YouTube Thumbnail Preview Tool
Preview and compare YouTube thumbnails and draft titles at desktop, mobile, and compact sizes. Images are processed locally; no sign-up needed.
Images stay in your browser. PNG, JPEG, or WebP, up to 20 MB. Non-16:9 images are center-cropped for this preview; use the Image Resizer to prepare the final file.
Variant A
Upload a thumbnail to see the preview
Your video title
Your channel
Approximate layout previews. YouTube can display titles and thumbnails differently across devices. This tool does not run an audience A/B test or predict click-through rate.
How to use this tool
- Upload your thumbnail. Choose a PNG, JPEG, or WebP image. You can add a second image for comparison.
- Add draft titles. Enter a video title and channel display name. An optional second title can accompany your second image.
- Inspect smaller layouts. Switch between desktop, mobile, and compact previews. Check legibility and title truncation.
FAQ
Does this tool test click-through rate?
No. It previews appearance at several approximate sizes. Actual audience testing and measured performance require a separate experiment, such as the testing features available in YouTube Studio.
How can I compare two thumbnails?
Upload variants A and B, then inspect them at the same size. Use a different title for B or leave its title blank to compare both with the same title.
What happens to my uploaded images?
They remain in your browser. The preview does not upload them to a server or publish anything on YouTube.
Why does my image look cropped?
The thumbnail frame uses a 16:9 aspect ratio and center-crops other shapes. Prepare a 16:9 export with our Image Resizer if you want to control the final crop.
More free creator tools
Prepare images and inspect your content with our browser-based tools.