01
Upload your thumbnail
Drop in a PNG or JPG. Set the title, channel, view count and age so the card looks exactly like your video will once it goes live.
your thumbnail
10:42
drop a 1280 × 720 .png
10:42Y
Your title is gonna be here
your channel
the youtube thumbnail test lab
your thumbnail, tested in the real feed.
Drop a PNG into a pixel-accurate clone of YouTube, surrounded by real videos pulled from the platform. See exactly how it reads on desktop, mobile, and the watch page. Then publish with proof.
No account, no upload limits. Your thumbnail never leaves the browser.
how it works
Three steps from guess to proof.
No plugins, no exporting into a mockup file. Test the thumbnail in the place it has to win, before anyone else sees it.
02
Drop it into real YouTube
It lands in a live feed of real videos, on the desktop homepage, the mobile app, or a watch page. The same context your viewers actually scroll past.
03
Squint, blur, flash-test
Blur it down, drain the color, or flash the whole feed for one second. If it still pulls the eye at a glance, it will pull the click.
what you can do
Every way a thumbnail gets seen.
three real surfaces
Not a mockup. The actual feed.
Your thumbnail sits inside a clone of YouTube that matches the real thing pixel for pixel, across every place a viewer meets it.
- Desktop homepage grid
- Mobile app, in an iPhone frame
- Watch page, in the recommended rail
42:57M
Last To Leave Grocery Store, Wins $250,000
48:19M
Survive 1000 Days, Win $100,000
28:17R
I Tried Every Room on the Most Expensive Cruise
42:57A
How Many Days Can I Secretly Live In a Grocery Store?
every screen
It reads on every screen.
A thumbnail that wins on the desktop grid can fall apart on a phone. Preview the exact mobile app layout, then flip to the watch page to check it in the recommended rail.
- Mobile app, in a true iPhone frame
- Watch page, in the recommended rail
- Desktop homepage grid
9:39Z
Can VFX Artists Beat AI?
47:05M
I Trained Like A Samurai in Japan
38:38C
Why the Biggest YouTube Family Just Went to Netflix: Jordan Matter
25:27Y
Exploring the World's Largest $100 Billion Failed Ghost City (why did nobody move here?)
34:31M
Utah man's double life got him KILLED
1:59:03J
John Kiriakou: "He Sold Us Secrets!" How Jefferey Epstein Ran Mossad, MI6, and The CIA│Jack Neel
the squint test
Blur it. Drain it. Still readable?
Great thumbnails survive a squint. Blur the whole feed and pull the color out to see if your focal point and text still cut through at a glance.
- Adjustable blur, live
- One-tap grayscale
- Safe-area overlay for the timestamp
26:34M
Ronaldo vs My Unbeatable Goalie Robot
18:34D
HOW MANY BALLOONS TO FLY? (Mini Games Battle)
9:39Z
Can VFX Artists Beat AI?
47:05M
I Trained Like A Samurai in Japan
real competition, real output
Tested against real videos.
The surrounding cards are pulled from actual channels, so you are up against the same titles and thumbnails your video will be. When it reads right, export a clean PNG to share.
- Live feed from real creators
- Desktop, mobile and watch layouts
- One-click PNG export, up to 3x
19:32D
Guy Asks The WRONG TWIN To PROM Ft. Brooks Harvey | Dhar Mann Studios
47:28S
SIDEMEN GUESS THE FOOTBALLER ft Erling Haaland
1:21:43M
SIDEMEN AMONG US 15 MAN SPECIAL: ULTRA CHAOS MODE
33:59S
SIDEMEN REACTS BUT ONE OF US IS AN IMPOSTOR: TIKTOK EDITION
Stop guessing. See it in the feed.
It takes about a minute. Drop your thumbnail in, squint, flash-test, and publish knowing it earns the click.
Go to the tool