Code Difference Checker
Compare code snippets online. Find differences between versions of your source code with syntax highlighting (coming soon).
What is a Code Difference Checker?
A code difference checker (or code diff tool) is a utility that compares two pieces of code and highlights the differences between them. This tool is essential for developers to track changes between different versions of their code, identify bugs, and collaborate effectively with team members.
Our Code Difference Checker offers an intuitive interface where you can paste or upload code from two sources and instantly see what has changed, line by line. Whether you're reviewing pull requests, tracking changes across versions, or debugging issues, this tool helps you visualize exactly what has changed and where.
Features of Our Code Difference Checker
Our free online Code Difference Checker includes several powerful features:
- Side-by-side comparison view
- Unified diff view
- Syntax highlighting for multiple languages
- Ignore whitespace option
- Ignore case sensitivity option
- File upload support for code files
- Copy and download diff results
- Completely browser-based (no server uploads)
How to Use the Code Difference Checker
Using our Code Difference Checker is simple:
- Paste your original code into the "Original Code" editor, or upload a code file by dragging and dropping or using the "Select file" button.
- Paste your modified code into the "Modified Code" editor, or upload a file using the same methods.
- Click the "Compare Code" button to generate a detailed comparison.
- View the differences in either "Unified" or "Side-by-Side" view, depending on your preference.
- Use the options to ignore whitespace or case sensitivity if needed.
- Copy or download the diff results for sharing or future reference.
The tool will highlight added lines in green and removed lines in red, making it easy to spot changes at a glance.
Frequently Asked Questions
Is my code secure when I use this tool?
Yes, absolutely. Your code is processed entirely in your browser and never sent to our servers. We don't store or see any of your code, ensuring complete privacy and security.
What programming languages does the tool support?
Our Code Difference Checker works with all programming languages and supports syntax highlighting for popular languages including JavaScript, TypeScript, Python, Java, C++, PHP, HTML, CSS, and many more.
Is there a file size limit?
Since all processing happens in your browser, the practical limits depend on your device's memory and processing power. For optimal performance, we recommend keeping files under 1MB, though many modern browsers can handle larger files.
How does the "Ignore Whitespace" option work?
When enabled, this option treats consecutive whitespace characters (spaces, tabs, line breaks) as a single space, and ignores whitespace at the beginning and end of lines. This is useful when comparing code that might have different formatting but identical functionality.