Framework-agnostic form validation engine - schema-first validation core for TypeScript applications. Supports Zod, Yup, Valibot and custom validators.

Declarative validation engine for Silver Formily with rules, formats, locales, and async execution

Rune — Validation engine for the Ream framework

n8n workflow validator using official n8n validation engine - identical to n8n editor behavior

Validation engine for NHS prototype kit apps. Declarative rules, custom validators, NHS-shaped error output.

A zero-dependency, detailed validation engine for Emails, Passwords, and URLs.

Local prompt validation engine for LangPatrol

Validation engine plugin for ObjectQL - Field-level, cross-field, state machine, business rule, and uniqueness validation

Gigli: High-performance, type-safe isomorphic JavaScript and TypeScript validation engine for MERN stack, Node.js, and web browsers with built-in security, schema inference, decorator models, string rules, and OpenAPI/JSON Schema generation.

A powerful and flexible validation engine for forms with support for complex rules, dependencies, and custom validations.

Modular validation engine for AI-KOD workflows

A validation engine using @the-standard/exceptions

Live Object Validation Engine

Themis Validation Engine Core

Rule-based, extensible and async-friendly data validation engine for complex forms and business rules.

Schema-based run time validation engine, made to integrate back and front-end validations using Mongoose like schemas.

Wrap zod validation errors in user-friendly readable messages

Engine for Shiki using Oniguruma RegExp engine in WebAssembly

Locale file validation engine — missing, duplicate, placeholder and unused key validators

Convention extraction and validation engine