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Online Free YouTube Thumbnail Downloader
Online UniConverter is a one-click online and free YouTube thumbnail downloader.
How to download YouTube thumbnail?
Step 1. Click the YouTube Thumbnail Downloader extension icon on the top right corner of your Chrome browser. It will open the online free YouTube thumbnail downloader.
Step 2. Copy and Paste the YouTube URL to the text box.
Step 3. Click the Go button to start downloading YouTube thumbnail.
Step 4. Choose output image size; then, right-click and select "Save image as..." to save your preferred YouTube video thumbnail image.