Preview and test your thumbnails directly on YouTube

Latest Version

Version
1.1.0
Update
October 30, 2024
Size
332KiB
Developer
thumbnailboss.com
Category
Users
15
Rating
5 ★
Manifest Version
3
Web Store Status
Languages Support
English
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Permissions
Tabs
WebNavigation
Storage
UnlimitedStorage
SidePanel
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Thumbnail Boss - YouTube thumbnail previewer Extension

Preview your youtube video thumbnail and title directly within your YouTube homepage / search page or video recommendation and grow your channel to new heights.

Let’s get those watch hours up, let’s increase your video virality, let's grow that channel.

As a YouTuber, seeing your upcoming video's thumbnail in context is crucial to knowing if it stands out or blends in with other content.

A good thumbnail is the entry/growth gate of your video. It does not matter how good your video is if users don’t get to see it.

It is said with a good thumbnail preview
● ✅ Bring 30-40% more views to a video
● ✅ Give your video the chance to go viral
● ✅ Increase watch hours of any video

No more screenshots of youtube homepage where you paste your thumbnails. With Thumbnail Boss, you simply upload your thumbnail and enter the video title and see it on your live youtube page — no extra steps required!

➤ Unlimited experiments - Test all your thumbnails
➤ Test with your personalized feed - See thumbnail preview in the most common youtube growth areas: Homepage/Search/Video recommendation
➤ Test and preview your youtube thumbnail in search
➤ Free - We’ve been quite lazy so most of it is free
➤ No login needed: Securely use the tool without providing any credentials.

Established content creators have admitted to working backwards from a thumbnail & title to actually making the video.

Let’s grow your channel!
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Source Manifest.json

{"update_url": "https://clients2.google.com/service/update2/crx", "manifest_version": 3, "version": "1.1.0", "author": "Bluepixel", "name": "Thumbnail Boss - YouTube thumbnail previewer", "short_name": "Thumbnail Boss", "description": "Preview and test your thumbnails directly on YouTube", "minimum_chrome_version": "111.0", "icons": { "16": "assets/icons/16.png", "32": "assets/icons/32.png", "48": "assets/icons/48.png", "128": "assets/icons/128.png" }, "background": { "service_worker": "service-worker.js" }, "side_panel": { "default_path": "sidepanel/index.html" }, "content_scripts": [ { "all_frames": false, "js": [ "content-scripts/inject-thumbnail.js" ], "match_about_blank": false, "matches": [ "https://*.youtube.com/*" ], "run_at": "document_start" } ], "permissions": [ "tabs", "webNavigation", "storage", "unlimitedStorage", "sidePanel" ], "host_permissions": [ "https://*.youtube.com/*" ], "web_accessible_resources": [ { "resources": ["assets/icons/48.png"], "matches": ["https://*.youtube.com/*"] } ]}
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How to download and manually install Thumbnail Boss - YouTube thumbnail previewer extension for Chrome

Looking for a way to install Thumbnail Boss - YouTube thumbnail previewer 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 Thumbnail Boss - YouTube thumbnail previewer extensions manually, this article outlines two simple methods to effortlessly install Thumbnail Boss - YouTube thumbnail previewer extensions, whether they come as unpacked folders in compressed formats like .zip or as .crx files.

Method 1: Download Thumbnail Boss - YouTube thumbnail previewer extension and manually install through Drag &Drop

If you ever need to manually install a Thumbnail Boss - YouTube thumbnail previewer 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 Thumbnail Boss - YouTube thumbnail previewer Extension by clicking the "Download CRX" button on the website.

Look for the Thumbnail Boss - YouTube thumbnail previewer extension you wish to install. Go to the website and download the Thumbnail Boss - YouTube thumbnail previewer extension package, which is usually a .CRX file and comes in a zipped file. Here ".crx" file is the format for Thumbnail Boss - YouTube thumbnail previewer 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 Thumbnail Boss - YouTube thumbnail previewer 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 Thumbnail Boss - YouTube thumbnail previewer extension for Chrome and install in Developer Mode

This is another method to install Thumbnail Boss - YouTube thumbnail previewer 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 Thumbnail Boss - YouTube thumbnail previewer extension file

Select and download the Thumbnail Boss - YouTube thumbnail previewer 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 Thumbnail Boss - YouTube thumbnail previewer 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 Thumbnail Boss - YouTube thumbnail previewer 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 Thumbnail Boss - YouTube thumbnail previewer 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 Thumbnail Boss - YouTube thumbnail previewer extension in 2 ways. We hope this guide proves helpful.

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