Top 5 JavaScript Code validators

JavaScript has been on the ascent and is one of the most widely used languages in order to design interactive websites. It is used in frontend/client-side as well as backend/server-side development. JavaScript makes web pages more dynamic and  interactive.

What are validators?

In simpler words, validators are computer programs used to check the validity and accuracy of parts of a code or document.

In other words, code validation checks if the encoding of a web page complies with the standards  and recommendations established by the World Wide Web Consortium (W3C) for the network.

Top 5 JavaScript Code Validators

As discussed above, JavaScript validators are used to test code and find errors. Regardless of your level of writing code experience, you will have to use a code validator to either authenticate/validate or debug your code sooner or later. Even if you’re a JavaScript pro, there is no harm in validating your code to make sure everything is good to go.

If you are searching for new facilities to validate your code, then you have come to the right place; this article will provide a thorough analysis of the top 5 JavaScript code validators. These validations will help you seek out every little bug in your code:


On top of the list, JSHint takes the place because of its great features, user-friendliness and compatibility with any environment. The tool is written in JavaScript which helps to identify and report typical mistakes and possible bugs. JShint is an open source platform and can be easily adjusted in the environment where your code is expected to run.

You can simply use it by entering the code in the left section of the page. Once the code has been validated, you’ll see the report on the right side.

Main Features

  • Community driven tool
  • Flexible
  • Publically available


There is always a tough competition to be at the top place and Esprima is not far behind. Esprima does not check for common problems in the code but rather checks for syntactical errors. Esprima is perfect for when you forget to put a semicolon or square brackets somewhere and want to quickly find a solution.

Main Features

  • Supports syntax tree format
  • Support for JSX, a syntax extension for React
  • Heavily tested

Code Beautify

This code validator tool is basically a JS checker that detects errors and collects information about the total length of the code including the total number of words and the total lines. Code Beautify is a great tool to use to quickly and easily check your JavaScript or jQuery code.

Main Features

  • Support JSX syntax
  • Beautify/format your JavaScript
  • Helps to obfuscator(change variable name and minify) and packers
  • Beautify JS works on Chrome, Firefox, Edge, and Safari etc.


JSLint is a tool for code supervision and for error detection, another important aspect of programming.  JSLint is one of the most flexible and customizable code checker for JavaScript that allows you to choose from several options. These options define how your code is validated; By choosing a few things you want  to “allow” the checker, you can avoid making unnecessary errors about things you already know, or don’t plan to fix. Also, you can choose options for CouchDB or Node.js. In simpler words you can say that analyzing potential flaws in your code is called “linting” and  thus as the name suggests it is one of the most widely used Linting JS tools.

HTML Code Sniffer

HTML Code Sniffer is used for validating HTML source code and the JavaScript code embedded inside HTML. It looks for any violations of the defined coding standard; it is written in JavaScript so it can work without communicating with the server. The developers can create their own “sniffs” to enforce their own coding standards.


Code validators look for errors in code; most modern IDEs and code editors come fully equipped with code validators. This article lists the top 5 JavaScript code validators which will come in handy if you do not have access to a code editor that has an inbuilt code validator. It is important to consider the main features of each code validator tool and choose the one that best suits your needs.

About the author

Shehroz Azam

A Javascript Developer & Linux enthusiast with 4 years of industrial experience and proven know-how to combine creative and usability viewpoints resulting in world-class web applications. I have experience working with Vue, React & Node.js & currently working on article writing and video creation.