Code Diff
Compare two versions of code to find differences instantly. Supports 25+ languages with syntax highlighting, multiple view modes, and export options.
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Add this tool to your website with customizable styling
How to Use
Paste original code
Copy and paste your original code into the left text area. This is the "before" version you want to compare.
Paste modified code
Paste the modified version into the right text area. This is the "after" version with your changes.
Select programming language
Choose the programming language from the dropdown for better diff accuracy and potential syntax highlighting.
Choose view mode
Select Inline, Side-by-side, or Unified view depending on how you prefer to see the differences.
Review and export
Review the highlighted additions (green) and deletions (red). Navigate between changes and export as text, patch, or HTML.
Frequently Asked Questions
What programming languages does Code Diff support?
Code Diff supports 25+ programming languages including JavaScript, TypeScript, Python, Java, C++, C#, Go, Rust, Ruby, PHP, Swift, Kotlin, HTML, CSS, SQL, and more. The language selection helps optimize the diff algorithm and provides better syntax awareness for comparing code.
What are the different view modes?
Code Diff offers three view modes: Inline shows changes in a single column with additions and deletions highlighted, Side-by-side displays the original and modified code next to each other for easy comparison, and Unified uses the classic git-style diff format with + and - prefixes. Choose the mode that works best for your workflow.
Can I export the diff results?
Yes! You can export your diff in three formats: Plain text for simple sharing, Unified patch (.patch file) for applying changes programmatically with git or patch tools, and HTML with syntax highlighting for documentation or sharing with non-technical stakeholders.
What do the ignore options do?
Ignore Whitespace treats lines with different spacing as equal, useful when comparing code with inconsistent formatting. Ignore Case makes comparisons case-insensitive. Ignore Blank Lines skips empty lines when calculating differences. These options help you focus on meaningful code changes.