What Is Amino (amino.dev)? A Live CSS Editor for Any Website

Amino is a browser extension that lets you edit the CSS of any website in real time and keep those changes, so the site loads with your custom styling the next time you visit. It is aimed at people who want to restyle sites they don't own — building personal themes, skins, or small visual fixes — without touching the site's source code. The official description frames it as "a compact and powerful browser extension" for customizing any website with CSS that persists.

How Amino works

The core mechanism is straightforward: a browser extension injects your CSS into pages as they load, and an editor lets you write and preview that CSS live.

• Input: CSS rules you write in Amino's editor, targeted at elements on the page you're viewing.
• Action: the extension applies those rules to the live page immediately, so you see the result as you type.
• Persistence: the CSS is saved and re-applied on future visits, which is what separates Amino from a one-off DevTools tweak.

That persistence is the main difference from the browser's built-in developer tools. DevTools edits vanish on reload; Amino's are meant to stick.

What you can use it for

Because it works on any site rather than one platform, the use cases are broad:

• Personal themes and skins — restyle a site's colors, fonts, spacing, or layout to your taste.
• Readability fixes — enlarge text, widen columns, or hide elements that get in the way.
• Consistent look across sites — apply similar styling rules to several sites you use daily.

The site's own framing is "create your own website themes and skins," which matches this personal-customization angle rather than site-owner tooling.

What to check before relying on it

A few practical conditions matter:

• JavaScript must be enabled. The Amino page itself states the app "doesn't work properly without JavaScript enabled," so the editor depends on JS running in your browser.
• It edits presentation, not content or behavior. Amino is a CSS tool — it changes how a site looks, not what it does or what data it shows.
• Site changes can break your CSS. If a site redesigns its markup, selectors you wrote may stop matching, and you'll need to update them.

Amino vs. browser DevTools

If you only need a quick one-time check, DevTools is enough. If you want the change to be there every time you open the site, Amino is the fit.

Who it's for

Amino suits people comfortable with basic CSS who want durable control over how sites look to them. It is not a tool for site owners editing their own codebase, and it isn't a content blocker or automation tool. If your goal is "make this site look the way I want, every time," that's the problem Amino is built to solve.