Free Source Code to PDF Converter Online 2026

Convert source code to beautifully highlighted PDF with line numbers and theme options. 100% private.

Code Editor

// Binary Search implementation in JavaScript
function binarySearch(arr, target) {
  let left = 0;
  let right = arr.length - 1;

while (left <= right) {
    const mid = Math.floor((left + right) / 2);

if (arr[mid] === target) {
      return mid; // Found the target
    } else if (arr[mid] < target) {
      left = mid + 1;
    } else {
      right = mid - 1;
    }
  }

return -1; // Target not found
}

// Quick Sort implementation
function quickSort(arr) {
  if (arr.length <= 1) return arr;

const pivot = arr[arr.length - 1];
  const left = [];
  const right = [];

for (let i = 0; i < arr.length - 1; i++) {
    if (arr[i] < pivot) {
      left.push(arr[i]);
    } else {
      right.push(arr[i]);
    }
  }

return [...quickSort(left), pivot, ...quickSort(right)];
}

// Example usage
const numbers = [64, 34, 25, 12, 22, 11, 90];
const sorted = quickSort(numbers);
console.log("Sorted array:", sorted);

const index = binarySearch(sorted, 25);
console.log("Found 25 at index:", index);

Settings

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Quality: High

Show line numbers

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About Our Free Source Code to PDF Converter

Our source code to PDF converter transforms programming source files into professionally formatted PDF documents with syntax highlighting — entirely in your browser. No code is uploaded to any server, ensuring complete privacy for your proprietary source code, scripts, and configuration files. The converter applies color-coded highlighting for keywords, strings, comments, numbers, and function names.

Whether you need to print code for a review meeting, create documentation with embedded source examples, archive code snippets for compliance, or submit programming assignments, this tool produces clean PDFs with optional line numbers and your choice of dark or light theme. The converter supports files from virtually every programming language including JavaScript, TypeScript, Python, Java, C, C++, Go, Rust, PHP, Ruby, Swift, and many more.

Key Features

Syntax Highlighting: Keywords, strings, comments, numbers, and function names in distinct colors
Dark and Light Themes: Choose a professional dark slate theme or a clean light theme for your PDF
Line Numbers: Optional line numbers with a separated gutter for easy reference
Multi-Language Support: Works with JS, TS, Python, Java, C/C++, Go, Rust, PHP, Ruby, Swift, and more
File Upload: Upload .js, .py, .java, .cpp, and 30+ other file extensions directly
100% Private: All processing happens in your browser — your code never leaves your device

For best results with long lines of code, consider using landscape orientation. The PDF preserves your indentation and formatting exactly as shown in the preview. Line numbers are rendered in a separate column so they do not interfere with copy-pasting from the preview.

Frequently Asked Questions

What programming languages are supported?

The syntax highlighter recognizes keywords from JavaScript, TypeScript, Python, Java, C, C++, C#, Go, Ruby, Rust, PHP, Swift, Kotlin, and more. It highlights common patterns like strings, comments, numbers, and function calls across all languages.

Is my source code uploaded to a server?

No. All processing happens entirely in your browser. Your source code never leaves your device. This makes the tool safe for proprietary code, internal scripts, and confidential projects.

Can I choose between dark and light themes?

Yes. The dark theme uses a slate background with bright syntax colors, ideal for screen-like output. The light theme uses a white background with darker colors, which is better for printing on paper and saving ink.

How do I disable line numbers?

Uncheck the "Show line numbers" checkbox in the settings panel. The PDF will then contain only the highlighted code without a line number column. You can toggle this on and off and see the change in the live preview.

What file types can I upload?

You can upload over 30 file types including .js, .jsx, .ts, .tsx, .py, .java, .c, .cpp, .cs, .go, .rb, .rs, .php, .swift, .kt, .html, .css, .sql, .sh, .yml, .xml, .toml, and plain .txt files. The maximum file size is 2 MB.

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