#validation

Missing Laravel Validation Rules

A zero-allocation validation library for .NET. Roslyn source generator wires all rule evaluation at compile time — no reflection, no boxing, no runtime overhead.

Zero-dependency TypeScript password validation — 7 validators, entropy & crack-time estimates, HIBP breach checks, React hook + WCAG AAA component. Core ~6.3KB gzipped.

UK Bank Modulus Check Library

A collection of utilities for Node.js and browser environments.

Validate and retry LLM outputs for ruby_llm. Describe the JSON response you expect, fall back to a stronger model when the cheaper one fails the rules, and gate CI on regressions — all as one contract object per step.

Shared validation envelope models and contracts for Validibot.

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Koval UI is a collection of React components built for modern web browsers. Let the browser do the heavy lifting – by using its APIs. Supports column-based layout, built-in and external form validation, theming, floating components and many more.

A Python library that provides tools for using and validating Telegram mini app init data.

✅ Automatic HTML validation middleware for Express applications.

Lightweight & performant form & request data validation library.

A high-performance Rust port of Google's libphonenumber for parsing, formatting, and validating international phone numbers

Checks that all dependencies in your package.json have supported versions installed and complies with your specified node engine version range

Source generated validations for Immediate.Handlers parameters

An Awesome [/osom/] Object Data Modeling (Database Agnostic).

Catch deploy-time CloudFormation failures at synth time: a Rego rule pack for constraints that resource schemas miss, injected into the AWS CDK built-in validator

Semantic versioning utilities with the addition of version constraints parsing and checking.

Check, lint, and convert design tokens to CSS. DTCG JSON, HRDT YAML, and DESIGN.md support.

TypeScript JSON rules engine: one AST compiles to in-memory checks, Prisma query plans, and SQL WHERE clauses.

Modern TypeScript libraries for building scalable web applications.

A comprehensive .NET library for replacing primitive obsession with strongly-typed, self-validating domain models across four pillars: semantic strings with 50+ validation attributes, polymorphic path handling, metadata-generated semantic quantities, and musical value types.

React Autocomplete component for Lob Address Autocomplete

Type-safe, strict Python. Works well with standard Python

A collection of helpers libraries for Minimal API projects.

Lightweight, extensible data validation library for Python

Python Data Validation for Humans™.

A library and CLI for validating and managing package release contents in lean distribution archives.

Zero config, accurate JSON schema generator for helm charts via static analysis

The most comprehensive guard clause & validation ecosystem for .NET