Fontanello
Right-click any text to see its font, size, color, and contrast ratio.


What it does
Permissions and access
Taken from the extension's own manifest file inside the package. The store listing does not spell this out, so it is worth reading before you install.
| Permission | What it allows |
|---|---|
activeTab | Access the current tab when you click the extension |
contextMenus | Add items to the right-click menu |
Asks for these only when you use the matching feature:
clipboardWrite, offscreen
Requests 2 permissions — extensions doing the same job average 3.9.
Technical details
Description
Fontanello is a browser extension that reveals the typographic properties of any text on a webpage. By right-clicking on a word or phrase, you instantly see a popup displaying detailed CSS styling information. This tool is particularly useful for web designers, developers, and anyone curious about the fonts and styles used online.
Key Features
- Inspect Typography on Demand: Right-click any text element to view its typeface (font family), font weight, font size, color, and additional CSS properties like line height, letter spacing, and text decoration. This helps you understand how text is styled without diving into developer tools.
- Color Contrast Information: The extension calculates and displays the contrast ratio between the text color and its background. This is essential for accessibility compliance, as it helps you quickly check if text meets WCAG contrast guidelines for readability.
- Support for Multiple CSS Properties: Beyond basic typography, Fontanello shows less common properties such as font-style, text-transform, and font-variant. This gives a comprehensive view of the text's styling, useful for debugging or learning from existing designs.
With Fontanello, you can efficiently gather typographic data from any webpage without leaving your current context. Whether you're analyzing a competitor's site, checking your own designs, or learning how CSS works, this extension streamlines the inspection process. It works across all websites and does not require any configuration-just install and right-click.
Extensions that do the same job
Matched by what these extensions actually do, not by store category, and sorted so the ones asking for the least access come first.
| Extension | Site access | Permissions | Users | Rating |
|---|---|---|---|---|
| Fontanello — this page | All sites | 2 | 60K | 4.6★ |
| Figma | Limited | 4 | 200K | 4.2★ |
| GitZip for github | Limited | 2 | 100K | 4.1★ |
| IP Address and Domain Information | Limited | 1 | 100K | 4.4★ |
| Lightning Studio | Limited | 3 | 100K | 3.9★ |
| Pixel Measurement | Limited | 3 | 100K | 4.5★ |
| AI Code Finder, Alerts, Ask Questions about Papers: CatalyzeX | Limited | 3 | 50K | 4.8★ |
Want the same thing with less access? Figma, GitZip for github, IP Address and Domain Information ask for fewer permissions than this one.
Store data last checked August 14, 2026.