Bulk YouTube thumbnails.
One click.
Stop screenshotting. Stop searching for sketchy downloaders. ThumbBatch gets the highest-quality YouTube thumbnails directly from your browser — individually or in bulk.
The old way is ridiculous.
9 painful steps
3 steps. That's it.
Features
One tiny extension.
A lot less friction.
Instant extraction
Get the thumbnail. Not the hassle.
Open a YouTube video, click ThumbBatch, and get the highest-quality thumbnail available. No URL copying. No new tabs. No third-party websites.
Bulk mode
One page. Dozens of thumbnails.
Browsing a channel or search results? ThumbBatch finds the videos on the page and lets you select and package their thumbnails into one ZIP.
Smart quality
Always reach for the best available quality.
ThumbBatch checks YouTube's available thumbnail variants and gracefully falls back when the highest-resolution asset isn't available.
Private by design
Your thumbnails stay yours.
ThumbBatch runs locally in your browser. There is no account, backend, analytics pipeline, or tracking system quietly collecting what you download.
Built for people who collect ideas.
Creators
Save competitor thumbnails for inspiration and research.
Designers
Grab clean visual references for moodboards, Figma projects, and presentations.
Researchers
Archive and compare how channels package ideas visually.
How it works
Three seconds. Three steps.
Open YouTube
Find the video, channel, or search results you need.
Open ThumbBatch
The extension automatically understands what is on the page.
Download
Save a thumbnail or package an entire selection into a ZIP.
Bulk Mode
Your whole thumbnail grid.
One ZIP.
Stop downloading thumbnails one by one.
Private by default.
ThumbBatch doesn't need your data to do its job.
No account
Install it and use it.
No tracking
No analytics or browsing history collection.
No backend
Processing happens locally in your browser.
Free forever
No subscriptions or artificial limits.
Open Source — MIT License
Inspect the source on GitHub ↗$0
Seriously.
ThumbBatch is completely free.
Installation
Get started in under a minute.
Download ThumbBatch from GitHub.
Open GitHub ↗Open Chrome extensions.
chrome://extensions/Enable Developer mode.
Toggle it in the top right corner of the page.
Click “Load unpacked”.
Select the ThumbBatch src folder.
Choose the /src directory from the downloaded repository.
Pin ThumbBatch to your toolbar.
Click the puzzle icon → pin ThumbBatch.
Chrome Web Store availability may come later. For now, you can install the open-source build directly.
Extensions
ThumbBatch
Bulk YouTube thumbnails. One click.
✓ You're ready.
Under the hood
Small interface. Serious engineering.
Manifest V3
Modern Chrome extension architecture for security and performance.
Smart resolution fallback
The extension doesn't blindly assume the largest thumbnail exists.
Local ZIP generation
Bulk archives are created locally in the browser using fflate.
Minimal permissions
ThumbBatch requests only what it needs, nothing more.
No backend
There is no server processing user requests.
Don't trust us.
Read the code.
ThumbBatch is open source. See exactly what the extension does.
FAQ
Stop hunting for thumbnails.
Install ThumbBatch and get back to the thing you actually wanted to do.