f.k.a. the Swagger specification)..
Contributors
377
Organizations
128
Software value
$265K
Typeguard
Run-time type checker for Python
Contributors
359
Organizations
156
Software value
$270K
validators
Python Data Validation for Humans™.
Contributors
329
Organizations
102
Software value
$221K
Common Expression Language (CEL)
Common Expression Language (CEL) is a portable expression language that lets users write simple boolean expressions that can be parsed and evaluated in a variety of programming environments. It provides a secure and efficient way to evaluate expressions without turning them into executable code.
Contributors
323
Organizations
107
Software value
$6.4M
sabre/vobject
A PHP library for parsing and manipulating iCalendar and vCard files, providing functionality to read, write, and manipulate these common data formats used for calendar events and contact information
Contributors
321
Organizations
90
Software value
$1M
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 }
Contributors
317
Organizations
90
Software value
$434K
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
47
Software value
$439M
Beartype
Unbearably fast near-real-time hybrid runtime-static type-checking in pure Python.
Contributors
285
Organizations
102
Software value
$2.9M
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
279
Organizations
57
Software value
$4.3M
Pandera
Pandera is a statistical data testing toolkit that provides a flexible and expressive API for performing data validation on pandas DataFrames. It enables data scientists and engineers to define schema, run statistical checks, and implement data quality tests through a Python interface.
Contributors
264
Organizations
25
Software value
$2.1M
Webmozart Assert
Assertions to validate method input/output with nice error messages.
Contributors
264
Organizations
117
Software value
$232K