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How to Use Text Diff Tool - Developer's Guide

Step 1

Input Original and Modified Files

Add your original file content on the left and the modified version on the right. Our text diff tool supports multiple input methods:

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Paste code: Copy and paste your source code or text files directly
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Upload files: Load files from your computer for comparison
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Try sample: Click "Sample" to see example diff output
Step 2

View Diff Results

The diff tool instantly highlights all changes between your files:

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Red highlighting: Lines and characters removed from original
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Green highlighting: Lines and characters added in modified version
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Character-level precision: See exactly what changed, even within a line
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Side-by-side view: Compare files easily with synchronized scrolling
Step 3

Export and Share

Use your diff results for code review, documentation, or version control:

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Copy diff: Copy the comparison for code reviews or documentation
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Share link: Generate a shareable URL to collaborate with team members
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Download: Save the diff comparison for later reference

Frequently Asked Questions

What is a text diff tool and how does it work?

A text diff tool compares two versions of a file and highlights the differences between them. It shows added lines in green, removed lines in red, and provides character-level precision to show exactly what changed. This is the same technology used by version control systems like Git to show code changes. Our tool provides side-by-side comparison making it easy to review modifications, perfect for code reviews, documentation updates, and file comparison.

How is this different from Git diff?

Our text diff tool works similarly to Git diff but runs entirely in your browser without requiring Git installation or command-line knowledge. While Git diff requires a Git repository and terminal commands, our tool lets you simply paste any two texts and instantly see the differences. It's perfect for quick comparisons, code review, or comparing files that aren't in version control. The visual side-by-side interface makes it more accessible than Git's terminal output.

Can I use this for code review?

Absolutely! This text diff tool is perfect for code review. It shows exactly what changed between code versions with character-level precision, making it easy to spot modifications, additions, and deletions. You can share comparison links with team members, copy specific diffs for documentation, or download the comparison for reference. Many developers use it to review pull request changes, compare configuration files, or analyze code refactoring before committing changes.

What file types can I compare?

You can compare any text-based files including source code (JavaScript, Python, Java, C++, etc.), configuration files(JSON, YAML, XML, INI), documentation (Markdown, TXT), web files (HTML, CSS), scripts (Shell, PowerShell), and database queries (SQL). The diff tool works with any plain text content. For specialized comparisons, check out our JSON Compare tool for structured JSON data.

Is this diff tool secure for confidential code?

Yes, completely secure! All diff comparison happens locally in your browser using JavaScript. Your code never leaves your computer or gets sent to any server. We don't collect, store, or transmit any of your input files or comparison results. You can use the tool offline once the page loads. This makes it safe for comparing proprietary source code, confidential documents, or sensitive configuration files. Your data privacy is fully protected.

Can I generate patch files from the diff?

While our tool primarily focuses on visual comparison, you can copy the diff output for use in patch files or code reviews. The tool shows character-level and line-level changes that can be documented in your version control system, code review tools, or project documentation. The comparison format is similar to Git diff output, making it easy to communicate changes to your development team or include in commit messages.

Is this text diff tool free?

Yes, 100% free with unlimited comparisons! No registration, downloads, or fees. Compare as many files as you need with full character-level highlighting and side-by-side view. Perfect for developers, code reviewers, technical writers, and anyone needing file comparison. We also offer other free tools like Text Difference Checker, Compare Text, and Text Case Converter.

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