New in Cascadea 2

READY FOR
macOS BIG SUR
Cascadea 2 features an overhauled user interface for macOS Big Sur, including redesigned iconography, a simplified but super-configurable Style Editor toolbar, and more. Cascadea 2 also runs natively on Apple silicon.

ENHANCED
EXTENSION
Now you can see what styles are active on the current page right from Cascadea 2's toolbar popover in Safari. Double-click an active style to open it right in the Style Editor. Plus, there's now significantly less "flashing" before your styles are first applied.

RANGE & NUMBER
VARIABLES
Cascadea 2 now supports UserCSS styles using "range" and "number" variables, giving you even more options for configuring your styles. Just drag the slider to adjust "range" vars, or use the stepper to change "number" values.
INTRODUCING CASCADEA

Customize Any Website
Cascadea is a Mac app and bundled Safari App Extension enabling you to use custom CSS rules to change the appearance or layout of just about any website. Whether you want to declutter a busy site, make a custom dark theme to soothe your eyes, prototype new CSS for a web app you develop, or just install styles that other people have made, Cascadea makes it easy to write, use, and share custom CSS.
POWERFUL CSS EDITING
For writing custom styles, Cascadea includes a powerful CSS editor based on the versatile Ace editor. With syntax highlighting, autocompletion, code folding, beautification, and more, Cascadea includes everything you need to write your custom CSS without needing a separate editor. Within a single style, you can also create sections with their own separate rules for which sites to affect, so one Cascadea style can contain unique CSS for different websites (or different parts of the same website).


CREATE
To get started, just create a new style in Cascadea, and tell it what website you want it to apply to. (You can add more sites from the Rule Editor later!)

WRITE
Then, use the Style Editor to write your custom CSS. Any CSS you write will be injected into the site you chose by Cascadea's built-in Safari extension.

ENJOY
Save your style In Cascadea, and watch your styles apply right in Safari. Your custom styles will automatically apply to the websites you specify every time you visit.
Don't know CSS? No problem - Cascadea makes it easy to install styles others have already written, too, both from popular user style websites or from .user.css and .user.styl files shared on places like GitHub. Just visit a compatible style in Safari and you'll be prompted to install it in Cascadea.

NATIVE
Unlike most browser extensions, Cascadea is built primarily as a fast, native application using Swift. Drag and drop your style list to reorder it, export and import files, sync your styles to iCloud, open multiple tabs in the Style Editor, use your Touch Bar, and more. Just as you'd expect from a native Mac app.

COMPATIBLE
Cascadea can import and export styles using the UserCSS standard, making it compatible with styles written in custom CSS extensions for other browsers. Easily bring over compatible styles with automatic updates, customizable variables, and support for the Stylus and Less preprocessor languages.

PRIVATE
Cascadea is committed to your privacy. Cascadea will never track your browsing history, inject websites with ads, ask you to download or install malware, or otherwise interfere with your browsing experience in any way you don't tell it to. Check the privacy policy for more details.