Free Text Diff Tool
Compare two pieces of text and see the differences highlighted. Perfect for code review, document comparison, and tracking changes.
Compare Text
Paste text to compare
Enter original and modified text to see the differences highlighted.
How It Works
- Paste original text in the left panel and modified text in the right
- Green lines show additions in the modified version
- Red lines show removals from the original
- Toggle between unified and side-by-side view modes
- All processing happens in your browser - your text stays private
How to Use the Text Diff
Paste Your Original Text
Enter or paste the original version of your text into the left panel. This is your baseline text that you want to compare against. Works with any text including code, documents, or configuration files.
Paste Your Modified Text
Enter or paste the modified or updated version of your text into the right panel. The tool will compare this against the original to find all differences between the two versions.
Choose Your View Mode
Select between unified view (all changes in one column like git diff) or side-by-side view (original and modified shown in parallel columns). Choose the view that best suits your comparison needs.
Review the Highlighted Differences
Examine the color-coded results: green highlights show additions, red highlights show deletions, and unchanged text appears normally. Line numbers help you locate specific changes quickly.
Pro tip: Your data is processed entirely in your browser. Nothing is sent to any server, ensuring complete privacy.
About Text Comparison
Text diff tools are essential for developers, writers, and anyone who needs to track changes between document versions. Our tool uses the same algorithmic approach as professional version control systems like Git, providing accurate and efficient text comparison.
Common Use Cases
- Code Review: Compare code before and after changes
- Document Editing: Track changes in contracts, articles, or reports
- Configuration Files: Compare config versions to find differences
- Data Validation: Verify data exports match expected output
- Translation Review: Compare original and translated texts
Frequently Asked Questions
What is a text diff tool?
A text diff tool compares two pieces of text and highlights the differences between them. It shows which lines have been added, removed, or remained unchanged, making it easy to see what has changed between two versions of a document, code file, or any text content.
How do I compare two text files?
Simply paste your original text in the left panel and the modified version in the right panel. The tool will automatically analyze both texts and display the differences with color-coded highlighting: green for additions and red for removals.
What is unified view vs side-by-side view?
Unified view shows all changes in a single column, interleaving added and removed lines (like git diff). Side-by-side view shows the original and modified texts in two columns, making it easier to compare corresponding sections directly.
Is my text data secure?
Yes, all text comparison happens entirely in your browser. Your text is never sent to any server, ensuring complete privacy. You can even use this tool offline once the page has loaded.
Can I compare code files?
Yes, this tool works great for comparing code, configuration files, documentation, or any text content. The monospace font and line numbers make it particularly useful for code review and debugging.
What algorithm does this tool use?
This tool uses a Longest Common Subsequence (LCS) based diff algorithm, similar to what git and other version control systems use. It efficiently identifies the minimal set of changes between two texts.
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