Fontanello
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Fontanello

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

★★★★★ 4.6 47 reviews 60K+ users · Developer Tools
Runs on all sites

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.

Can act on Every website you visit
PermissionWhat it allows
activeTabAccess the current tab when you click the extension
contextMenusAdd 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

Version1.3.0
Download size16 KB
PlatformManifest V3
Needs Chrome109+
Interface languages Not translated

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.

ExtensionSite accessPermissionsUsersRating
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.