What icon sizes does a Chrome extension need?

Chrome extensions need icons at 16×16, 32×32, 48×48, and 128×128 pixels. The 128px icon is used for the Chrome Web Store listing. The 16px and 32px icons appear in the browser toolbar and context menus.

What are the Chrome Web Store promotional image sizes?

The Chrome Web Store requires a Small Promo Tile (440×280), Large Promo Tile (920×680), and Marquee Promo Tile (1400×560) for featuring your extension in the store.

What format should Chrome extension icons be?

Chrome extension icons must be PNG format. The PNG can have transparency, which is useful for the toolbar icon to blend with any browser theme.

Are my images uploaded to a server?

No. All processing happens entirely in your browser using the Canvas API. Your images never leave your device.

How do I reference icons in a Chrome extension manifest.json?

In manifest.json, declare icons under the top-level 'icons' key for general sizes, and under 'action.default_icon' for the toolbar icon. Example: {"icons": {"16": "icons/icon16.png", "48": "icons/icon48.png", "128": "icons/icon128.png"}}.

Can Chrome extension icons be SVG instead of PNG?

No. Chrome extensions require PNG icons in manifest.json. SVG is not supported for extension icons. Always export your icons as PNG at the required pixel sizes before packaging your extension.

Chrome Extension Icon Generator — All Sizes for Web Store

Why Use This Tool?

Chrome extensions require icons at multiple sizes — from the tiny 16×16 toolbar icon to the 128×128 store listing icon. Additionally, the Chrome Web Store has three separate promotional image formats for featuring extensions in store categories. Getting all sizes right is required before you can publish or update your extension.

Chrome Extension Icon & Image Size Guide (2026)

Usage	Size (pixels)	Notes
Web Store Listing	128×128	Required for store submission
Browser Toolbar	48×48	Main extension icon
Context Menu / Management	32×32	Management page
Favicon Size	16×16	Smallest icon in menus
Small Promo Tile	440×280	Store promotional image
Large Promo Tile	920×680	Store promotional image
Marquee Promo Tile	1400×560	Featured in store marquee

Privacy First — 100% Client-Side

Your images are processed entirely in your browser using the HTML5 Canvas API. Nothing is uploaded to any server. You can verify this by disconnecting from the internet after loading the page — the tool works offline.

Tip: The 16×16 toolbar icon is what users see every day next to the browser address bar. Design it to be instantly recognizable at tiny sizes — a single letter, a distinctive symbol, or a simplified version of your logo. Avoid anything with text or fine detail that disappears at 16px.

Tips for Chrome Extension Icons

PNG with transparency is recommended for toolbar icons (16×32px) so they look good against any browser theme (light, dark, custom).
16×16 icon is your most visible asset — users see it on every tab. Make it distinctive and simple. Test it against both light and dark browser toolbars.
128×128 store icon represents your extension in search results and the management page. Keep it professional and consistent with your extension's purpose.
Promotional images are optional but significantly increase your extension's visibility in the Chrome Web Store. Use them to showcase your extension's key features.
Reference your icons in manifest.json under the "icons" field: { "16": "icons/icon16.png", "32": "icons/icon32.png", ... }.