18 Chrome Extensions Every Developer and Tester Needs

Almost everyone working with browsers needs extensions to streamline their work. In this manner, developers especially need them for specific challenges. Let’s look at some of them:

• Debugging: Debugging is easier with extensions like React Developer Tools (which we discuss later in this article). They allow you to inspect components, view their state, and identify issues instantly. Why does this matter? Because you can troubleshoot without digging through endless console logs or adding extra code to track changes.
• API Testing: Some extensions let you test APIs right from your browser. You can send requests, review responses, and adjust your endpoints on the spot. This is especially useful when debugging API integrations or verifying backend updates quickly.
• Browser Customisation: Testing often requires tweaking browser behaviour, and browser extensions make it simple. You can modify HTTP headers or switch user agents to simulate different devices. This is handy when replicating real-world conditions for testing.
• Quick Design Tweaks: Small design adjustments can be handled with some extensions (like ColorZilla and Stylebot). You can pick colours directly from a webpage or edit CSS live to see how changes look. Why is this helpful? It saves you from jumping back and forth between your code editor and the browser.

Now it’s time to move on to the list of tools that can be life-saver or at least side helpers for devs.

This list of the best Chrome extensions for developers is meticulously curated to enhance your productivity and, most importantly, save you a great deal of time. So if you are a back-end, front-end, or one-man-army web developer, fasten your seatbelts, and let’s go!

Chrome rating: 5/5

Capture is the first Chrome extension we advise you to add to your browser for several reasons. With Capture, recording interactions on web pages becomes much easier. It automatically captures all your actions within each test step, generating a timestamped video of your test execution. This video and the transcript of actions allow you to reproduce defects quickly and gain a clear understanding of the reported issues.

It also offers versatile capturing options, including desktop capture, window recording, or in-app screencasting. Capture works even better when everyone on the team uses it. A timestamped video of discovered defects from the testers helps you understand the issue promptly, accelerating the troubleshooting process.

Capture automatically saves crucial information about the operating system, browser version, and window resolution used during the test as well. You can also take full or partial screenshots directly within the browser and annotate them on the spot.

This must-have Chrome extension for web developers also empowers teams with comprehensive test documentation by providing annotated screenshots, timestamped videos, and a log of all tester inputs. As a company, you will save yourself quite a bit of stress that independent and government QA audits often carry. 

Additionally, Capture integrates with one of the most popular bug-reporting tools — aqua cloud. With this integration, you can create a test case from scratch, start a test run, and report the captured data directly to the tool.

While not a Chrome extension, aqua cloud is an indispensable test management solution for developers and testers, designed to enhance your entire testing ecosystem. Although Capture is a free standalone tool, it integrates seamlessly with aqua cloud, transforming your bug reports into part of a cohesive testing process. So what does aqua cloud do?

aqua offers unparalleled visibility and structure for your testing efforts, seamlessly uniting automated and manual testing. It uses powerful AI capabilities to streamline workflows and optimise efficiency. 

As a test management solution, aqua cloud lets you control your test coverage and update the QA scope in seconds. With its requirements view, you can easily identify requirements not covered by tests and check if existing test cases are up-to-date with just one click. aqua’s AI Copilot saves you hours by creating missing tests and covering more edge cases quickly, making it the best tool for high-volume projects. By keeping all tests in a single solution, aqua boosts synergy, allowing you to run tests directly or integrate with tools like Selenium, JMeter, and Ranorex. 

For user acceptance testing, aqua cloud maximises the usage of AI to streamline the process. You can open a requirement and auto-create comprehensive test cases, describe tests in plain words and prioritise test cases to ensure critical tests are executed before deployment. Dashboards with KPI alerts track product maturity, and you can grant end-user testers free licenses to run scenarios and report defects, limiting their access to specific projects or folders as needed. 

As a bug tracking tool, aqua cloud integrates seamlessly with a tool called Capture. Capture enhances this by providing 100% visual bug reports with timestamped videos and environment information, streamlining defect reporting. Customisable defect templates ensure all relevant information is included, making bug tracking efficient and thorough.

For requirements management, aqua cloud goes beyond traditional methods by leveraging AI-powered tools to create comprehensive requirements, PRDs, and User Stories. With its Dependencies functionality, aqua cloud allows you to meticulously define how one item relates to another—whether verifying, duplicating, or depending on others—thereby fostering a structured and organized testing culture. Additionally, aqua cloud enables you to establish governance workflows that automatically enforce item status changes, required fields, and transition restrictions. This cohesive framework ensures all mandatory item fields are completed, maintaining a streamlined and controlled testing process. By integrating AI into requirements management, aqua cloud makes your test management more efficient and effective, ensuring thorough coverage and alignment with business objectives.

Chrome rating: 4.4/5  

CSSViewer is the second Chrome extension for developers on our list, and it allows you to inspect and extract CSS properties from any element on a web page. With CSSViewer, you can easily identify and analyse the CSS styles applied to specific elements by hovering over them. It displays the computed CSS properties, including colour, font, padding, margin, and more, providing you with a quick overview of the styling rules applied to a selected element. 

CSSViewer streamlines inspecting and understanding CSS styles, making it convenient for you to troubleshoot styling issues, debug layout problems, and ensure consistency in web designs.

Bug Magnet is a handy Chrome extension for testers to quickly discover and report bugs. It provides a context menu for input fields with various pre-defined values and patterns, helping testers perform exploratory testing more efficiently. 

Pre-defined input values allow testers to quickly fill input fields with common test cases, including edge cases like long strings, special characters, HTML tags, and SQL injection patterns. Testers can also add their own custom values to the context menu for more personalised testing scenarios. The extension is integrated into the right-click context menu for ease of use and offers configurable categories to suit different testing needs.

Bug Magnet saves time by providing quick access to a wide range of test inputs, allowing testers to focus on finding and reporting bugs rather than manually creating test data. The extension helps testers cover a broad range of test scenarios, including edge cases that are often overlooked, thereby increasing the likelihood of identifying potential issues. The integration with the context menu makes it easy to use without interrupting the testing flow, providing a seamless and intuitive experience. The ability to add custom values and configure categories ensures that Bug Magnet can be tailored to meet the specific needs of any testing project.

Chrome rating: 4.8/5 

Octotree is another top Chrome extension for developers that provides a tree-style code navigation sidebar for GitHub repositories. It helps developers simplify code exploration on GitHub by organising the repository’s files and folders in a collapsible tree structure. 

Octotree enhances your code browsing experience on GitHub repositories by providing easy navigation through codebases, seamless switching between files and directories, and quick access to code snippets by eliminating repetitive page navigation. It significantly improves productivity, particularly for larger projects with extensive directory structures, enabling efficient exploration of complex codebases.

Moving on through our list, we bring you another Chrome extension for testers. Checkbot is a robust Chrome extension designed to streamline website testing and auditing processes. It automates checks for SEO, speed, security, and accessibility issues, delivering comprehensive reports and actionable insights directly within the browser. 

Checkbot offers features such as SEO analysis for on-page factors like meta tags and keywords, speed tests to identify slow-loading pages, security scans for vulnerabilities, and accessibility audits to ensure compliance with WCAG guidelines. This extension enhances testing efficiency by automating critical checks and providing detailed reports, enabling testers and developers to optimize website performance, security, and user accessibility effectively.

Now that you’ve seen the list of extensions, here comes the real challenge: which ones should you actually install? With browser performance on the line, you can’t just add them all. Use our interactive tool below to build your ideal extension stack based on your role and discover which combinations work best (and which might slow you down).

Chrome rating: 4.1/5  

The next useful Chrome extension for developers is React Developer Tools, which enhances Chrome Developer Tools by providing additional features specifically tailored for React applications. 

This extension will help you with the following:

• Inspect the React component hierarchy 
• Monitor component props and state 
• Debug React applications more effectively

The extension allows you to analyse each React component’s structure and behaviour, examine the props and state values, and observe the changes through the component tree. React Developer Tools also provides invaluable insights for debugging, optimising performance, and understanding the React architecture of your applications.

The WAVE Evaluation Tool is a Chrome extension designed to assist testers and developers in evaluating the accessibility of web content. It provides visual feedback and detailed reports on accessibility issues based on WCAG guidelines directly within the browser. 

The WAVE Evaluation Tool identifies accessibility barriers on web pages, highlights elements with accessibility errors directly on the page, and generates comprehensive reports outlining detected accessibility violations and offering suggestions for remediation. Users can customize settings for different accessibility standards and preferences to suit their testing needs. 

This extension enhances testing accuracy by providing real-time feedback and detailed reports, empowering testers and developers to identify and resolve accessibility issues efficiently and ensure web content is inclusive and compliant with regulatory standards.

Although the abovementioned extensions are great for testers and devs, nothing streamlines the testing process quite like aqua cloud. With advanced features for comprehensive test management, aqua ensures efficient test case creation, and thorough requirement coverage, and leverages AI with its Copilot to automate test generation and optimise workflows.

Chrome rating: 4.4/5  

Developed by Google, Lighthouse is a powerful extension that helps you audit web pages for:

• Performance 
• Accessibility 
• Best practices
• SEO

Lighthouse allows you to run an automated analysis of a web page and receive a detailed report with suggestions for improvement. It monitors different aspects of a web page, like performance metrics, accessibility standards, and adherence to best practices. 

This extension provides actionable insights and recommendations to optimise your website’s performance, enhance accessibility, and improve its overall quality and visibility. As your website grows, keeping track of the complicated metrics over time becomes much harder, so Lighthouse might be your best choice. Whether you run ads or count on organic traffic, getting recommendations for better Google ranking straight from Google is invaluable.

Chrome rating: 4.6/5

JSON Viewer is a helpful extension that allows you to view and format JSON documents more comfortably. With this extension, you can present JSON responses from APIs or raw JSON data files in a structured and organised format, making it easier to understand and analyse. 

JSON Viewer also provides the following:

• Syntax highlighting 
• Collapsible sections
• Indentation

These features allow you to easily navigate and explore complex JSON structures, enhancing readability and facilitating debugging and data analysis tasks.

Chrome rating: 4.7/5

One of the most popular and best Google Chrome extensions for developers is Postman, a popular API development and testing tool that simplifies sending HTTP requests and analysing responses. With this extension, you can easily create and send requests like GET, POST, PUT, and DELETE to test APIs. 

It provides a user-friendly interface for adding:

• Request headers
• Query parameters
• Request bodies 
• Authentication credentials 

With Postman, you can save and organise your API requests in collections, making management smoother. Its comprehensive testing capabilities help you validate API responses, debug issues, and streamline your web application development and testing.

Chrome rating: 4.7/5

This extension brings you the power of Visual Studio Code, a popular and feature-rich code editor. It provides a familiar and robust development environment within your browser. It provides features like:

• Syntax highlighting
• Code completion from auto-suggestions
• Debugging capabilities
• Access to many extensions

The VS Code extension enables you to write, debug, and test code efficiently. It also supports multiple programming languages and offers various customisation options, making it a valuable tool for web developers working directly in the browser.

Chrome rating: 4.5/5 

The Web Developer is a comprehensive toolkit for web developers, offering various essential tools to enhance your web development workflow. It has several unique features, including:

• The ruler that allows you to measure elements on a web page 
• Colour picker that enables you to select colours and get their hexadecimal or RGB values  
• CSS viewer to provide a detailed inspection of CSS properties applied to web page elements

This extension also offers functionalities like temporarily disabling JavaScript, CSS, or images to test website performance, analysing and editing cookies, and manipulating forms for testing purposes. With the Web Developer extension, you can streamline your web development tasks and quickly access essential tools directly within the Chrome browser.

Chrome rating: 4.7/5

Redux DevTools is a powerful extension for developers, providing advanced debugging and inspection capabilities. It allows you to:

• Monitor and debug Redux state changes in your application, making the bug-tracking process easier
• Examine the Redux store’s current state
• Analyse how the state evolves over time

The extension offers unique features like time-travel debugging. It lets you replay past actions and observe their effect on the application’s state. With Redux DevTools, you can gain valuable insights into your Redux-powered application, identify potential issues, and optimise the state management process.

Chrome rating: 4.6/5

Wappalyzer is a Chrome extension that helps you identify the technologies used on websites. It gives you insights into the underlying technology stack behind a website, like content management systems, programming languages, frameworks, and analytics tools. 

With Wappalyzer, you can get a detailed breakdown of the technologies used, allowing you to understand any website’s technological landscape. This information can be valuable for competitive analysis, research, and web development ecosystem understanding.

Chrome rating: 4.4/5

Probably the most popular Chrome extension on our list is EditThisCookie, with more than 11,000 reviews on the webstore. It allows you to edit, delete, and view the cookies in your browser. The extension also provides a user-friendly interface, inspecting each cookie’s values, expiration dates, and other properties. 

You can easily add new cookies, modify existing ones, or remove no longer-needed cookies. As obvious from its name, EditThisCookie is particularly valuable in troubleshooting cookies-related issues. It lets you manipulate cookie data and observe the effects in real-time. EditThisCookie simplifies the cookie management process and provides greater control over the cookies stored by websites you visit.

Chrome rating: 4.4/5

ColorZilla is the next popular extension on our list that provides an eyedropper tool and a colour picker for selecting colours from web pages. With ColorZilla, you can easily extract colour values from elements on a web page, including text, backgrounds, buttons, and images. 

The eyedropper tool allows you to click on elements to capture their colour, while the colour picker provides a comprehensive interface for choosing colours manually. The extension also offers a palette generator, gradient generator, and other colour-related utilities to simplify the colour selection and manipulation tasks. Whether you’re a designer, developer, or digital artist, ColorZilla is a valuable web design and development tool.

Chrome rating: 3.9/5

The last extension on our list of the best Chrome extensions for developers is User-Agent Switcher, which allows you to switch the user-agent string sent by your browser. It is useful for testing and emulating different devices and browsers, enabling you to change your browser’s user agent to simulate the behaviour of various platforms like different browsers, operating systems, or mobile devices. 

Modifying the user-agent string allows you to test how a website or web application behaves under different conditions and ensure optimal compatibility across multiple platforms. Whether you need to test responsive design, browser-specific functionality, or mobile responsiveness, the User-Agent Switcher extension provides a convenient and efficient solution.

14 Chrome extensions from our list will greatly enhance your productivity and efficiency. From code editing and debugging to testing and project management, each extension serves a specific purpose and offers unique benefits. Incorporating these extensions into your workflow allows you to streamline tasks, improve code quality, and optimise your overall development process.