7 Must-Use Front-End Debugging Tools

A list of useful tools to save you time and make debugging easier

Mahdhi Rezvi
May 12 · 5 min read
Photo by Zan on Unsplash

If you’ve been working on the front end, you know how hard it is to debug applications. Especially with JavaScript, a small mistake can sometimes take hours to debug. With different browsers, operating systems, and devices, bugs are inevitable.

This article outlines some tools that can help you find, diagnose, and fix your issues. Depending on your situation, some tools perform better than others.

Developer Tools in Web Browsers

You can also use the network inspector or the CSS styles inspector to make your debugging easy and smooth.

You can easily do a Google search to find out more about the developer tools for your browser.


Postman is one of the best JS tools to debug your requests and responses. It offers software for macOS, Windows, and Linux. It allows you to quickly and easily send REST, SOAP, and GraphQL requests directly.

With Postman, you can tweak requests, analyze responses, and debug problems. This will help you immensely at times when you’re not sure whether the problem lies with your front end or the back.

CSS Lint

It does basic syntax checking and applies a set of rules to the code that look for problematic patterns or signs of inefficiency.

JSON Formatter & Validator

You’ll expand each object and format it manually to fix this. This action would take a lot of your precious time. Instead, you can use the JSON Formatter & Validator tool and simply insert your minified JSON and get a correctly formatted version as output. This tool can validate your JSON to RFC standards as well.


But there’s always a chance of you missing a bug and proceeding into production. Even after deployment, you’ll be unaware of any residing bugs without anyone informing you about it. An end user will rarely report a bug via the support email provided. This is where Sentry comes into play.

Cloud-based error-logging systems like Sentry help you record instances of errors, even after deployment. Sentry provides you with an all-round solution covering most of the frameworks available.

Sentry-supported languages and frameworks


JSHint scans a program written in JavaScript and reports commonly made mistakes and potential bugs. The potential problem could be a syntax error, a bug due to an implicit type conversion, a leaking variable, or something else entirely.

Below is a sample function I used to see JSHint in action.


With a huge combination of device + operating system + browser, this tool is definitely a must use. You can get the best out of this tool by using it with an error-logging tool like Sentry. When you log an error, you can reproduce the exact scenario by referring to the environment and recreating it in BrowserStack.

They offer lower pricing for freelancers and free licenses for open-source projects.


Happy debugging!

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Advice for programmers.

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