CSS Selector Tester & Visualizer

Test CSS selectors against custom HTML code blocks in real time. Instantly visualize matching elements and check query matches.

HTML Markup:

<div class="container my-4" id="main-shop">
    <div class="row g-3">
        <div class="col-md-4 product-card" data-category="electronics">
            <h5 class="card-title text-success">Wireless Headphones</h5>
            <p class="price-tag">$129.99</p>
            <button class="btn btn-sm btn-primary add-to-cart">Add to Cart</button>
        </div>
        <div class="col-md-4 product-card" data-category="apparel">
            <h5 class="card-title text-success">Running Shoes</h5>
            <p class="price-tag">$89.50</p>
            <button class="btn btn-sm btn-primary add-to-cart">Add to Cart</button>
        </div>
    </div>
</div>

CSS Selector Query:

Live Rendered Preview: 0 matches

Match Details Log:

No matches evaluated yet.

How to Use the Tester

Type or paste any valid HTML structure into the left-hand text area. Enter standard CSS selector expressions (such as classes, IDs, attribute selectors, or descendant combinators) into the query input field to instantly see matching elements highlighted in green inside the preview pane.

Frequently Asked Questions (FAQ)

Yes, structural pseudo-classes like :first-child, :last-child, and :nth-child() are fully supported by the browser's native query engine used within this tool.

Absolutely. All testing occurs entirely within your local browser sandbox via JavaScript; no HTML code snippets or queries are uploaded to any server.

CSS Selector Tester & Visualizer

How to Use the Tester

Frequently Asked Questions (FAQ)

Can I test pseudo-classes like :hover or :nth-child?

Is my data safe when testing selectors?