35 best Ruby Form Validation libraries in 2024

Forms made easy for Rails! It's tied to a simple DSL, with no opinion on markup.

A Rails form builder plugin with semantically rich and accessible markup.

Dynamic nested forms using jQuery made easy; works with formtastic, simple_form or default forms

Client Side Validations made easy for Ruby on Rails

xlsx generation with charts, images, automated column width, customizable styles and full schema validation. Axlsx excels at helping you generate beautiful Office Open XML Spreadsheet documents without having to understand the entire ECMA specification. Check out the README for some examples of how easy it is. Best of all, you can validate your xlsx file before serialization so you know for sure that anything generated is going to load on your client's machine.

Form objects decoupled from models.

Rails plugin to conveniently handle multiple models in a single form.

IdentityCache is a blob level caching solution to plug into Active Record. Don't #find, #fetch!

Official repository of the bootstrap_form gem, a Rails form builder that makes it super easy to create beautiful-looking forms using Bootstrap 5.

Date and time validation plugin for ActiveModel and Rails. Supports multiple ORMs and allows custom date/time formats.

Compose your business logic into commands that sanitize and validate input.

Ruby JSON Schema Validator

integrate pods in form of prebuilt frameworks conveniently, reducing compile time

Validation library with type-safe schemas and rules

🚀 Configurable framework agnostic plain Ruby 📨 email validator/verifier. Verify email via Regex, DNS, SMTP and even more. Be sure that email address valid and exists.

Send e-mail straight from forms in Rails with I18n, validations, attachments and request information.

Ruby gem for phone validation and formatting using google libphonenumber library data

Parameter Validation & Type Coercion for Rails

:white_check_mark: Validate links in awesome projects

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 }

Making iOS Forms insanely great with RubyMotion

A curated list of awesome Phalcon libraries and resources

An email validator for Rails.

Presenting names of people in full, familiar, abbreviated, and initialized forms (but without titulation etc)

Simplify form filling with Capybara

Multi-fetch Fragments makes rendering and caching a collection of template partials easier and faster.

Parse, validate, and format phone numbers in Ruby using Google's libphonenumber database

Parameter Validation & Type Coercion for Sinatra

Ruby gem that fetches images and metadata from a given URL. Much like popular social website with link preview.

This Gem adds useful methods to your Rails app to validate, display and save phone numbers. It uses the super awesome Phony gem (https://github.com/floere/phony).

A Git hook to validate your commit messages based on community standards.

ActiveModel validation for email. Including MX lookup and disposable email blacklist

URL Validation for Rails

Ruby library for phone number parsing, validation and formatting

Validate e-mail addreses against RFC 2822 and RFC 3696 with this Ruby on Rails plugin and gem.