Code Syntax Highlighter
Highlight source code in 25+ languages with auto-detection and export standalone HTML with inline or embedded styles.
Runs in your browserCode → HTML
Loading tool…
Example
def greet(name):
return f"Hi {name}"<pre class="hljs"><code class="language-python"><span class="hljs-keyword">def</span> <span class="hljs-title function_">greet</span>(<span class="hljs-params">name</span>):
<span class="hljs-keyword">return</span> <span class="hljs-string">f"Hi <span class="hljs-subst">{name}</span>"</span></code></pre>How to use the Code Syntax Highlighter
- Paste or type your Code into the input area, or open a file from your device.
- Adjust the options above the editor if the tool offers any.
- Review the HTML result, then copy it or download it as a file.
Privacy and limitations
- Your data is processed on your device and is not uploaded to any server.
Frequently asked questions
How do I paste highlighted code into an email or document?
Choose "HTML with inline styles". Every colour is then written on the element itself, so it survives copy and paste without a stylesheet.
How accurate is auto-detection?
It scores the code against every supported grammar and picks the best match. Short snippets can be ambiguous, so pick the language explicitly when you know it.
Related converters
JavaScript Syntax HighlighterHighlight JavaScript code and export it as ready-to-embed HTML with GitHub light or dark colours.Python Syntax HighlighterHighlight Python code (functions, decorators, f-strings) and copy it as styled HTML for blogs and docs.HTML BeautifierBeautify HTML with Prettier: consistent indentation plus formatting of embedded CSS and JavaScript.JSON Syntax HighlighterHighlight JSON with coloured keys, strings, numbers and literals, exported as embeddable HTML.HTML Syntax HighlighterHighlight HTML and XML markup (tags, attributes, entities) and export escaped, styled HTML.CSS Syntax HighlighterHighlight CSS selectors, properties and values and export them as HTML for documentation.SQL Syntax HighlighterHighlight SQL queries with coloured keywords, strings and numbers, exported as embeddable HTML.Java Syntax HighlighterHighlight Java classes, annotations and generics and export them as styled HTML snippets.