Code Highlighter
Paste code, select a language and theme, preview syntax highlighting and copy the output for documentation.
FreeBrowserAbout Code Highlighter
Preview a code snippet with a chosen language, theme and line-number setting. Copy the source or an HTML wrapper when preparing documentation and teaching material.
When to use this tool
- Prepare a readable code example for documentation.
- Check a snippet with a light or dark display theme.
Limits to know before using it
Highlighting does not execute or validate the code. A copied HTML wrapper may require matching styles or a compatible highlighter in the destination.
Data handling and cost
The main operation runs in your browser; tool input is not uploaded for processing. The site can still use session cookies and collect operational or usage data as described in the privacy policy.
Free to use in your browser, with no sign-in needed.
Frequently Asked Questions
It covers common programming, scripting, data, and markup formats including JavaScript, TypeScript, TSX, HTML, CSS, JSON, Markdown, Python, Go, Java, PHP, Ruby, SQL, Shell, YAML, and plain text.
No. Highlighting, theme changes, line numbers, word wrap, examples, and copy actions run locally in the browser. Your pasted code is not sent to the server.
Use Copy Code when you only need the original source snippet. Use Copy HTML when you want a pre/code wrapper that preserves the selected language, theme, and line-number preference for publishing workflows.