Inject javascript to the webpage you are visiting

Latest Version

Version
1.2
Update
June 16, 2017
Size
59.53KiB
Developer
Category
Users
1,000+
Rating
4.22222 ★
Manifest Version
2
Web Store Status
Languages Support
English
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Permissions
ActiveTab
Storage
Tabs
ActiveTab
Http://*/
Https://*/
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Javascript Injector Extension

This extension allows you to inject any javascript code into the web page you are visiting. It remembers your page specific script and syncs it across all your devices.

For example, if you want to change the background color of https://duckduckgo.com/ with light blue, you can inject the script 'document.body.style.backgroundColor = \"lightblue\";' using this extension. After that every time you open this web site, the back ground will be light blue automatically.
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Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "manifest_version": 2, "name": "Javascript Injector", "author": "Daniel Han", "short_name": "JS injector", "description": "Inject javascript to the webpage you are visiting", "version": "1.2", "browser_action": { "default_icon": { "16": "images/icon16.png", "24": "images/icon24.png", "32": "images/icon32.png", "128": "images/icon128.png" }, "default_title": "Javascript Injector", "default_popup": "popup.html" }, "background": { "scripts": ["background.js"] }, "permissions": [ "activeTab", "storage", "tabs", "activeTab", "http://*/", "https://*/" ]}
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How to download and manually install Javascript Injector extension for Chrome

Looking for a way to install Javascript Injector 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 Javascript Injector extensions manually, this article outlines two simple methods to effortlessly install Javascript Injector extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download Javascript Injector extension and manually install through Drag &Drop

If you ever need to manually install a Javascript Injector 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 Javascript Injector Extension by clicking the "Download CRX" button on the website.

Look for the Javascript Injector extension you wish to install. Go to the website and download the Javascript Injector extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for Javascript Injector 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 Javascript Injector 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 Javascript Injector extension for Chrome and install in Developer Mode

This is another method to install Javascript Injector 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 Javascript Injector extension file

Select and download the Javascript Injector 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 Javascript Injector 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 Javascript Injector 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 Javascript Injector 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 Javascript Injector extension in 2 ways. We hope this guide proves helpful.

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User reviews

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D_00 (ID: 000000d6f72f5e7f) Voted 3 ★ - Updated 04/24/2022 Okay tool I would say, but it would have been nice if the GUI was reworked a bit, and if it actually supported the `window.addEventListener(func)`. For me this never triggers, and I have to sometimes run the code at a point that it only affects part of the page because other elements have not fully charged yet.

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Valen Valenzaa (ID: 0000001204a61269) Voted 5 ★ - Updated 03/08/2022 มันใช้กับ google form ได้ยอดเยี่ยม สนใจวิธีใช้ติดต่อ ดาบดำ วาเลนไทน์ บนเฟคบุ็ค

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Ivan Pruchai (ID: 00000041e58b2695) Voted 4 ★ - Updated 02/04/2020 It works, but after page reloaded you need to paste code and save again.

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Yassine Safraoui (ID: 000000a14df3303b) Voted 5 ★ - Updated 08/02/2019 Works like charm, but there is a feature I miss tough, since you can remember the code running on a website, it would be preferred to make like a list of snippets the user can run, or disable on a website real quickly.

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Steve Wood (ID: 00000009014a000e) Voted 5 ★ - Updated 01/02/2019 It worked for me