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Best Free Chrome Extensions for Developers – Top Picks

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Best Free Chrome Extensions for Developers (2026 Guide)

Best Free Chrome Extensions for Developers in 2026

Best free Chrome extensions for developers are no longer optional tools — they are essential parts of a modern development workflow. Whether you are building responsive websites, debugging JavaScript issues, testing APIs, or optimizing performance, Chrome extensions can save hours of manual effort.

In 2026, developers rely heavily on lightweight browser tools instead of bulky desktop software. Many critical tasks such as performance audits, state inspection, API debugging, and SEO analysis can be handled directly inside Google Chrome. Frontend developers working with React and CSS, backend engineers testing authentication flows, and full-stack developers managing complex applications all benefit from the right Chrome extensions.

This guide is a fully updated, SEO-ready list of the best free Chrome extensions for developers. Every tool listed here is trusted, actively maintained, and free to use. The focus is on productivity, performance, and real-world development needs.

Best Free Chrome Extensions for Developers

React Developer Tools for Chrome

React Developer Tools is one of the most important Chrome extensions for frontend developers. It allows you to inspect React component trees, props, state, and hooks directly in the browser.

This extension is essential for developers working with React, Next.js, and other modern JavaScript frameworks.

Official website: https://react.dev

Redux DevTools Extension

Redux DevTools helps developers debug application state changes using time-travel debugging. You can inspect dispatched actions, review state history, and replay events to identify logic issues.

This is one of the best free Chrome extensions for developers building state-heavy applications.

Official website: https://redux.js.org

Web Developer Extension

The Web Developer extension adds a powerful toolbar to Chrome with tools for inspecting HTML, CSS, images, forms, and JavaScript behavior.

It is widely used for quick debugging and layout testing during web development.

Official website: https://chrispederick.com

Lighthouse Chrome Extension

Lighthouse is Google’s official auditing tool for performance, accessibility, best practices, and SEO. It generates detailed reports that help developers improve Core Web Vitals.

This Chrome extension is essential for performance optimization and search visibility.

Official documentation: https://developer.chrome.com

Wappalyzer Technology Profiler

Wappalyzer instantly identifies the technology stack used by any website. It detects frameworks, CMS platforms, analytics tools, and libraries.

This extension is useful for competitive research and learning how modern websites are built.

Official website: https://www.wappalyzer.com

JSON Formatter for Chrome

JSON Formatter automatically formats raw JSON responses into a clean, readable structure.

Backend developers and API testers rely on this tool when working with REST APIs and JSON data.

Postman Interceptor Extension

Postman Interceptor connects browser traffic directly to Postman, allowing developers to capture cookies, headers, and API requests.

This extension is extremely helpful for API debugging and authentication testing.

Official website: https://www.postman.com

EditThisCookie

EditThisCookie allows developers to create, edit, delete, export, and import browser cookies easily.

It is commonly used for session testing and login debugging.

Official website: https://www.editthiscookie.com

Responsive Viewer Extension

Responsive Viewer lets you view websites on multiple screen sizes at the same time.

This extension helps frontend developers test responsive layouts efficiently.

Official website: https://responsiveviewer.org

daily.dev Developer News Feed

daily.dev turns your new tab into a personalized feed of developer news, tutorials, and updates.

It helps developers stay informed about trends in web development and programming.

Official website: https://daily.dev

Internal Resources from TechOnDev

FAQ – Best Free Chrome Extensions for Developers

Are Chrome extensions safe for developers?

Most official Chrome extensions are safe. Developers should always review permissions and install extensions from trusted publishers.

Do Chrome extensions slow down the browser?

Too many active extensions can affect performance. Keep only essential developer tools enabled.

Which Chrome extension is best for performance testing?

Lighthouse is the best free Chrome extension for performance testing and Core Web Vitals analysis.

Are these Chrome extensions free?

Yes, all Chrome extensions listed in this guide are free to install and use.

Final Thoughts

Using the best free Chrome extensions for developers can significantly improve productivity, code quality, and debugging speed. This 2026 update focuses on tools that are reliable, actively maintained, and trusted by developers worldwide.

Bookmark this page and visit TechOnDev.com regularly for more developer tools, guides, and updates.

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