Advanced Diff Checker & Text Comparison 2

Follow these simple steps to compare your files:

1. Input Your Text: You have two main options for inputting your text. You can either copy and paste your content directly into the "Original Text" and "New Text" editor panels, or you can use the "Upload Original" and "Upload New" buttons to load files directly from your computer. You can also drag and drop files onto the respective editor panels.
2. Configure Your Comparison: Before running the comparison, you can tailor the settings to your specific needs:
   • Language: Select the programming language or text format for accurate syntax highlighting.
   • View Mode: Choose "Side-by-Side" for a parallel view or "Inline" to see changes integrated into a single view.
   • Comparison Level: Select "Line", "Word", or "Character" level diffing for different granularities.
   • Ignore Whitespace: Check this box to have the comparison algorithm ignore changes in spacing and indentation, which is useful for code.
3. Run the Comparison: Click the large "Compare Files" button. The tool will process the two inputs and display the differences in the diff viewer below, highlighting additions, deletions, and modifications.
4. Analyze the Results: The diff viewer will show you exactly what has changed. Use the "Previous" and "Next" buttons to jump between changes. The summary bar will show the total number of additions and deletions.

For Software Developers

Before committing code to a version control system like Git, developers often perform a final review of their changes. This tool is perfect for a quick sanity check, allowing you to paste your original code and the modified version to see a clear, highlighted diff. It helps catch unintended edits, debug issues, and write clearer commit messages.

For Writers and Editors

When collaborating on a document, tracking revisions is crucial. Whether it's an academic paper, a business report, or a creative story, you can paste different drafts into the diff checker to see precisely what has been added, removed, or rephrased. This is far quicker than manually scanning through long documents.

For Legal and Compliance Professionals

Contracts and legal documents undergo numerous revisions. Using the diff checker, you can compare two versions of a contract to ensure that only the intended changes were made. This helps prevent costly errors and ensures all parties are aware of every modification.

Is my data secure and private?

Absolutely. All processing happens entirely within your browser on your own computer. The text you paste or upload is never sent to our servers. This makes our tool completely private and secure to use, even with sensitive information.

What is the difference between line, word, and character comparison?

Line-level comparison is the default and shows entire lines that have been added or removed. Word-level comparison is more granular and will highlight individual words that have changed within a line. Character-level comparison is the most granular, highlighting individual character changes, which is useful for spotting typos or minor alterations.

What is the maximum file size I can compare?

The tool is optimized for performance and can handle large files, typically up to several megabytes, depending on your browser's capabilities. Since everything runs client-side, performance is dependent on your computer's memory and processing power.

What technology does this tool use?

This diff checker is powered by the Monaco Editor, the same code editor that powers the popular VS Code, providing a rich and responsive editing experience. The diffing logic itself is handled by a robust JavaScript library that implements well-known diffing algorithms, similar to those used in Git.