Create eye-catching YouTube video thumbnails formatted to Google's official recommendations: 1280 pixels wide by 720 pixels high, 16:9 ratio, and under 2MB.
Specifications & Details
Feature
Specification
Execution Mode
In-Browser (Client-Side WebAssembly / JS)
Privacy Guarantee
Zero Server Transfer — 100% Local Device Processing
Supported Formats / Inputs
image, resize, dimensions
Pricing & Usage Limits
100% Free Forever — No Signup, Unlimited Use
Browser Compatibility
Chrome, Firefox, Safari, Edge, Mobile Browsers
About this tool
Resize Image: Resize images to specific dimensions. Processing runs locally in your browser — your input is not uploaded to ThothBox.
Common Use Cases for image tools
When you need to create eye-catching YouTube video thumbnails formatted to Google's official recommendations: 1280 pixels wide by 720 pixels high, 16:9 ratio, and under 2MB, YouTube Thumbnail Resizer (1280x720) handles it right in your browser — no download or installation required.
Use YouTube Thumbnail Resizer (1280x720) to prepare data before sharing or archiving it: everything stays on your device.
YouTube Thumbnail Resizer (1280x720) works on any computer, including shared or locked-down machines where you cannot install software.
Bookmark YouTube Thumbnail Resizer (1280x720) for repeatable tasks: open the page, run the job, download the result — free and unlimited.
Key Advantages
Zero server upload. Your files are processed entirely in your browser and never reach ThothBox servers.
Instant results. No upload queues or waiting rooms: the job runs at native browser speed on your own hardware.
No registration. No account, email, or usage limits — open the page and start working immediately.
How to use
Open Resize Image and add your file (upload or drag and drop).
Set the options that match your goal.
Run the action — processing happens in your browser.
Download or copy the result when it is ready.
FAQ
What is the optimal size for a YouTube thumbnail?
1280x720 pixels with a 16:9 aspect ratio and file size under 2MB in JPG, PNG, or WebP format.