Thumbnail Preview - YouTube Thumbnail Testing

Name: Thumbnail Preview - YouTube Thumbnail Testing
Rating: 4.9 (10 reviews)
Author: Thumbnail Preview

Preview and test your thumbnails directly on YouTube

As of June 2026, Thumbnail Preview - YouTube Thumbnail Testing has 747 users and a 4.90/5 rating from 10 reviews in the Productivity category.

Thumbnail Preview Productivity★ Featured

Chrome Web Store ↗.crx

Users+7.8%

747

Rating−2.0%

4.90

10 reviews

Reviews+11.1%

Version

2.4.1

Manifest V3

History

9 snapshots

Tracking since Apr 1, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 1, 2026	693	5.00	9	2.4.1
Apr 9, 2026	708	4.90	10	2.4.1
Apr 20, 2026	722	4.90	10	2.4.1
Apr 25, 2026	725	4.90	10	2.4.1
May 6, 2026	744	4.90	10	2.4.1
May 12, 2026	735	4.90	10	2.4.1
May 21, 2026	752	4.90	10	2.4.1
May 31, 2026	757	4.90	10	2.4.1
Jun 8, 2026	765	4.90	10	2.4.1
Now	747	4.90	10	2.4.1

Permissions & access

Permissions: storageunlimitedStorage
Host access: https://*.youtube.com/*

Screenshots

Thumbnail Preview - YouTube Thumbnail Testing screenshot 1

Thumbnail Preview - YouTube Thumbnail Testing screenshot 2

Thumbnail Preview - YouTube Thumbnail Testing screenshot 3

Thumbnail Preview - YouTube Thumbnail Testing screenshot 4

Thumbnail Preview - YouTube Thumbnail Testing screenshot 5

About

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 Preview, 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!