String validation

Elegant iOS form builder in Swift

✅ Painless Vue forms

Do it like => validates :photos, attached: true, content_type: ['image/png', 'image/jpg', 'image/jpeg'], size: { less_than: 500.kilobytes }, limit: { min: 1, max: 3 }, aspect_ratio: :landscape, dimension: { width: { in: 800..1600 }

[INACTIVE] Client Side Validation for AngularJS 1. (You should use version > 2 💥)

Valiktor is a type-safe, powerful and extensible fluent DSL to validate objects in Kotlin

Ember computed property based validations

Higher Order Component for Validating Forms in React

A simple JavaScript validation library that doesn't interfere

A gem/plugin for Rails 3, Rails 4, Rails 5, and Rails 6 that enables client-side validation using ActiveModel + HTML5 Form Validation

Svelte Form Builder include various Input fields validated using ZOD + Superforms

Validation mixin for Ruby objects

Functional validations inspired by Ruby's ActiveModel

Python implementation of Domain Notification Pattern

@typeofweb/schema: Lightweight validator with 100% TypeScript support and sane coercion rules.

Validation frontend for models.

[MAINTAINERS WANTED] Built-in limit validations for your ActiveRecord model

Custom validation error messages for sails model with i18n support

Declarative data validations.

Don't let your user be a victim of their own action