100tools
Text & Data

Code Highlighter

Paste or write code and preview clean syntax highlighting instantly.

Source Code238 chars
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Highlighted PreviewTSX / React
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Frequently Asked Questions

Which languages can Code Highlighter preview?

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.

Does this tool upload my code?

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.

What should I copy for documentation or slides?

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.