Styl

Styl, often branded as Styl, is a browser extension that enables users to customize the appearance of websites by applying user-defined CSS styles. It provides an interface for creating, editing, and organizing styles, which can be enabled or disabled on a per-site basis or globally. Users can import and export style collections, share styles via public repositories, and manage styles across devices when using a synchronized account.

The extension operates by injecting CSS rules into web pages after they load, allowing changes to colors, typography, layout, and other visual aspects without altering the site’s underlying code. Styles are typically targeted to specific domains or page paths, giving users fine-grained control over how sites look during their browsing sessions.

Historically, Styl arose in the context of browser-based user styling and is related to earlier projects that allowed customization of web appearances. Privacy and data handling have been a consideration in its ecosystem; discussions and forks emerged in response to concerns about data collection and telemetry in similar extensions. The Styl ecosystem includes privacy-conscious forks and alternatives, which emphasize local storage of styles and user-controlled sharing.

Availability spans major browsers, including Chrome and Firefox, with various forks and maintenance routes across platforms. Styl appeals to users seeking readability improvements, accessibility adjustments, or personal branding across websites. As with any browser extension that injects code into pages, users should review permissions, source credibility of shared styles, and potential page compatibility issues when applying stylized themes.