Thumbnail Safe Zone Previewer

How to use the Thumbnail Safe Zone Preview

1. Upload the thumbnail image you are about to use.
2. Look at it with YouTube's own overlays in place: the duration badge in the corner, the progress bar, and the crop that different placements apply.
3. Move text and faces away from anything that gets covered, then re-check before uploading.

When to use it

A thumbnail that looks perfect in an image editor can lose its headline under the duration badge, or have a face cut off in the small mobile card. Because the thumbnail is often the single biggest factor in whether anyone clicks, checking it against the real overlays takes a minute and avoids re-uploading after the first hour of views has already gone by.

What the overlays show

YouTube draws a duration badge in the bottom-right corner of every thumbnail, a red progress bar along the bottom once a viewer has started the video, and crops the image differently in the home feed, the sidebar, search results and the mobile app. The Safe Zones option outlines in red the areas that are covered or cropped in at least one of those placements; the dark mode toggle shows the card on YouTube's dark theme, where a dark thumbnail edge disappears into the background. The title and channel name fields let you see the card as a whole, because a thumbnail is never seen without its title.

Worked example

A thumbnail for "How I price my freelance work" with the words "MY RATES" in the bottom-right corner and the creator's face on the far left. In the preview, "RATES" sits under the duration badge and the face is clipped in the mobile card. Moving the text to the top-left and the face towards the centre fixes both; the dark-mode view then shows the light background merging into the card, so a thin darker border goes on. Two minutes in the preview, against the alternative of finding out from the analytics a week later.

Common mistakes

• Text in the bottom-right. That corner belongs to the duration badge.
• Faces at the edges. Square and vertical crops cut the sides; keep the subject in the middle 60%.
• Judging at full size. Most viewers see the thumbnail at a few centimetres wide; the preview is closer to reality than your image editor.
• Checking only light mode. A large share of viewers use dark mode.

When this tool is the wrong one

It previews an image you already have; it does not edit it. Cropping and resizing happen in your editor or the Bulk Image Resizer. To pull an existing thumbnail from a published video for comparison, the YouTube Thumbnail Downloader. Pricing the sponsored video the thumbnail belongs to is the Sponsorship Pricing Calculator's job.

Good to know

Keep essential text in the centre-left area and away from the bottom-right corner, use large type, and test at the smallest size you can bear to look at, because that is how most viewers see it on a phone. The image is previewed locally and not uploaded.