Custom HTML5 Form Validator In Vanilla JavaScript – Just-validate
Use JustValidate for JavaScript form validation with built-in rules, custom validators, async checks, file rules, localization, and custom errors.
JavaScript & CSS form validation
Lightweight Flexible Form Validation Engine – simpower-validation
A lightweight, flexible, simple-to-use, developer-friendly form validation library written in PURE JavaScript.
Lightweight and Powerful Data Validation Library – Iodine.js
A lightweight JavaScript validation library that makes robust form and data validation easy with chainable rules.
Vanilla JavaScript Form Validator For Bootstrap 5/4/3 Framework
A vanilla JavaScript plugin that adds extensible form validation functionalities to your Bootstrap project without third-party JS libraries like jQuery.
Feature-rich Form Validation Library – OctaValidate
An open-source, feature-rich form validation JavaScript library that makes it easy to validate form input against built-in rules, regular expressions, and input attributes.
Extendable Auto Form Validation Plugin With Validator.js
Create your own rapidly extensible and simple auto form validator that allows you to easily validate form fields in a variety of scenarios.
Versatile Data Validation JavaScript Library
A versatile data validation library that provides a set of validation helps for validating field values in an easy way.
Fast User-friendly Form Validation Plugin – Validator.js
A fast, cross-browser, user-friendly, highly customizable form validator that works with the native HTML5 input types: text, email, url, date, etc.
Regex Based Form Validator For Bootstrap 5
A script that demonstrates how to validate form fields in your Bootstrap 5 project by using custom Regex.
Bootstrap Form Validation Library Without jQuery – Native Validator
A vanilla JavaScript-powered form validation library for the latest bootstrap framework, without jQuery dependency.