Detects unused CSS and JS files on web pages

Latest Version

Version
1.0
Update
March 20, 2025
Size
20.88KiB
Developer
Category
Users
0
Rating
0 ★
Manifest Version
3
Web Store Status
Languages Support
English (United States)
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Permissions
ActiveTab
Storage
DeclarativeNetRequest
DeclarativeNetRequestFeedback
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Unused CSS/JS Detector Extension

Unused CSS/JS Detector
Optimize Your Web Development Workflow with Precision

Enhance your web development efficiency with the Unused CSS/JS Detector, a powerful Chrome extension designed for developers and web optimization enthusiasts. This tool helps you identify and manage unused CSS and JavaScript files on any webpage, streamlining your optimization process and improving page load performance.

Key Features:
1. Detect Unused Resources: Automatically scans the current page to pinpoint unused CSS stylesheets and JavaScript files, saving you valuable time during audits.
2/ Block/Unblock Functionality: Easily block detected unused resources with a single click and unblock them when needed, with changes persisting across sessions.
3. Real-Time Load Time Tracking: Monitor page load times with precision (down to 0.000ms) and see performance improvements as you block resources.
4. Reset Option: Quickly reset all blocked resources with the \"Reset Blocks\" button to revert to the original state.
5. User-Friendly Interface: Features a clean popup with clickable links to resource URLs, truncated for readability with full URLs available on hover.

How It Works:
1. Click the extension icon to open the detector.
2. Analyze the page to see a list of potentially unused CSS and JS files.
3. Use the \"Block\" button to prevent resources from loading, and watch the load time update after a page refresh.
4. Unblock or reset as needed to fine-tune your optimization.

Perfect For:
- Web developers optimizing site performance
- Front-end engineers auditing codebases
- SEO specialists improving page speed
- Anyone looking to reduce bloat in web projects

Installation:
Simply add the Unused CSS/JS Detector to your Chrome browser, and start optimizing your web pages today!

Optimize smarter, not harder. Download the Unused CSS/JS Detector now and take control of your web resources!
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Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "manifest_version": 3, "name": "Unused CSS/JS Detector", "version": "1.0", "description": "Detects unused CSS and JS files on web pages", "permissions": [ "activeTab", "storage", "declarativeNetRequest", "declarativeNetRequestFeedback" ], "host_permissions": [ "" ], "background": { "service_worker": "background.js" }, "action": { "default_popup": "popup.html" }, "content_scripts": [ { "matches": [""], "js": ["content.js"] } ], "icons": { "16": "icon16.png", "48": "icon48.png", "128": "icon128.png" }}
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How to download and manually install Unused CSS/JS Detector extension for Chrome

Looking for a way to install Unused CSS/JS Detector extensions for Chrome, you can search for them in the Chrome Web Store, clicking the "Add to Chrome" button, and following the straightforward process.

However, you may need to install Unused CSS/JS Detector extensions manually, this article outlines two simple methods to effortlessly install Unused CSS/JS Detector extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download Unused CSS/JS Detector extension and manually install through Drag &Drop

If you ever need to manually install a Unused CSS/JS Detector extension for Chrome, don't worry, it's a simple process. Just follow these easy steps, and you will have your extension ready to use in no time.

Step 1: Download the Unused CSS/JS Detector Extension by clicking the "Download CRX" button on the website.

Look for the Unused CSS/JS Detector extension you wish to install. Go to the website and download the Unused CSS/JS Detector extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for Unused CSS/JS Detector extension that contains all the data.

Step 2: Extract &Arrange Files

Once the file is downloaded, extract that file into its own folder. Similarly, give that extension files a permanent home. In other words, keep it in a folder that you don't accidentally delete it because these files will be needed to make that extension work.

Step 3: Go to the Chrome Extensions Page

Open Google Chrome and in the address bar, type chrome://extensions; it will open the Google Chrome extensions page. Make sure that "My extensions" is selected in the sidebar.

Step 4: Drag and Drop the Extension

Now, go to the folder where you extracted the Unused CSS/JS Detector extension and drag &drop the extension file from there anywhere onto the extension page within Google Chrome.

Step 5: Complete the Installation

Once you drag and drop the extension file, follow the steps that Google Chrome takes you through. Similarly, if the extension file is of .crx file format, you will be required to review the permissions and then add the extension.

Now, you can manage that added extension as you would like to with any other Chrome extension that you added through Chrome Webstore. Its icon will also appear in the Google Chrome Menu on the right side of the address bar once you activate it.

Method 2: Download Unused CSS/JS Detector extension for Chrome and install in Developer Mode

This is another method to install Unused CSS/JS Detector extension manually, but the twist is that here, you install by enabling the developer mode option provided in Google Chrome. This mode is commonly used for testing extensions or running unpublished tools.

Step 1: Download the Unused CSS/JS Detector extension file

Select and download the Unused CSS/JS Detector extension by clicking the 'Download CRX' button on the website.

Step 2: Extract the downloaded contents

Convert the file to a ZIP file if it is in CRX format then extract the Unused CSS/JS Detector extension zip file or folder that you downloaded. Make sure you extract it using the same folder name and keep it safely in another folder, so you don't delete it by mistake. The extracted folder will be needed to keep your Unused CSS/JS Detector extension running.

Step 3: Open Chrome Extension Setting Page

In the address bar of Google Chrome, type chrome://extensions and open the Chrome Extension Page.

Step 4: Enable Developer Mode

After opening the Chrome Extension page, look at the top right side, and you will find the toggle option of "Developer mode."Simply enable that developer mode option.

Step 5: Load the Unpacked Extension

Once you enable the developer mode option, you will see the menu of Load Unpacked, Pack Extensions and Update. From that, select the option "Load unpacked."

Step 6: Select the Extension Folder

Once the pop-up opens upon clicking Load unpacked, select the Unused CSS/JS Detector extension directory and click on the "Select Folder "button.

Step 7: Confirm and Install

After you select an extension folder of a Google Chrome extension you're installing manually, confirm its installation for the final time and let the installation complete.

Conclusion

Here we've made a step-by-step guide on How to manually install Unused CSS/JS Detector extension in 2 ways. We hope this guide proves helpful.

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