Updated: 2026-07-11
Free online syntax highlighter. Convert code into syntax-highlighted HTML with line numbers. Supports JavaScript, Python, HTML, CSS, Java, C++ and more. Customizable dark/light themes. One-click copy highlighted HTML. Perfect for bloggers, developers, and technical writers. Client-side only.
Click "Highlight" to see result
How to Use the Syntax Highlighter
Using the Syntax Highlighter is straightforward:
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Enter Your Values
Input the required numbers and parameters into the calculator fields. Each field is clearly labeled — simply type your values or use the spinner controls to adjust them. -
Configure Options
Select any additional options such as computation mode, currency, time period, or precision level. The calculator updates automatically as you change values. -
View the Results
The calculated result is displayed instantly with clear formatting. You can Copy the result to your clipboard or adjust input values to see how different scenarios affect the outcome.