React and Angular Developer Tools for Chrome: Install, Inspect and Profile

React Developer Tools for Chrome is a free browser extension published by Meta that adds a Components tab and a Profiler tab to Chrome DevTools. Install it from the Chrome Web Store in under two minutes, open any React app running in development mode, press F12, and inspect props, state, hooks, and render performance without touching your source code.

• Key Takeaway 1: Both React DevTools and Angular DevTools are free and install in under two minutes from the Chrome Web Store.
• Key Takeaway 2: React Developer Tools for Chrome only activates on pages running a development build of React, not a minified production bundle.
• Key Takeaway 3: The Profiler tab records which components re-rendered, why they re-rendered, and exactly how long each render took.
• Key Takeaway 4: Angular DevTools visualises Zone.js change detection cycles, making it far easier to spot performance bottlenecks in large apps.
• Key Takeaway 5: Understanding these tools is a practical, employer-valued skill, whether you are a student, a bootcamp graduate, or switching careers into front-end development.

How to Install React Developer Tools in Chrome

Go to the Chrome Web Store and search for React Developer Tools. The publisher listed is Meta (formerly Facebook). Click Add to Chrome, confirm the permissions prompt, and the extension installs in seconds. You will see a new React logo icon appear in your Chrome toolbar. If you want structured guidance on front-end tooling alongside this setup, the 3.0 University online certification courses cover React and Angular in depth with hands-on projects.

1. Open the Chrome Web Store and search React Developer Tools.
2. Select the extension published by Meta and click Add to Chrome.
3. Confirm the permissions prompt and wait for the install to complete.
4. Restart Chrome to activate the extension.
5. Run your React app locally with npm start or vite, then press F12 to open Chrome DevTools and look for the Components and Profiler tabs.

Verifying React Developer Tools for Chrome Is Working

The toolbar icon changes colour to tell you the page’s React status. A red icon means the page is running a production build (DevTools are limited). A blue icon means a development build is detected and the full feature set is active. No colour change means React was not found on that page.

According to the Chrome Web Store listing, React Developer Tools has over 4 million active users as of mid-2025, making it one of the most widely adopted front-end debugging extensions available. That adoption figure reflects how central React Developer Tools for Chrome has become to professional workflows globally, including at product companies across Bengaluru, Hyderabad, and Pune. A 2023 NASSCOM report noted that React is the most requested front-end skill in Indian engineering job postings, which makes DevTools proficiency a direct hiring advantage.

Why React DevTools Is Not Showing Up: Common Fixes

This trips up many beginners. The four most frequent causes are: you are inspecting a production build, the page is served over a file:// URL rather than a local server, you have not restarted Chrome after installing the extension, or a corporate browser policy is blocking extension permissions.

Always run your app through a local dev server (npm start, vite, or similar). If you are testing on a live site and see the red icon, you will not get component-level inspection because the bundle is minified and component names are stripped out.

Inspecting Components, Props, State and Hooks

Click the Components tab in Chrome DevTools after installing React Developer Tools for Chrome. You will see your entire React component tree on the left, laid out the same way your JSX nests components. Click any component and the right panel shows its current props, state, and any hooks it is using, including useState, useEffect, useContext, and custom hooks.

You can edit prop values and state directly in this panel and watch the UI update live. That is genuinely useful for testing edge cases without writing temporary console.log statements all over your code.

Tracing an Unnecessary Re-Render: A Real Debugging Scenario

Imagine you are building a product listing page for an e-commerce app. Your ProductCard component keeps re-rendering every time the parent’s state changes, even when the card’s own props have not changed. This is one of the most common performance complaints junior developers bring to code reviews at Indian IT services firms and product startups alike.

Open the Components tab in React Developer Tools for Chrome, select ProductCard, and check its props panel. If the parent is passing a new object reference on every render (a common mistake with inline object literals like style={{ color: 'red' }}), the component sees a new prop each time and re-renders. Wrapping the component in React.memo fixes it, but you would never have pinpointed the cause without the React component inspector.

Profiling React Component Performance with the Profiler Tab

Switch to the Profiler tab. Click the record button (the circle icon), interact with your app, then stop recording. React Developer Tools for Chrome renders a flame chart showing every component that rendered during that session, colour-coded by render time.

Grey bars mean a component did not re-render. Yellow or red bars mean it did, and the longer the bar, the more time it consumed. Click any bar to see why that component rendered: a prop change, a state change, or a parent re-render. The React team’s official documentation states that the Profiler tab is the recommended first step before applying any memoisation optimisation such as React.memo or useMemo.

React Developer Tools for Chrome and Angular DevTools: Feature Comparison

DevTools Tab	Primary Use	Key Data Shown	Min. Framework Version	Works on Production Build?
React: Components	Inspect component tree	Props, state, hooks, context	React 0.13+	Partial (no component names)
React: Profiler	Record and analyse renders	Render time, render cause, flame chart	React 16.5+	No
Angular: Components	Inspect Angular component tree	Input/output bindings, injected services	Angular 9 (Ivy)	No
Angular: Profiler	Visualise change detection	Change detection cycles, duration per component	Angular 9 (Ivy)	No

Angular DevTools Chrome Extension: Component Trees and Change Detection

Angular DevTools is the official Chrome extension maintained by the Angular team at Google. Search for it by name in the Chrome Web Store, click Add to Chrome, and restart your browser. Open an Angular app running in development mode and you will see an Angular tab appear in Chrome DevTools.

The extension requires Angular 9 or later. According to the Angular documentation, Angular DevTools supports all apps built with Ivy, which became the default compiler from Angular 9 onwards. If you are on an older project using View Engine, the extension will not work.

Reading the Angular Component Tree

The left panel shows a hierarchical tree of your Angular components, exactly mirroring the DOM structure your app produces. Click any component and the right panel displays its input bindings (equivalent to React props), output bindings (event emitters), and any injected services. You can search the tree by component name, which is a real time-saver in large enterprise apps.

Indian product teams building Angular-based banking or insurance portals often have component trees hundreds of nodes deep. Being able to search and jump directly to a component is far faster than reading through template files.

Understanding Change Detection with Angular DevTools

Angular’s change detection is powered by Zone.js, which patches browser APIs to detect asynchronous events and trigger UI updates. The Profiler tab in Angular DevTools records change detection cycles and shows you exactly which components were checked, how long each check took, and how many cycles ran during a user interaction.

A healthy Angular app running ChangeDetectionStrategy.OnPush should check far fewer components per cycle than one using the default strategy. A 2023 benchmark published by the Angular team showed that switching a mid-sized app to OnPush reduced change detection time by roughly 40-60% in components with stable inputs. Angular DevTools makes it possible to verify that improvement numerically rather than just trusting the theory.

According to the Stack Overflow Developer Survey 2024, Angular is used by approximately 17.1% of professional developers worldwide and React by 39.5%. Both frameworks remain dominant in Indian IT services and product companies, so fluency with both the React Developer Tools Chrome extension and Angular DevTools is a genuine career advantage.

Practical Next Steps After Installing Both Extensions

Start with a personal project or a sample app, not a production codebase. Run it locally in development mode, open the relevant DevTools tab, and spend 20 minutes clicking through the component tree. Once you are comfortable with basic inspection, record a Profiler session and look for any component rendering more than 10 times during a single button click. Fix it, record again, and compare the flame charts. That iterative loop is exactly how professional front-end engineers debug performance.

For more practical, code-level articles on React, Angular, and modern JavaScript tooling, visit the 3.0 University blog.

Frequently Asked Questions

What is React Developer Tools for Chrome?

React Developer Tools for Chrome is a free browser extension published by Meta. It adds a Components tab and a Profiler tab to Chrome DevTools, letting you inspect the component tree, read props, state and hooks in real time, and record render performance without modifying your source code. It works with any React version from 0.13 onwards.

How do you install React Developer Tools in Chrome?

Open the Chrome Web Store, search for React Developer Tools, select the extension published by Meta, and click Add to Chrome. After confirming the permissions prompt, restart Chrome. Open a React app running in development mode on a local server, press F12, and look for the Components and Profiler tabs inside Chrome DevTools.

What is Angular DevTools used for?

Angular DevTools is an official Chrome extension from the Angular team at Google. It lets you inspect Angular component trees, view input and output bindings, explore injected services, and profile change detection cycles powered by Zone.js. It is particularly useful for identifying which components are being checked unnecessarily and for verifying the impact of switching to ChangeDetectionStrategy.OnPush.

Why is React DevTools not showing up in Chrome?

The four most common causes: you are viewing a production build (React Developer Tools for Chrome is limited on minified bundles), the page is opened via a file:// URL instead of a local dev server, Chrome was not restarted after installing the extension, or a browser policy is blocking the extension’s permissions. Always serve your app through npm start or vite on localhost to get the full feature set.

How do you profile React component performance in Chrome?

Open the Profiler tab in Chrome DevTools after installing React Developer Tools for Chrome, click the record button, interact with your app, then stop recording. A flame chart appears showing every component that rendered, colour-coded by render duration. Click any component bar to see the exact reason it rendered: a prop change, a state change, or a parent re-render. Use this data before applying React.memo or useMemo.

Does React Developer Tools work on production builds?

Partially. The toolbar icon turns red on production builds, indicating limited functionality. Component names are stripped from minified bundles, so the component tree is not readable. The Profiler tab does not work on production builds at all. Always use a local development server to get the full React Developer Tools Chrome experience.

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Last updated: June 2025. Reviewed by the 3University editorial team.