HTML Code Generator

Generate a <pre><code> code block with language class for syntax highlighting libraries — configure content, language, and attributes — and copy the HTML.

Last updated: May 21, 2026

Code content

Language

Sets class="language-*" on <code> for Prism / Highlight.js.

ID (on <pre>)

Class (on <pre>)

Wrap in <pre> (block code)

Generated HTML

<pre><code class="language-javascript">function greet(name) {
  return `Hello, ${name}!`;
}</code></pre>

Preview

function greet(name) {
  return `Hello, ${name}!`;
}

Client-Side Processing

Input Data Stays on Device

Instant Local Execution

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What is HTML Code Generator?

The combination of `<pre>` and `<code>` is the standard HTML pattern for displaying multi-line code blocks. `<pre>` preserves whitespace and line breaks; `<code>` provides the semantic "this is code" meaning. Syntax highlighting libraries like Prism.js and Highlight.js look for a `class="language-javascript"` (or similar) on the `<code>` element to determine which language to highlight.

For inline code within a sentence (not a block), use just `<code>` without `<pre>`. The HTML Code Tag Generator tool covers that case.

How to Use HTML Code Generator

Paste or type your code in the content area

Choose a language for the class="language-*" attribute

Optionally toggle off "Wrap in <pre>" for inline-only output

Add id or class to the <pre> element if needed

Copy the generated HTML

Common Use Cases

Tutorial authors embedding syntax-highlighted code examples in blog posts.
Developers generating code snippet markup for documentation pages.
Teams building component libraries with pre-styled code blocks.

Example Input and Output

A JavaScript code block ready for Prism.js highlighting.

Configuration

Language: javascript
Code: console.log("Hello, World!");

HTML output

<pre><code class="language-javascript">console.log("Hello, World!");</code></pre>

Privacy

All HTML generation runs in your browser. No data is sent to any server.

Frequently Asked Questions

Do I need to include Prism.js or Highlight.js myself?

Yes. This tool generates the correct class="language-*" markup that these libraries expect, but you must include the library stylesheet and script on your page separately. The generated HTML alone will not add colours.

Should I HTML-encode characters like < and > in the code?

Yes, in production you should escape < as < and > as > inside <code> blocks so the browser does not misinterpret them as HTML tags. This tool includes content as-is for clarity; add escaping when building server-rendered templates.

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