1.colinhacks / zod
TypeScript-first schema validation with static type inference
- typescript
- schema-validation
- type-inference
- runtime-validation
- static-types
+1,909 stars
from 42,353 · score 7.55
Trending repositories
Ranked by Attention Score: stars gained over the last 180 complete days
72 repositories by Attention Score · May 9, 2026 – Nov 4, 2026 (UTC)
2.pydantic / pydantic
Data validation using Python type hints
- validation
- parsing
- json-schema
- pydantic
- python
- hints
- +5 more
+1,796 stars
from 27,504 · score 7.49
3.open-circle / valibot
The modular and type safe schema library for validating structural data 🤖
- bundle-size
- modular
- parsing
- schema
- type-safe
- typescript
- +8 more
+501 stars
from 8,551 · score 6.22
4.go-playground / validator
:100:Go Struct and Field validation, including Cross Field, Cross Struct, Map, Slice and Array diving
- validation
- translation
- error-handling
+422 stars
from 19,793 · score 6.05
5.google / libphonenumber
Google's common Java, C++ and JavaScript library for parsing, formatting, and validating international phone numbers.
+407 stars
from 17,935 · score 6.01
6.ajv-validator / ajv
The fastest JSON schema Validator. Supports JSON Schema draft-04/06/07/2019-09/2020-12 and JSON Type Definition (RFC8927)
- json-schema
- validator
- ajv
+217 stars
from 14,653 · score 5.38
7.unionai-oss / pandera
A light-weight, flexible, and expressive statistical data testing library
+202 stars
from 4,308 · score 5.31
8.munich-data-engineering / reflect-cpp
A C++20 library for fast serialization, deserialization and validation using reflection. Supports JSON, Avro, Boost Serialization, BSON, Cap'n Proto, CBOR, Cereal, Command line interfaces, CSV, Environment variables, flexbuffers, msgpack, parquet, TOML, UBJSON, XML, YAML, yas / msgpack.org[C++20]
+136 stars
from 1,833 · score 4.92
9.typestack / class-validator
Decorator-based property validation for classes.
- validation
- validator
- decorators
- typescript
+134 stars
from 11,719 · score 4.91
10.FluentValidation / FluentValidation
A popular .NET validation library for building strongly-typed validation rules.
+134 stars
from 9,635 · score 4.91
11.Respect / Validation
The most awesome validation engine ever created for PHP
- php
- validation
- validation-engine
- fluent-interface
- validator
- standalone
- +1 more
+118 stars
from 5,917 · score 4.78
12.AfterShip / email-verifier
:white_check_mark: A Go library for email verification without sending any emails.
+94 stars
from 1,558 · score 4.55
13.validatorjs / validator.js
String validation
- validation
- sanitization
- javascript
- node
- input
- validator
- +4 more
+92 stars
from 23,650 · score 4.53
14.go-ozzo / ozzo-validation
An idiomatic Go (golang) validation package. Supports configurable and extensible validation rules (validators) using normal language constructs instead of error-prone struct tags.
- validation
- golang
- go
- ozzo
- validator
+88 stars
from 4,067 · score 4.49
+75 stars
from 23,581 · score 4.33
16.python-jsonschema / jsonschema
An implementation of the JSON Schema specification for Python
- json-schema
- json
- validation
- schema
- jsonschema
+70 stars
from 4,923 · score 4.26
17.giggsey / libphonenumber-for-php
PHP version of Google's phone number handling library
- phone-number
- php
- libphonenumber
- hacktoberfest
+63 stars
from 5,011 · score 4.16
18.metosin / malli
High-performance data-driven data specification library for Clojure/Script.
- clojure
- clojurescript
- validation
- modelling
- transformation
- json-schema
- +6 more
+58 stars
from 1,717 · score 4.08
+54 stars
from 21,110 · score 4.01
20.Oudwins / zog
Go with Zod inspired simple schema validation
- error-handling
- golang
- runtime-validation
- schema-validation
- templ
- translation
- +1 more
+52 stars
from 1,168 · score 3.97
21.daviddrysdale / python-phonenumbers
Python port of Google's libphonenumber
+51 stars
from 3,726 · score 3.95
22.marmelroy / PhoneNumberKit
A Swift framework for parsing, formatting and validating international phone numbers. Inspired by Google's libphonenumber.
- phone-number
- google-libphonenumber
- swift
- parsing
- validation
- contacts
- +1 more
+48 stars
from 5,347 · score 3.89
23.FGRibreau / mailchecker
:mailbox: Cross-language temporary (disposable/throwaway) email detection library. Covers 55 734+ fake email providers.
- email-validation
- email-verification
+47 stars
from 1,871 · score 3.87
24.Propaganistas / Laravel-Phone
Phone number functionality for Laravel
- laravel
- libphonenumber
- validation
- phone
+45 stars
from 2,995 · score 3.83
25.gookit / validate
Translated⚔ Go package for data validation and filtering. support Map, Struct, Form data. A general-purpose Go library for data validation and filtering, simple to use, with most commonly used validators and filters built in, and support for custom validators, custom messages, and field translation.
- validation
- validator
- filter
- govalidator
- validate
- verification
+45 stars
from 1,120 · score 3.83
+43 stars
from 11,593 · score 3.78
27.marshmallow-code / marshmallow
A lightweight library for converting complex objects to and from simple Python datatypes.
- serialization
- deserialization
- validation
- python
- marshalling
- serde
- +1 more
+43 stars
from 7,201 · score 3.78
+43 stars
from 276 · score 3.78
29.CuyZ / Valinor
Dependency free PHP library that helps to map any input into a strongly-typed structure.
+36 stars
from 1,497 · score 3.61
30.sindresorhus / is
Type check values
- type-detection
- type-check
- is
- assertions
- typescript
- node-module
- +1 more
+25 stars
from 1,774 · score 3.26
31.asaskevich / govalidator
[Go] Package of validators and sanitizers for strings, numerics, slices and structs
- govalidator
- go
- validation
- validation-library
- sanitization
+24 stars
from 6,177 · score 3.22
32.RicoSuter / NJsonSchema
JSON Schema reader, generator and validator for .NET
+23 stars
from 1,564 · score 3.18
+21 stars
from 3,260 · score 3.09
34.ealush / vest
Vest ✅ Declarative validations framework
- validation-library
- unit-testing
- form-validation
- react-validation-library
- validation
- vue-validation
- +7 more
+21 stars
from 2,648 · score 3.09
+19 stars
from 316 · score 3.00
+16 stars
from 1,630 · score 2.83
37.daddyz / phonelib
Ruby gem for phone validation and formatting using google libphonenumber library data
- ruby
- google-libphonenumber
- phone-validation
- phone-parse
- phone-number
- parsing
+16 stars
from 1,148 · score 2.83
38.wagslane / go-password-validator
Validate the Strength of a Password in Go
- entropy
- strength
- character
- golang-package
- security
- golang
- +2 more
+16 stars
from 576 · score 2.83
39.ianstormtaylor / superstruct
A simple and composable way to validate data in JavaScript (and TypeScript).
- validation
- types
- interface
- structs
- schema
- javascript
- +1 more
+13 stars
from 7,114 · score 2.64
+13 stars
from 3,609 · score 2.64
41.alecthomas / voluptuous
CONTRIBUTIONS ONLY: Voluptuous, despite the name, is a Python data validation library.
+13 stars
from 1,839 · score 2.64
42.dry-rb / dry-types
Flexible type system for Ruby with coercions and constraints
- dry-rb
- types
- coercion
- constraints
- ruby
+13 stars
from 882 · score 2.64
43.plumatic / schema
Clojure(Script) library for declarative data description and validation
+12 stars
from 2,453 · score 2.56
44.nobl9 / govy
Go validation library with functional API built on top of generics, statically typed and batteries included :fire:
- generics
- go
- type-safe
- validation
- error-handling
+12 stars
from 43 · score 2.56
45.beberlei / assert
Thin assertion library for use in libraries and business-model
+11 stars
from 2,415 · score 2.48
46.bids-standard / bids-validator
Validator for the Brain Imaging Data Structure
- bids
- data-standards
- neuroimaging-data
- validation
+11 stars
from 41 · score 2.48
+10 stars
from 1,976 · score 2.40
48.vlucas / valitron
Valitron is a simple, elegant, stand-alone validation library with NO dependencies
- validation
- php
- validator
- hacktoberfest
+10 stars
from 1,588 · score 2.40
49.patrick-kidger / torchtyping
Type annotations and dynamic checking for a tensor's shape, dtype, names, etc.
- tensors
- named-tensors
- shape
- pytorch
- typing
- python-typing
+10 stars
from 1,475 · score 2.40
50.marshmallow-code / webargs
A friendly library for parsing HTTP request arguments, with built-in support for popular web frameworks, including Flask, Django, Bottle, Tornado, Pyramid, webapp2, Falcon, and aiohttp.
+9 stars
from 1,401 · score 2.30
+8 stars
from 275 · score 2.20
+7 stars
from 4,134 · score 2.08
53.zaggino / z-schema
JSON Schema validator written in JavaScript for NodeJS and Browsers
+7 stars
from 342 · score 2.08
54.didww / credit_card_validations
:credit_card: ruby gem for validating credit cards, generating credit card numbers, Luhn checks
- credit-card
- validation
- e-commerce
- rails
+7 stars
from 262 · score 2.08
55.truemail-rb / truemail-go
🚀 Configurable Golang 📨 email validator/verifier. Verify email via Regex, DNS, SMTP and even more. Be sure that email address valid and exists.
- go
- golang
- go-package
- email-validation
- email-verification
- +14 more
+5 stars
from 132 · score 1.79
56.thedevsaddam / govalidator
Validate Golang request data with simple rules. Highly inspired by Laravel's request validation.
- request
- go-request-validation
- validator
- validation
- go-validator
- govalidator
+4 stars
from 1,340 · score 1.61
57.sergiobayona / easy_talk
Ruby library for defining, generating and validating JSON Schema
- anthropic-api
- json-api
- json-schema
- openai-api
- function-calling
- openapi
- +2 more
+4 stars
from 94 · score 1.61
+4 stars
from 82 · score 1.61
59.ronanguilloux / IsoCodes
PHP library - Validators for standards from ISO, International Finance, Public Administrations, GS1, Manufacturing Industry, Phone numbers & Zipcodes for many countries
- gtin
- php
- international-finance
- administrations
- isocodes
- gs1
+3 stars
from 801 · score 1.39
60.peasy / Peasy.NET
A business logic micro-framework for .NET and .NET Core
- architecture
- architectural-patterns
- peasy
- c-sharp
- business-logic
- framework
- +8 more
+3 stars
from 519 · score 1.39
+2 stars
from 9,053 · score 1.10
62.fulcrologic / guardrails
Efficient, hassle-free function call validation with a concise inline syntax for clojure.spec and Malli
+2 stars
from 257 · score 1.10
63.antonagestam / phantom-types
Phantom types for Python.
- phantom-types
- static-analysis
- mypy
- python
- static-typing
- typing
- +5 more
+2 stars
from 233 · score 1.10
64.Clever / csvlint
library and command line tool that validates a CSV file
+2 stars
from 207 · score 1.10
65.doov-org / doov
dOOv (Domain Object Oriented Validation) a fluent API for type-safe bean validation and mapping
- java
- fluent-api
- dsl
+2 stars
from 101 · score 1.10
66.vertti / daffy
Lightweight DataFrame validation decorators for Pandas, Polars, Modin, and PyArrow. No custom types required.
- pandas
- dataframe
- validation
- polars
- pydantic
- data-quality
- +10 more
+2 stars
from 58 · score 1.10
+2 stars
from 23 · score 1.10
68.Meteor-Community-Packages / meteor-collection2
A Meteor package that extends Mongo.Collection to provide support for specifying a schema and then validating against that schema when inserting and updating.
- hacktoberfest
- meteor
- schema
- mongodb
- meteorjs
- collection
- +3 more
+1 stars
from 1,015 · score 0.69
69.bolerio / mjson
Lean JSON Library for Java, with a compact, elegant API.
+1 stars
from 93 · score 0.69
70.rluders / httpsuite
A Go library to simplify request parsing, validation, and response handling in microservices, making code cleaner and more maintainable.
- golang
- golang-package
- requests
- response
- rest
- validation
+1 stars
from 42 · score 0.69
71.mmontone / clavier
:heavy_check_mark: General purpose validation library for Common Lisp
- utilities
- validation
- lisp
- common-lisp
+1 stars
from 27 · score 0.69
72.AMWA-TV / sdpoker
A patched version of Streampunk/sdpoker with additional source-filter testing and bug fixes, used by AMWA-TV/nmos-testing
- nmos
- sdp
- testing
- st2110
- amwa
+1 stars
from 21 · score 0.69