CSS Sticky Header Snippet
Generate a practical position sticky header recipe.
A reliable sticky header
A header that sticks to the top on scroll is a common request and a surprisingly common source of bugs — z-index issues, jumpy offsets, background gaps. This generator produces a solid position: sticky header recipe you can trust.
Starting from a working snippet avoids the usual pitfalls. Set the offset and copy the CSS, then apply it to your header so it stays put as the page scrolls without the layout glitches that hand-rolled versions often introduce.
Copy-ready sticky header
position: sticky needs a top offset and an ancestor that does not clip overflow, which is the usual cause of a header that will not stick. Generated in your browser.
Frequently asked questions
Why isn't my sticky header sticking?
Two common causes: a missing top value, or an ancestor with overflow: hidden, auto, or scroll, which makes that ancestor the scroll container instead of the page.
What is the top offset for?
It sets where the header stops, usually 0. Use a larger value if something else is pinned above it, such as a notice bar or the WordPress admin bar.
Why include a background and blur?
Without a background, content scrolls visibly under the header text. The semi-transparent background plus backdrop-filter blur keeps the header readable while hinting at the content below.
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