YouTube Preview Tool

Preview Your YouTube Thumbnail
Before Uploading

Test how your thumbnail looks in search results, home feed, watch page, mobile, and Shorts — with text overlays, badges, A/B comparison and dark mode. Free, no signup.

👁 Live Preview

YouTube
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Preview in 6 Easy Steps

No signup. No watermarks. Just a perfect YouTube thumbnail preview in seconds.

1

Upload Your Thumbnail

Click the upload zone and select your image. The tool supports JPG, PNG, WebP and GIF formats.

2

Set Video Details

Enter your video title, channel name, view count, upload date, duration and subscriber count.

3

Add Text Overlay

Optionally add title text on your thumbnail with full font, size, color, shadow and position controls.

4

Toggle Badges

Enable NEW, LIVE, HD, CC, 4K badges and set the duration badge position on your thumbnail.

5

Switch Preview Contexts

Instantly switch between Home Feed, Search Results, Watch Page, Mobile, and Shorts previews.

6

Compare & Screenshot

Upload a second thumbnail for A/B comparison, then download a PNG screenshot of any view.

The Most Complete YouTube Thumbnail Preview Tool

A great thumbnail can double your click-through rate — but most creators upload blind, only seeing how it looks after publishing. Our free YouTube thumbnail preview tool lets you test your thumbnail in every context before you upload a single file to YouTube.

Preview your thumbnail in the Home Feed grid, Search Results list, Watch Page player and sidebar, YouTube Mobile app, Shorts feed, and A/B side-by-side comparison mode. Toggle between dark and light YouTube themes, add text overlays, test badge placements, and simulate watch progress bars.

Everything runs in your browser. Your images and data never leave your device — no uploads to any server, complete privacy, completely free.

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5 YouTube Preview Contexts

Instantly see your thumbnail in Home Feed, Search Results, Watch Page sidebar, YouTube Mobile app, and Shorts feed.

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Text Overlay Editor

Add up to 2 lines of text directly on your thumbnail with full control over font size, weight, color, shadow, background style, and 9-point position grid.

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A/B Thumbnail Comparison

Upload two different thumbnails and compare them side by side in a real YouTube card grid to pick your winner.

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Badges & Labels

Toggle NEW, LIVE, HD, CC, 4K corner badges. Set duration badge position. Add playlist labels and sponsored tags.

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Light & Dark YouTube Theme

Switch between YouTube's light and dark UI themes to ensure your thumbnail stands out in both environments.

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Safe-Zone Grid Overlay

Enable the safe-zone grid to check that critical text and faces won't be cropped by YouTube's thumbnail masking.

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Mobile App Preview

See exactly how your thumbnail looks in the YouTube mobile app with a realistic phone frame, header, and chip filters.

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One-Click Screenshot

Download a high-quality PNG of any preview context with a single click — no watermarks, no account required.

Frequently Asked Questions

Everything you need to know about the YouTube thumbnail preview tool.

Is this YouTube thumbnail preview tool free? +
Yes, completely free. No account, no subscription, no hidden fees, no watermarks.
What is the best YouTube thumbnail size? +
YouTube recommends 1280×720 pixels (16:9 aspect ratio). The maximum file size is 2MB. JPG is the most common format used by creators.
Can I compare two thumbnails side by side? +
Yes. Upload your first thumbnail in the Thumb tab, then upload a second thumbnail in the A/B tab. Click the A/B context button to see both side by side in a realistic YouTube card layout.
Can I see my thumbnail in YouTube dark mode? +
Yes. Click the 🌙 Dark button in the Style tab to switch all preview contexts to YouTube's dark theme.
Can I add text directly on my thumbnail? +
Yes. Go to the Overlay tab and enter your text. You have full control over font size, weight, color, drop shadow, outline, background style, and 9-point position.
Does the tool upload my image to a server? +
Never. All processing happens entirely inside your browser. Your thumbnail images never leave your device.
Can I preview YouTube Shorts thumbnails? +
Yes. Click the ⚡ Shorts context to see a vertical grid preview of how your thumbnail appears in the YouTube Shorts shelf.
What is the safe-zone grid overlay? +
The safe-zone grid shows the inner 86% of your thumbnail that is always visible — the outer edges can be cropped on certain devices. Enable it in the Thumb tab to ensure your key visual elements are inside the safe area.