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Syntax Highlighter

Highlight code with Prism.js in multiple languages and themes.

Output
Click โ€œHighlightโ€ to see the result.

About this tool

Apply syntax highlighting to code snippets and export as styled HTML, PNG image, or RTF for Word documents. Supports 100+ programming languages and 20+ colour themes. Paste your code, choose a language and theme, and get highlighted output ready to embed in blog posts, documentation, presentations, and emails.

How to Syntax Highlight Code

  1. 1Paste your code into the editor.
  2. 2Select the programming language from the dropdown.
  3. 3Choose a colour theme.
  4. 4Preview the highlighted code in the output panel.
  5. 5Export as HTML (for web), RTF (for Word), or PNG (for images).

Frequently Asked Questions

How do I embed syntax-highlighted code in a blog post?+
Export as HTML and paste the styled HTML into your post's HTML editor. The inline styles work in any HTML-capable platform (WordPress, Substack, Notion, etc.). No external CSS dependencies required.
Can I use syntax highlighting in Word or Google Docs?+
Export as RTF format to preserve syntax colouring when pasting into Microsoft Word. For Google Docs, export as HTML and use the browser's Paste as Rich Text option, or take a PNG screenshot of the highlighted code.
What themes are available?+
Dracula, One Dark, GitHub Light, GitHub Dark, Monokai, Nord, Solarized (light and dark), Tokyo Night, Gruvbox, and many more. Preview themes instantly by clicking the theme name.
Is there a file size limit?+
There's no hard limit for syntax highlighting - it's purely text processing. Very large files (10,000+ lines) may be slower to process, but most code snippets highlight instantly.
What programming languages does the syntax highlighter support?+
Over 100 languages including JavaScript, TypeScript, Python, Rust, Go, Java, C, C++, C#, Ruby, PHP, Swift, Kotlin, SQL, HTML, CSS, SCSS, Bash, YAML, JSON, Markdown, Dockerfile, and many more. The language is detected automatically or can be set manually.
How do I copy code with syntax colours intact?+
Use the 'Copy as HTML' export to get styled HTML with inline colour styles that preserve highlighting when pasted into HTML-capable platforms like email clients, Notion, or Confluence. For plain text without colours, use 'Copy Plain Text'.
How do I embed syntax-highlighted code on a website?+
Export as HTML and paste the styled code block into your page. The output uses inline styles so it works without any external CSS. Alternatively, use a library like Prism.js or highlight.js in your site and apply a matching theme.
How do I switch between dark and light themes?+
Use the theme dropdown to switch between dark themes (Dracula, One Dark, Monokai, Nord) and light themes (GitHub Light, Solarized Light). Preview updates instantly. Choose the theme that matches your blog or documentation site's colour scheme.
Looking for a deeper guide on this topic? Browse the Searchlight blog.
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