# YouTube thumbnail tester

> Drop your cover image and type the title. See them as a YouTube card next to other cards, on the home grid, in a search list and on a phone, before you upload.

Source: https://clipscript.app/youtube-thumbnail-tester · Updated: 2026-10-29 · Publisher: ClipScript

## Preview your thumbnail

Upload a cover image and a title; they are shown beside real-looking YouTube cards on desktop and phone.

## How do you test a YouTube thumbnail before uploading?

Drop the 1280×720 image above and type the title. The page draws it as a YouTube card between placeholder cards in the three places a viewer meets it: the home grid, a search result list and a phone feed. Look at it small: a cover that reads at 320 pixels wide is one that works. The title counter shows where YouTube cuts long titles. Everything stays in your browser; nothing is uploaded and nothing is charged.

- **Views:** Home grid, search list, phone
- **Title:** Counter to 100; cut around 60–70 on most screens
- **Image:** Any image up to 20 MB; 1280×720 recommended
- **Cost:** Free, no account

## How to preview a thumbnail

1. **Drop the cover** A 1280×720 JPG or PNG, up to 20 MB. It is drawn into the card at the size YouTube would show it.
2. **Type the title** The counter shows the length; YouTube shows about 60–70 characters on most screens and cuts the rest.
3. **Switch views** Home, Search and Phone. If the cover is unreadable in the phone view, it will be unreadable to most viewers.

## Thumbnail tester questions

### Is this an A/B test on YouTube?

No. It is a preview on this page. YouTube's own Test & Compare, in YouTube Studio, runs a real test on viewers; this tool helps you pick which covers to put into it.

### Why placeholder cards?

A thumbnail is never seen alone; it is seen next to others. The grey cards stand in for them so you judge the cover in company.

### Does it score or rate the thumbnail?

No. It shows it; you judge. A score would be a number we cannot stand behind.

### Is the image uploaded?

No. The picture stays in your browser; refresh the page and it is gone.

## Need a cover to test?

Describe the picture and get a 1280×720 thumbnail from an image model.

[Open the AI thumbnail maker](https://clipscript.app/)