Since shouldiprefix.com is unfortunately down, I’ve compiled a practical list of CSS properties that may still need vendor prefixes based on current web development practices in 2026.

The need for prefixes has dramatically decreased. Modern browsers support most standard properties, and build tools like Autoprefixer handle the heavy lifting. However, for certain niche cases—like supporting very old browsers or writing simple demos without a build step—knowing which properties to prefix is still useful.

The Vendor Prefix Landscape in 2026

First, here are the four main prefixes you might encounter and the browsers they belong to:

The most important rule when writing prefixes by hand is to always list the standard property last. CSS reads top-to-bottom, so the last line (the standard one) will be used by any browser that understands it, while older browsers will use the prefixed versions they recognize.

.my-element {
        -webkit-property-name: value;
        -moz-property-name: value;
        -ms-property-name: value;
        -o-property-name: value;
        property-name: value; /* Standard property always last */
    }

Specific Properties That May Need Prefixes

Here are the properties where prefixes still appear in modern development, often for text effects, form controls, and specific browser quirks.

The Smart Approach: Automate with Tools

Manually tracking which properties need prefixes is tedious and error-prone. The recommended workflow for any serious project is to use a build tool.

1. Use a Build Tool: Most modern frameworks (like Vite, Next.js, or ones created with create-react-app) include this setup by default.
2. Integrate PostCSS and Autoprefixer: These tools automatically add or remove prefixes based on your project’s target browser support.
3. Configure browserslist: You define which browsers you need to support in your package.json file. For example:

{
      "browserslist": [
        "> 0.2%",
        "not dead",
        "not op_mini all"
      ]
    }

With this, you only write clean, standard CSS. The tooling handles the rest, ensuring your styles work across your specified browsers without you needing to memorize a single prefix.