Text Highlighter Generator

Create CSS text highlight effects — marker, underline, box, strikethrough, and gradient sweep.

Style

Appearance

Color

Opacity60%

Height40%

Animate on scroll

Preview

Preview text (editable)

The Highlighted Text Example demonstrates this CSS effect in context.

Generated CSS

.highlight {
  background: linear-gradient(
    transparent 60%,
    #fbbf2499 60%
  );
  padding: 0 4px;
}

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What is this

What is the CSS Highlighter Generator?

Generate CSS text highlighter effects - marker underlines, background highlights, and animated reveal effects. Copy CSS that works on any text.

Everything runs locally in your browser. Adjust the controls above, preview instantly, and copy clean, production-ready CSS — no account, no upload.

How to use

Using the CSS Highlighter Generator

Everything lives in the panel at the top of this page. There is nothing to install — it all runs right here in your browser.

Choose highlight style

Pick full background, bottom underline, or diagonal slash. Select a colour - yellow (rgba(253,224,71,0.7)) is the classic marker colour.

Set coverage and position

Adjust background-size height percentage (how thick the highlight is) and background-position vertical percentage (how high on the text it sits).

Toggle animation

Enable animated reveal to get a highlight that expands on hover or on scroll. Copy both base and active state CSS.

The output

What the generated code looks like

Clean, production-ready CSS — no vendor bloat, no unnecessary declarations.

styles.css

/* Marker underline effect */
.highlight {
  background-image: linear-gradient(
    to right,
    rgba(253, 224, 71, 0.7),
    rgba(253, 224, 71, 0.7)
  );
  background-repeat: no-repeat;
  background-size: 100% 40%;
  background-position: 0 90%;
}

/* Animated reveal */
.highlight-reveal {
  background-image: linear-gradient(90deg, #fde047 0%, #fde047 100%);
  background-repeat: no-repeat;
  background-size: 0% 40%;
  background-position: 0 90%;
  transition: background-size 500ms ease;
}
.highlight-reveal:hover,
.highlight-reveal.active {
  background-size: 100% 40%;
}

background-position: 0 90% places the highlight at the bottom of the text line, matching how a physical marker would underline text.

Pro tips

Pro tips for better results

★

Use semi-transparent colours for a natural marker effect

rgba(253,224,71,0.7) gives a translucent yellow that shows the text through the highlight, like a real marker. Fully opaque highlights obscure descenders.

★

Background-size percentage height controls highlight thickness

background-size: 100% 40% means the highlight covers 100% width and 40% of the element height. Increase the second value to cover more of the text.

FAQ

Frequently asked questions

The background approach highlights the entire element box, not individual lines. For per-line highlighting on multi-line text, use the text-decoration approach or mark elements with a different background. The generator notes multi-line limitations in the output.

No. Everything runs in your browser. Nothing is sent to a server.