Must Have Chrome Extensions for Web Developers in 2025
Google Chrome is one of the most widely used browsers worldwide, and for good reason. It offers a powerful set of DevTools for web authoring, debugging, and performance optimization. As a web developer, spending time in Chrome is almost unavoidable, and using the right extensions can significantly speed up your workflow, improve productivity, and enhance your web development experience. In this guide, we’ve compiled a curated list of essential Chrome extensions for web developers, designers, full-stack engineers, and anyone working on the web.
Essential Chrome Extensions for Every Web Developer
- Web Developer: Adds a floating toolbar with dozens of tools to inspect, debug, and manipulate any webpage. Whether it’s disabling CSS, viewing image dimensions, or quickly testing layouts, this extension is a must-have for all developers.
- Wappalyzer: Instantly reveals the technologies powering any website, including CMS platforms, ecommerce tools, analytics systems, JavaScript frameworks, and server environments. Perfect for competitive analysis or learning from other sites.
- WhatFont: Easily identify fonts, font sizes, and styles used on any webpage without digging through CSS. A lifesaver for designers and front-end developers.
- Mobile/Responsive Web Design Tester: Test your web pages across multiple mobile, tablet, and phablet devices by emulating user agents and screen resolutions. You can switch between portrait and landscape mode and see how your design responds in real-world scenarios.
- ColorZilla: Grab color codes from any webpage, analyze gradients, or generate palettes. Ideal for designers who need precise color matching directly from live sites.
- Marmoset: Quickly create snapshots of your code for demos, portfolios, or presentations. Add themes and effects to showcase your projects professionally.
- Edit This Cookie: A full-featured cookie manager that lets you view, edit, delete, or export cookies with ease. Useful for debugging session-based behavior or testing cookie-related functionality.
- Web Developer Checklist: Evaluate web pages against best practices for SEO, accessibility, performance, and usability. Instantly identify missing meta titles, H1 tags, or broken markup, with detailed guidance for fixes.
- Chrome Sniffer Plus: Detect JavaScript libraries, frameworks, APIs, and servers used on any site. Perfect for competitive analysis or reverse engineering web apps.
- DevTools Autosave: Automatically saves changes made to CSS and JS in Chrome DevTools directly to your source files, saving hours of manual work and reducing mistakes.
- Instant Wireframe: Overlay a wireframe on any webpage with a single click to analyze layout structure and usability. Great for rapid design reviews and wireframing inspiration.
- Lighthouse: Audit your web pages for performance, accessibility, SEO, and best practices. Get actionable reports to optimize your site for speed, reliability, and user experience.
- PageSpeed Insights: Quickly analyze your website’s loading performance and receive suggestions to enhance speed on mobile and desktop devices.
For HTML & CSS Developers
- HTML INSTANT: Real-time HTML/CSS/JS editor with split-screen preview. Supports image uploads and instant rendering of your code changes.
- CSSViewer: Quickly inspect CSS properties of any element, including fonts, colors, box models, and positioning, in a floating panel.
- CSS Shack: Create layered styles like in image editing software and export them to CSS files.
- Stylebot: Apply custom CSS to any site for testing or customization without touching the source code.
- Code Cola: Inspect and edit CSS in real-time with immediate visual feedback.
- CSS Grid Generator: Generate responsive grid layouts visually and export ready-to-use CSS code.
For JavaScript Developers
- JSONView: View JSON files formatted and highlighted directly in your browser with collapsible arrays and objects.
- Toggle JavaScript: Quickly enable or disable JavaScript globally or per site.
- Vue.js devtools: Debug Vue.js applications, inspect components, and monitor events.
- React Developer Tools: Inspect React component hierarchies, props, and state directly in Chrome DevTools.
- Google Analytics Debugger: Debug GA tracking code and view warnings/errors in the console.
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