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Code Syntax Highlighter

Add syntax highlighting to code in 22 languages with 7 color themes, line numbers, and export to HTML

Paste code in any popular language and get a syntax-highlighted version ready to share, embed, or screenshot. The highlighter supports dozens of languages and multiple color themes. Whether you are preparing code for a presentation, a blog post, or documentation, the output looks polished and professional.

Runs in your browser and files never uploadedMore document & textJump to full guide

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Code Syntax Highlighter: a worked example

You are pasting a code sample into a slide deck and need it syntax-highlighted with a theme that survives a projector.

Snippet + settings

A TypeScript function · language auto-detected · high-contrast theme
Code Syntax Highlighter produces

Result

Tokenised, colour-coded HTML you can copy as rich text or export as an image.

Proper tokenisation colours keywords, strings, and identifiers distinctly, which is what makes code skimmable on a slide versus a wall of monochrome text. You can copy it as styled HTML for docs or export a clean PNG for decks, with theme choices tuned for projector contrast.

What is Code Syntax Highlighter?

Paste code in any popular language and get a syntax-highlighted version ready to share, embed, or screenshot. The highlighter supports dozens of languages and multiple color themes. Whether you are preparing code for a presentation, a blog post, or documentation, the output looks polished and professional.

How to use

  1. 1Paste your source code into the editor
  2. 2Select the programming language from the dropdown
  3. 3Choose a color theme
  4. 4Copy the highlighted output as HTML or take a screenshot

Key features

  • Support for 30+ programming languages
  • Multiple color themes (dark and light)
  • Line numbers with optional highlighting
  • Copy highlighted HTML for embedding in web pages
  • Automatic language detection as a fallback
  • Preserves indentation and formatting

Common use cases

  • Blog posts and tutorials

    Generate syntax-highlighted code snippets for technical blog posts where readability is important.

  • Presentations and slides

    Create visually appealing code slides by copying highlighted HTML or taking screenshots.

  • Documentation and wikis

    Embed properly highlighted code examples in project documentation or internal knowledge bases.

  • Code sharing in chats and emails

    Share readable, color-coded code snippets instead of hard-to-read plaintext blocks.

How Syntax Highlighting Works

Syntax highlighting works by tokenizing source code according to language-specific grammar rules, identifying keywords, strings, comments, operators, and other constructs, then applying color and style to each token category. This tool uses a battle-tested highlighting engine that covers languages from JavaScript and Python to Rust, Go, SQL, and more. You can switch themes to match your preferred editor look or your site's color scheme.

Frequently asked questions

Which languages are supported?

All major languages including JavaScript, TypeScript, Python, Java, C, C++, C#, Go, Rust, Ruby, PHP, SQL, HTML, CSS, Bash, and many more.

Can I use the highlighted output on my website?

Yes. Copy the HTML output and paste it into your site. The styles are inline, so no additional CSS is required.

Does auto-detection always pick the right language?

Auto-detection works well for common languages but can misidentify ambiguous snippets. Selecting the language manually guarantees correct highlighting.

Private by design

Your text is processed locally in the browser. Nothing you paste or open is transmitted or logged.