01
Unzip into your extension
Place the icons folder at the root of your extension, next to manifest.json.
Free tool
Chrome extension icon generator
Drop your logo or enter your website, and get the four PNG sizes Chrome requires, packed in a ZIP you can drop straight into your extension folder.
✓ 16, 32, 48, 128 px✓ Ready-to-use ZIP✓ Nothing is uploaded✓ Free, no account
Your source image
A square image of at least 512 pixels gives the cleanest result. PNG, SVG, JPG and WebP are accepted.
Drop your logo here
or click to choose a file
or
Your four icons will appear here.
To paste into your manifest.json
Your image stays on your computer. The resizing runs in your browser, nothing is sent to a server. Only the website lookup contacts us, and it reads nothing but the public favicon.
The icon sizes Chrome expects
Four sizes cover every place your extension appears. Missing one does not always block publication, but it leaves Chrome to upscale a smaller file, which looks blurry.
| Size | Where it appears | Required |
|---|---|---|
| 128 × 128 | Chrome Web Store listing and installation dialog | Yes |
| 48 × 48 | Extensions management page | Strongly recommended |
| 32 × 32 | Toolbar on Windows, and some favicon contexts | Recommended |
| 16 × 16 | Extension favicon and context menus | Recommended |
How to use the files
Three steps, once the ZIP is downloaded.
02
Declare them in the manifest
Copy the icons block shown above into your manifest.json, inside the top-level object.
03
Reload and check
Reload the extension from the extensions page and confirm the icon looks sharp in the toolbar, not just in the store listing.
FAQ
Quick answers about Chrome extension icons.
What icon sizes does a Chrome extension need?
Chrome uses 16, 32, 48 and 128 pixel PNG icons. The 128 pixel icon is the one required for the Chrome Web Store listing, and the 16 and 32 pixel versions are used in the toolbar and favicon contexts.
Is my image uploaded anywhere?
No. The resizing happens entirely in your browser with Canvas. The file you drop never leaves your computer. Only the optional website lookup contacts our server, and it only reads the public favicon.
What format should the source image be?
A square PNG or SVG of at least 512 pixels gives the best result. JPG and WebP also work. A rectangular image is centered rather than stretched.
Where do the icons go in my extension?
Unzip the icons folder at the root of your extension, next to manifest.json, then add the icons block shown on this page to your manifest.
Does Chrome accept transparent icons?
Yes. Transparency is supported and often looks better in the toolbar. A solid background is mostly useful when the logo has no margin of its own.
Icons done. What about the extension itself?
If you have the logo but not the extension, ExtensionFast builds a custom Chrome extension around your website and delivers the complete package by email.
Create my extension for $69 →