Chrome Web Store Screenshot and Image Sizes

I read Google's Chrome Web Store pages on supplying images, filling in the store listing and creating a great listing page on October 26, 2026. I checked each size against all three pages.

Here's each image, what it's for, and the rules it has to follow.

The store listing has five graphic slots. Two are required, and three are optional.

Google's dashboard page lists all five in its Graphic assets section.

Each slot takes a set size. So build each file at that size from the start, instead of resizing at the last minute.

Google's store listing page is clear on this. Only the store icon and at least one screenshot are required.

The YouTube video, small promo tile and marquee promo tile are optional.

Optional doesn't mean unimportant, though. Google says good versions of both required and optional images raise your chances of getting noticed.

It also gives a hard example. Your extension can't be featured in the marquee unless you provide a marquee image.

The dashboard page adds one more note. It says the quality of your images can affect your item's prominence in the store.

Each screenshot must be 1280 x 800 or 640 x 400 pixels. Google prefers 1280 x 800, because larger screenshots look better on high resolution displays.

There's a catch. Google's images page says all screenshots are currently downscaled to 640 x 400.

So a 1280 x 800 file gets shrunk to half its width and height. Small text can turn hard to read.

Google suggests 640 x 400 in two cases. One is when your screenshots don't look good downscaled, for example with a lot of text. The other is when 1280 x 800 is too big for your extension, such as a low resolution game.

That page carries a 2018 update date, so check how your screenshots look in the live store too.

Both pages say the same thing. Screenshots need square corners and no padding. Google calls this full bleed.

Full bleed means the picture runs right to the edge. Don't add a white border, a drop shadow or rounded corners around the capture.

This is different from the phone screenshots many apps use, where a device frame sits on a colored background. Here, Google asks for the screen itself to fill the image.

If your extension lives in a small popup, it might look tiny in a 1280 x 800 shot. Crop and arrange the capture so the popup is easy to see, but keep the edges filled.

You need at least one screenshot. Google's advice is to add the maximum, which is five.

When you edit the listing, you can hover over a screenshot's thumbnail. That brings up controls to delete it or move it to a new position.

Put your strongest screenshot in the first position. It's the one people meet first.

Five slots go fast. Plan one main feature per screenshot, and skip near duplicates.

For help choosing what each slot shows, see our guide on how many screenshots to use. It's written for app stores, but the planning works the same way.

Google's listing guide asks for screenshots that show the actual user experience. Focus on the core features, so people know what to expect.

The screenshots should also match the latest version of the extension. Old screens that show removed buttons will confuse people.

The guide also suggests visual aids. Infographics, images and videos can explain onboarding and the main features.

Branding should match the rest of the listing. Your icon and promo images should look like they belong with your screenshots.

That way, people can link the screenshots to your extension at a glance.

The listing guide names a few things to avoid.

1. 1Blurry, distorted or pixelated screenshots, unless that look is part of your brand.
2. 2Screenshots that are upside down, sideways or skewed.
3. 3Overwhelming amounts of text.
4. 4Images that aren't sized correctly.

Text needs the most care, because of the 640 x 400 downscale. A caption that's easy to read at full size may be hard to read in the store.

Keep any words short and large. Let the screen itself do most of the explaining.

If you're unsure about the file type, our post on PNG or JPG for store screenshots explains the trade off.

The store icon is a 128 x 128 PNG. The images page says it goes inside the ZIP file of your extension.

The artwork itself should be smaller. For a square icon, Google asks for 96 x 96 pixels of artwork, with 16 pixels of transparent padding on each side.

That padding adds up to the full 128 x 128.

Other shapes get their own rules of thumb. A circular icon should be about 112 pixels across. For other squarish icons, make the artwork 75 to 80% of the image width.

The goal is even visual weight. Your icon shouldn't look bigger or smaller than the icons next to it.

The icon must work on both light and dark backgrounds. Google gives a few design tips.

1. 1Don't put an edge around the image, because the store might add its own.
2. 2Avoid large drop shadows. Small shadows for contrast are fine.
3. 3If the icon is mostly dark, add a subtle white outer glow.
4. 4Make it face the viewer, without dramatic perspective.

One more detail matters. If you upload an image with no alpha channel, it's placed in a frame with rounded corners, at a 12 pixel radius.

The listing guide adds that the icon shouldn't include screenshots or UI elements. Those details are very hard to see at small sizes.

The small promo tile is 440 x 280 pixels, as a PNG or JPEG. The listing guide says it appears on the homepage, on category pages and in search results.

It's optional, but skipping it has a cost. The images page says extensions without a small promo image are shown after extensions that have one.

That makes it the most useful optional image. If you add only one extra asset, make it this one.

Don't just drop a screenshot in. Google says promo images should communicate your brand and look professional.

A bold icon or symbol on a strong color usually reads better at this size than a busy scene.

The marquee promo tile is 1400 x 560 pixels, as a PNG or JPEG. It's used if your item is chosen for the marquee feature, the rotating carousel at the top of the store homepage.

You can't be featured there without it. Uploading one doesn't guarantee a spot, though. It only makes you eligible.

To raise your chances, the listing guide asks for a marquee that's uncluttered and high resolution. Its branding should match your other assets.

The wide shape suits a laptop or browser scene. Our guide to desktop browser mockups shows how to set one up.

Google gives the same rules of thumb for both promo images.

The images page also says to assume the image sits on a light gray background. White or light gray edges could blend into it.

Claims need the most care. The listing guide warns against anything that misrepresents your extension's status or performance in the store.

If your images refer to Google brands, Google says to follow its Branding Guidelines.

Promo images go through review before they show. You can see the status on the item's Edit page, in the Promotional Images section.

Google says images should be reviewed within one week from submission. A new upload goes straight back to Pending Review.

Draft and trusted tester items show no image status. You need to publish the item before a promo image can be approved.

If your extension is localized, you can add screenshots and a promo video for each locale. Each locale matches one of the locale folders in your extension.

You pick the language from a dropdown at the top of the store listing. Then you drop screenshots into the Localized screenshots section.

Promo images work differently. The small tile and the marquee can't be localized.

So Google suggests avoiding text on promo images, or aiming them at the locale with the most users.

By default, the store lists your extension in every region it supports. If you're aiming at one country, the Distribution tab lets you pick that region.

Screenshots for the Chrome Web Store should be real captures of your extension. Take them at 1280 x 800, with nothing around the edges.

Promo tiles are where a mockup helps. In our free mockup generator, you can drop a screenshot into a MacBook frame and add a gradient background. Keep any text to a minimum.

Check the export size before you upload. The tile is 440 x 280 and the marquee is 1400 x 560, so crop or resize to match.

Then run a final check. You want one icon, one to five screenshots, both promo tiles, and every file at its exact size.