1.colinhacks / zod
TypeScript-first schema validation with static type inference
- typescript
- schema-validation
- type-inference
- runtime-validation
- static-types
+984 stars
from 43,278 · score 6.89
Trending repositories
Ranked by Attention Score: stars gained over the last 90 complete days
73 repositories by Attention Score · Aug 7, 2026 – Nov 4, 2026 (UTC)
2.pydantic / pydantic
Data validation using Python type hints
- validation
- parsing
- json-schema
- pydantic
- python
- hints
- +5 more
+909 stars
from 28,391 · score 6.81
3.google / libphonenumber
Google's common Java, C++ and JavaScript library for parsing, formatting, and validating international phone numbers.
+192 stars
from 18,150 · score 5.26
4.open-circle / valibot
The modular and type safe schema library for validating structural data 🤖
- bundle-size
- modular
- parsing
- schema
- type-safe
- typescript
- +8 more
+190 stars
from 8,862 · score 5.25
5.go-playground / validator
:100:Go Struct and Field validation, including Cross Field, Cross Struct, Map, Slice and Array diving
- validation
- translation
- error-handling
+174 stars
from 20,041 · score 5.16
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
+99 stars
from 14,771 · score 4.61
7.unionai-oss / pandera
A light-weight, flexible, and expressive statistical data testing library
+99 stars
from 4,411 · score 4.61
8.AfterShip / email-verifier
:white_check_mark: A Go library for email verification without sending any emails.
+60 stars
from 1,592 · score 4.11
9.typestack / class-validator
Decorator-based property validation for classes.
- validation
- validator
- decorators
- typescript
+55 stars
from 11,798 · score 4.03
10.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]
+55 stars
from 1,914 · score 4.03
11.FluentValidation / FluentValidation
A popular .NET validation library for building strongly-typed validation rules.
+49 stars
from 9,720 · score 3.91
12.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
+48 stars
from 4,107 · score 3.89
13.validatorjs / validator.js
String validation
- validation
- sanitization
- javascript
- node
- input
- validator
- +4 more
+38 stars
from 23,704 · score 3.66
14.python-jsonschema / jsonschema
An implementation of the JSON Schema specification for Python
- json-schema
- json
- validation
- schema
- jsonschema
+33 stars
from 4,960 · score 3.53
15.giggsey / libphonenumber-for-php
PHP version of Google's phone number handling library
- phone-number
- php
- libphonenumber
- hacktoberfest
+32 stars
from 5,042 · score 3.50
+31 stars
from 23,625 · score 3.47
17.metosin / malli
High-performance data-driven data specification library for Clojure/Script.
- clojure
- clojurescript
- validation
- modelling
- transformation
- json-schema
- +6 more
+27 stars
from 1,748 · score 3.33
18.Propaganistas / Laravel-Phone
Phone number functionality for Laravel
- laravel
- libphonenumber
- validation
- phone
+26 stars
from 3,014 · score 3.30
+24 stars
from 295 · score 3.22
20.FGRibreau / mailchecker
:mailbox: Cross-language temporary (disposable/throwaway) email detection library. Covers 55 734+ fake email providers.
- email-validation
- email-verification
+21 stars
from 1,897 · score 3.09
21.marshmallow-code / marshmallow
A lightweight library for converting complex objects to and from simple Python datatypes.
- serialization
- deserialization
- validation
- python
- marshalling
- serde
- +1 more
+20 stars
from 7,224 · score 3.04
+19 stars
from 11,617 · score 3.00
23.daviddrysdale / python-phonenumbers
Python port of Google's libphonenumber
+19 stars
from 3,758 · score 3.00
+17 stars
from 21,147 · score 2.89
25.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
+17 stars
from 5,378 · score 2.89
26.Oudwins / zog
Go with Zod inspired simple schema validation
- error-handling
- golang
- runtime-validation
- schema-validation
- templ
- translation
- +1 more
+17 stars
from 1,203 · score 2.89
27.CuyZ / Valinor
Dependency free PHP library that helps to map any input into a strongly-typed structure.
+14 stars
from 1,519 · score 2.71
28.sindresorhus / is
Type check values
- type-detection
- type-check
- is
- assertions
- typescript
- node-module
- +1 more
+13 stars
from 1,786 · score 2.64
29.Respect / Validation
The most awesome validation engine ever created for PHP
- php
- validation
- validation-engine
- fluent-interface
- validator
- standalone
- +1 more
+10 stars
from 6,025 · score 2.40
+10 stars
from 325 · score 2.40
31.ealush / vest
Vest ✅ Declarative validations framework
- validation-library
- unit-testing
- form-validation
- react-validation-library
- validation
- vue-validation
- +7 more
+9 stars
from 2,660 · score 2.30
32.RicoSuter / NJsonSchema
JSON Schema reader, generator and validator for .NET
+9 stars
from 1,578 · score 2.30
33.asaskevich / govalidator
[Go] Package of validators and sanitizers for strings, numerics, slices and structs
- govalidator
- go
- validation
- validation-library
- sanitization
+6 stars
from 6,195 · score 1.95
34.ianstormtaylor / superstruct
A simple and composable way to validate data in JavaScript (and TypeScript).
- validation
- types
- interface
- structs
- schema
- javascript
- +1 more
+5 stars
from 7,122 · score 1.79
+5 stars
from 4,136 · score 1.79
+5 stars
from 3,617 · score 1.79
+5 stars
from 3,276 · score 1.79
38.plumatic / schema
Clojure(Script) library for declarative data description and validation
+5 stars
from 2,460 · score 1.79
39.materwelonDhruv / envapt
Typed, validated config from process.env, .env files, or any object, on Node, Bun, Deno, Cloudflare Workers, and the browser. No runtime dependencies.
- config
- decorators
- dotenv
- env
- settings
- typescript
- +12 more
+5 stars
from 20 · score 1.79
40.alecthomas / voluptuous
CONTRIBUTIONS ONLY: Voluptuous, despite the name, is a Python data validation library.
+4 stars
from 1,848 · score 1.61
41.patrick-kidger / torchtyping
Type annotations and dynamic checking for a tensor's shape, dtype, names, etc.
- tensors
- named-tensors
- shape
- pytorch
- typing
- python-typing
+4 stars
from 1,481 · score 1.61
42.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.
+4 stars
from 1,406 · score 1.61
43.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
+4 stars
from 133 · score 1.61
44.bids-standard / bids-validator
Validator for the Brain Imaging Data Structure
- bids
- data-standards
- neuroimaging-data
- validation
+4 stars
from 48 · score 1.61
+3 stars
from 1,643 · score 1.39
46.vlucas / valitron
Valitron is a simple, elegant, stand-alone validation library with NO dependencies
- validation
- php
- validator
- hacktoberfest
+3 stars
from 1,595 · score 1.39
47.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
+3 stars
from 1,341 · score 1.39
48.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
+3 stars
from 1,162 · score 1.39
49.daddyz / phonelib
Ruby gem for phone validation and formatting using google libphonenumber library data
- ruby
- google-libphonenumber
- phone-validation
- phone-parse
- phone-number
- parsing
+3 stars
from 1,161 · score 1.39
50.wagslane / go-password-validator
Validate the Strength of a Password in Go
- entropy
- strength
- character
- golang-package
- security
- golang
- +2 more
+3 stars
from 589 · score 1.39
+3 stars
from 280 · score 1.39
52.didww / credit_card_validations
:credit_card: ruby gem for validating credit cards, generating credit card numbers, Luhn checks
- credit-card
- validation
- e-commerce
- rails
+3 stars
from 266 · score 1.39
+3 stars
from 83 · score 1.39
54.beberlei / assert
Thin assertion library for use in libraries and business-model
+2 stars
from 2,424 · score 1.10
+2 stars
from 1,136 · score 1.10
56.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
+2 stars
from 118 · score 1.10
58.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
+2 stars
from 96 · score 1.10
59.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 32 · score 1.10
+2 stars
from 23 · score 1.10
+1 stars
from 9,054 · score 0.69
63.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
64.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
+1 stars
from 803 · score 0.69
65.zaggino / z-schema
JSON Schema validator written in JavaScript for NodeJS and Browsers
+1 stars
from 348 · score 0.69
66.valit-stack / Valit
Valit is dead simple validation for .NET Core. No more if-statements all around your code. Write nice and clean fluent validators instead!
- validation
- fluent-api
- dotnet
- core
+1 stars
from 319 · score 0.69
67.fulcrologic / guardrails
Efficient, hassle-free function call validation with a concise inline syntax for clojure.spec and Malli
+1 stars
from 258 · score 0.69
68.Clever / csvlint
library and command line tool that validates a CSV file
+1 stars
from 208 · score 0.69
69.bolerio / mjson
Lean JSON Library for Java, with a compact, elegant API.
+1 stars
from 93 · score 0.69
70.Betree / burnex
📨🔥 Elixir burner email (temporary address) detector
- elixir
- temporary-email
- burner-email
+1 stars
from 80 · score 0.69
71.railsmechanic / bankster
An IBAN account numbers and BIC validation tool for Elixir.
- iban
- banking
- elixir
- validate-bics
+1 stars
from 34 · 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
73.uk-fci / nhs-number
Python package to provide utilities for NHS Numbers, including validity checks, normalisation, and generation.
- nhs
- fci
- python
- nhsnumber
+1 stars
from 13 · score 0.69