Resources / Chrome Extensions
WhatFont and Wappalyzer let you instantly inspect any page's tech stack, ColorZilla extracts color values at a glance, and React Developer Tools together with Lighthouse are essentials for any frontend workflow.
Quick Guide
Use CodeHelper's tools when you need:
- •Privacy & offline processing
- •No account or signup required
- •Fast, client-side operations
Use external tools when you need:
- •Team collaboration features
- •Cloud storage & synchronization
- •Extensive template libraries
All Tools
WhatFont
Shows the font family, size, color and line height of any text on a page by hovering over it, no DevTools digging required.
3,000,000+ users, 4.0 stars (2.1K ratings). Last updated March 2024.
WhatRuns
Lists the frameworks, analytics tools, CMS plugins and fonts a site runs on, one click from the toolbar icon.
400,000+ users, 4.2 stars (845 ratings). Updated April 2026.
Web Developer
Adds a toolbar of developer utilities: disable CSS or JS, outline elements, resize the viewport, edit forms live.
1,000,000+ users, 4.5 stars (2.8K ratings). Built by Chris Pederick, updated June 2024.
Awesome Screenshot & Screen Recorder
Captures full page screenshots and screen recordings in one extension, with annotation and instant sharing.
Now listed as Awesome Screen Recorder & Screenshot. 4,000,000+ users, 4.7 stars (29.5K ratings), updated Sept 2026.
daily.dev
Replaces the new tab page with a personalized developer news feed pulled from GitHub, Hacker News and Dev.to.
Renamed and rebranded to daily.dev. 400,000+ users, 4.8 stars (2.9K ratings), updated Sept 2026.
JSONView
Formats raw JSON responses into a readable, collapsible, color coded tree directly in the browser tab.
Now distributed as JSONVue, same project. 900,000+ users, 4.5 stars (2.6K ratings). Last updated Nov 2023.
JSON Lite
Open source JSON viewer that turns a raw JSON document into a readable, collapsible tree in the browser tab.
Source on GitHub, 173 commits. Also published to Edge, Firefox, Opera and Safari stores.
Window Resizer
Switches the browser window between preset device resolutions to test responsive layouts without opening DevTools.
700,000+ users, 4.3 stars (2.3K ratings). Updated July 2024.
Responsive Viewer
Renders a page at several screen sizes side by side in one window, for quick responsive design checks.
400,000+ users, 4.2 stars (351 ratings). Updated August 2026.
BrowserStack
Launches the current page straight into BrowserStack's real device and browser cloud for cross browser testing.
100,000+ users, 2.8 stars (100 ratings). Needs a BrowserStack account; updated Aug 2026.
VisBug
Open source design tool that lets you select, move, resize and restyle live page elements directly in the browser.
200,000+ users, 4.8 stars (281 ratings). Updated Nov 2024.
PerfectPixel
Overlays a semi-transparent design mockup image on the live page so you can compare it pixel by pixel against a build.
300,000+ users, 4.3 stars (638 ratings). Core overlay is free, extra layers need a paid upgrade. Updated Sept 2026.
Site Palette
Extracts a color palette from any website's rendered page and exports it to tools like Figma or Sketch.
90,000+ users, 3.8 stars (264 ratings). Free 24 hour trial, paid plans run up to $99 lifetime.
ColorZilla
Advanced eyedropper, color picker and CSS gradient generator, with a page color palette analyzer built in.
4,000,000+ users, 4.6 stars (3.9K ratings). Updated May 2024.
Imageye: Image Downloader
Finds every image on a page, filters by size or URL, then bulk downloads or converts them to another format.
2,000,000+ users, 4.9 stars (16.7K ratings). Updated Sept 2026.
GoFullPage: Full Page Screen Capture
Captures a full scrolling page as one screenshot, then exports it as PNG or PDF with simple edit and share tools.
11,000,000+ users, 4.9 stars (84.2K ratings). Updated Sept 2026.
Stylebot
Writes custom CSS for any website through a visual style editor, and keeps those tweaks applied on every visit.
200,000+ users, 4.3 stars (1.6K ratings). Updated Sept 2026.
ColorPick Eyedropper
Zoomed eyedropper that picks any pixel color on a page and copies its hex, RGB or HSL value to the clipboard.
1,000,000+ users, 4.2 stars (1.2K ratings). Updated Oct 2025.
React Developer Tools
Adds Components and Profiler tabs to Chrome DevTools for inspecting React component trees and render performance.
5,000,000+ users, 3.9 stars (1.6K ratings). Built and maintained by Meta, updated Sept 2026.
Wappalyzer
Detects the frameworks, CMS, analytics, hosting and payment tools a site runs on, shown as a toolbar badge.
Now listed as Wappalyzer, Technology profiler. 3,000,000+ users, 4.6 stars (2K ratings), updated Sept 2026.
Fake Filler
Fills every input, select and textarea on a form with randomly generated test data in a single click.
400,000+ users, 4.4 stars (793 ratings). Updated Aug 2024.
Web Editor
Lets you edit a live page's text, images and layout visually in the browser, then export the result as code.
10,000+ users, 4.2 stars (34 ratings). Small user base, last updated Sept 2023.
Fonts Ninja
Hovers over any text to reveal the font name, foundry, weight and price, with a saved font library for later.
900,000+ users, 4.4 stars (904 ratings). Updated Sept 2026, also ships for Firefox and Safari.
Lighthouse
Runs Google's open source audit for performance, accessibility, SEO and best practices on any page, on demand.
1,000,000+ users, 4.4 stars (334 ratings). Built by Google Ireland Ltd, updated June 2026.
Debug CSS
Outlines every element on a page with a colored border to expose layout structure, toggled with Alt Shift C.
10,000+ users, 4.5 stars (48 ratings). Updated March 2025.
Angular DevTools
Extends Chrome DevTools with Angular specific component tree inspection and change detection profiling.
Now listed as Angular DevTools, maintained by the Angular team. 300,000+ users, 3.7 stars (190 ratings).
Best Chrome Extensions for Web Developers & Designers
Chrome extensions for developers can dramatically boost productivity by bringing debugging tools, design inspectors, accessibility checkers, and performance auditors directly into your browser. The right set of browser extensions makes your daily development workflow faster and more efficient.
ColorZilla and VisBug cover color picking and live page editing, while GoFullPage stays the simplest way to capture an entire scrolling page as one image, with 11 million users behind it. For framework work, React Developer Tools and Wappalyzer solve different problems: one inspects a React tree you are building, the other identifies the stack of a site you did not build. Lighthouse remains the reference for performance audits, built and shipped by Google itself.
The trap here is ownership and naming: extensions get sold, renamed or rebranded without changing their store ID (daily.dev used to be News for Busy Developers, JSONVue used to be JSONView), and some once-popular listings quietly vanish from the store. Check the last update date and install count before trusting anything that asks for broad page permissions.
What to check before you pick one
- DevTools integration: Extensions that add panels to Chrome DevTools (React DevTools, Vue devtools) provide the deepest inspection capabilities.
- Performance impact: Avoid installing too many extensions simultaneously as they can slow page loads; enable them as needed.
- Maintenance status: Check that extensions are actively maintained and updated for recent Chrome versions to avoid compatibility issues.
Frequently Asked Questions
What are the must-have Chrome extensions for web developers?
Essential Chrome extensions for web developers include React DevTools, Vue.js devtools, Lighthouse (performance auditing), axe DevTools (accessibility), ColorZilla (color picker), WhatFont (font identifier), and JSON Formatter. These directly integrate with your development workflow.
What Chrome extensions help with web design?
Useful design Chrome extensions include Eye Dropper (color picker from any webpage), WhatFont (identify fonts in use), CSS Peeper (inspect CSS styles), PixelParallel (design overlay comparison), and Page Ruler Redux (measure distances on screen).
Are developer Chrome extensions free?
Most essential developer Chrome extensions are completely free. Extensions like React DevTools, Vue DevTools, Lighthouse, axe DevTools, ColorZilla, and WhatFont are all free in the Chrome Web Store. Some advanced extensions offer paid premium tiers for additional features.