1.pydantic / pydantic
Data validation using Python type hints
+78 stars
from 29,188 · score 4.37
Trending repositories
Ranked by Attention Score: stars gained over the last 7 complete days
24 repositories by Attention Score · Oct 27, 2026 – Nov 2, 2026 (UTC)
2.567-labs / instructor
structured outputs for llms
+25 stars
from 14,063 · score 3.26
3.react-hook-form / react-hook-form
📋 React Hooks for form state management and validation (Web + React Native)
+16 stars
from 44,882 · score 2.83
4.unionai-oss / pandera
A light-weight, flexible, and expressive statistical data testing library
+10 stars
from 4,497 · score 2.40
5.json-schema-org / json-schema-spec
The JSON Schema specification
+7 stars
from 5,198 · score 2.08
6.go-playground / validator
:100:Go Struct and Field validation, including Cross Field, Cross Struct, Map, Slice and Array diving
+6 stars
from 20,209 · score 1.95
7.open-circle / valibot
The modular and type safe schema library for validating structural data 🤖
+6 stars
from 9,048 · score 1.95
8.validatorjs / validator.js
String validation
+4 stars
from 23,742 · score 1.61
9.apple / pkl
A configuration as code language with rich validation and tooling.
+4 stars
from 11,551 · score 1.61
10.typestack / class-validator
Decorator-based property validation for classes.
+3 stars
from 11,850 · score 1.39
11.AfterShip / email-verifier
:white_check_mark: A Go library for email verification without sending any emails.
+2 stars
from 1,648 · score 1.10
12.Oudwins / zog
Go with Zod inspired simple schema validation
+2 stars
from 1,218 · score 1.10
13.antonagestam / phantom-types
Phantom types for Python.
+2 stars
from 233 · score 1.10
14.hapijs / joi
The most powerful data validation library for JS
+1 stars
from 21,166 · score 0.69
15.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.
+1 stars
from 4,154 · score 0.69
16.remult / remult
Full-stack CRUD, simplified, with SSOT TypeScript entities
+1 stars
from 3,213 · score 0.69
17.h2non / filetype
Fast, dependency-free Go package to infer binary file types based on the magic numbers header signature
+1 stars
from 2,302 · score 0.69
18.metosin / malli
High-performance data-driven data specification library for Clojure/Script.
+1 stars
from 1,774 · score 0.69
19.fabian-hiller / modular-forms
The modular and type-safe form library for SolidJS, Qwik and Preact
+1 stars
from 1,211 · score 0.69
20.FirelyTeam / firely-net-sdk
The official Firely .NET SDK for HL7 FHIR
+1 stars
from 939 · score 0.69
21.boraseoksoon / Throttler
One Line to throttle, debounce and delay: Say Goodbye to Reactive Programming such as RxSwift and Combine.
+1 stars
from 166 · score 0.69
22.vertti / daffy
Lightweight DataFrame validation decorators for Pandas, Polars, Modin, and PyArrow. No custom types required.
+1 stars
from 59 · score 0.69
23.cinar / checker
Zero-dependency Go input validation, in-place normalization, and JSON Schema generation from struct tags.
+1 stars
from 54 · score 0.69
24.Axot017 / validate
OCaml library designed to streamline the process of validating records, variants, lists, or values. It primarily operates through a PPX deriver that automatically generates validators.
+1 stars
from 18 · score 0.69