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Code Syntax Highlighter

Automatically color-code JavaScript, Python, HTML and CSS syntax for readability.

600 dark:text-purple-400">function greet(name) {
  600 dark:text-purple-400">class="text-green-600 dark:text-green-400">// say hello
  600 dark:text-purple-400">return "Hello, " + name;
}

greet("World");

About Code Syntax Highlighter

Automatically color-code JavaScript, Python, HTML and CSS syntax for readability.

Code Syntax Highlighter automatically color-codes JavaScript, Python, HTML and CSS so dense code becomes scannable at a glance. Paste any snippet and keywords, strings, numbers, comments and tags each get a distinct color, making structure, nesting and typos stand out instead of blending into a wall of text. The output is ready to copy with the colors intact, which makes it handy for tutorials, documentation, bug reports and code reviews where a plain monospace block would be hard to follow. It handles mixed documents too, so an HTML file with inline styles and scripts keeps every language highlighted correctly. Code Syntax Highlighter is free, works in your browser without any account, and never uploads the code you paste.

How to Use Code Syntax Highlighter

  1. Paste your code, markup or configuration into the editor.
  2. Choose the output format or options offered.
  3. The formatted result updates live.
  4. Copy or download the finished code.

Key Features

  • Clean, consistently formatted output ready to paste.
  • Supports the common formats used in web development.
  • One-click copy and download — no build step required.

Frequently Asked Questions

Which languages does the highlighter support?

It highlights JavaScript, Python, HTML and CSS, including documents that mix them — for example an HTML page with embedded style rules and script blocks. Keywords, strings, numbers, comments and tags are colored separately, and the highlighted output can be copied with formatting preserved.

Is Code Syntax Highlighter free to use?

Yes. Code Syntax Highlighter is completely free with unlimited use — no account, download or payment required.

Is my data uploaded to a server?

No. Code Syntax Highlighter runs entirely in your browser. Your inputs are never sent to our servers or stored anywhere.

Does Code Syntax Highlighter work on mobile?

Yes. The interface is fully responsive and works in any modern browser on Android, iPhone, tablets and desktops.

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