Download video thumbnails from YouTube, Vimeo, Dailymotion, and other video platforms in the highest available resolution directly from your browser. This extension is currently in development and has not been released yet.

Thumbnail Downloader is an upcoming browser extension that will provide a fast, reliable way to grab thumbnail images from video pages without relying on third-party websites or manual URL manipulation. It is being built to work natively inside the browser so you can extract, preview, and save thumbnail images in full resolution while browsing any supported video platform.

• Extract thumbnails from YouTube, Vimeo, Dailymotion, and additional video platforms
• Retrieve the highest resolution version available for each video
• Preview thumbnails before saving them to your machine
• Batch download thumbnails from playlists and channel pages
• Designed for Chrome, Edge, Brave, Opera, Firefox, and other Chromium browsers

This extension is not yet available for download. Development is in progress and a release date has not been announced. Sign up below to get notified when it launches.

🔔 Get notified when this launches: Join the waitlist

• ⏳ Waitlist: Coming Soon — Sign Up
• ❓ Help center: SERP Help
• 💡 Request features: GitHub Issues

• Why Thumbnail Downloader
• Planned Features
• How It Will Work
• Supported Platforms
• Who It's For
• Use Cases We're Building For
• FAQ
• License
• Notes
• About Video Thumbnails

Video platforms generate multiple thumbnail sizes for every uploaded video, but they rarely give users a direct way to access or download those images. On YouTube, you can piece together a thumbnail URL by hand if you know the naming convention, but the process is fragile and changes when Google updates its CDN structure. Vimeo, Dailymotion, and other platforms bury their thumbnail assets even deeper, often requiring API calls or page source inspection to locate the right image URL.

Existing workarounds involve pasting video URLs into third-party thumbnail grabber websites, which introduces privacy concerns, ad-heavy interfaces, and unreliable results. These services frequently fail to return the maximum resolution or only support a single platform. Users who need thumbnails regularly, whether for content creation, research, or archiving, end up wasting time on a task that should be trivial.

Thumbnail Downloader is being designed to eliminate that friction entirely. It will detect video pages as you browse, surface all available thumbnail resolutions in a clean popup interface, and let you save the image you want with a single click. No URL copying, no external websites, no guesswork about resolution tiers.

• Automatic detection of video pages across supported platforms
• Extraction of all available thumbnail resolutions from each video
• One-click download of the highest resolution thumbnail image
• Resolution selector for choosing between available quality tiers
• Thumbnail preview within the extension popup before downloading
• Batch thumbnail extraction from playlist and channel pages
• Custom file naming with video title, channel name, and resolution tags
• Cross-browser compatibility targeting Chrome, Edge, Brave, and Firefox

1. Install the extension once it is released.
2. Navigate to any supported video page in your browser.
3. The extension icon will indicate that thumbnails are available on the current page.
4. Click the extension icon to open the popup interface.
5. Browse all detected thumbnail resolutions displayed as a preview grid.
6. Select the resolution you want or choose the maximum available quality.
7. Click download to save the thumbnail image to your local machine.
8. For playlists or channel pages, use the batch mode to queue multiple thumbnails.

• YouTube — standard videos, Shorts, live streams, and playlist thumbnails
• Vimeo — public and unlisted video thumbnail extraction
• Dailymotion — video page and embedded player thumbnail retrieval
• Additional platforms will be evaluated during development based on user requests

Each platform delivers thumbnails through different CDN structures and API patterns, so support levels may vary by platform at launch.

• Content creators who need thumbnails for reaction videos, commentary, or compilations
• Graphic designers building mood boards or visual references from video content
• Social media managers repurposing video thumbnails for cross-platform promotion
• Researchers archiving visual metadata from video collections
• Bloggers and journalists who reference video content in written articles

• Grab a high-resolution YouTube thumbnail for a blog post or article header
• Collect thumbnails from a competitor's channel to study visual branding patterns
• Archive thumbnail images from a playlist before videos are removed or made private
• Download Vimeo thumbnails for client presentations or creative briefs
• Save reference thumbnails for designing your own video cover images
• Extract Dailymotion thumbnails for educational or research documentation

When will Thumbnail Downloader be released? A release date has not been set. Sign up at the waitlist link above to be notified as soon as it is available.

Which video platforms will it support at launch? YouTube is the primary target, with Vimeo and Dailymotion planned for launch or early updates. Additional platforms will be added based on demand and feasibility.

What image resolutions will be available? Resolution options depend on what each platform generates. YouTube, for example, typically provides thumbnails from 120x90 up to 1920x1080 (maxresdefault). The extension will surface every available resolution and let you pick.

Will it work with private or age-restricted videos? The extension will work with whatever thumbnails the browser can access on the current page. If a thumbnail is visible to your browser session, the extension should be able to extract it.

Is it free? Pricing details will be announced closer to launch. SERP extensions typically include a free trial period.

Can I download thumbnails in bulk from a playlist? Batch downloading from playlist and channel pages is a planned feature. The exact workflow will depend on how each platform structures those pages.

This repository is distributed under the proprietary SERP Apps license in the LICENSE file. Review that file before copying, modifying, or redistributing any part of this project.

• This extension is in development and is not available for download yet
• Only download and use thumbnail images in accordance with applicable copyright and fair use guidelines
• Available resolutions depend on what each video platform generates and serves
• Platform changes to CDN structures or page layouts may affect functionality once released
• An active internet connection is required to browse video pages and extract thumbnails

Video thumbnails are the static preview images that represent a video across platforms like YouTube, Vimeo, and Dailymotion. They serve as the primary visual hook that drives click-through rates and viewer engagement. Platforms automatically generate multiple resolution variants of each thumbnail for use across devices, search results, and embedded players, but they do not offer a built-in way to download those images at full resolution. Thumbnail Downloader is being built to surface those hidden resolution tiers and make saving them as simple as clicking a button.