Diff Checker

What is the Diff Checker Tool?

The Diff Checker is a free online tool that compares two texts or code blocks and highlights the differences between them. It uses an advanced algorithm to detect additions, deletions, and modifications, displaying results in an easy-to-read side-by-side or inline format.

Why Use Our Diff Checker?

• Code Reviews: Compare different versions of code to spot changes quickly
• Document Comparison: Find differences between contract drafts, articles, or any text documents
• Debug Changes: Identify what changed between working and broken versions
• Version Control: Visualize git-style diffs without command line tools
• Plagiarism Detection: Compare texts to find similarities and differences

Key Features

• Side-by-Side View: Compare texts in two columns with synchronized highlighting
• Inline View: Unified diff format similar to git diff
• Color-Coded Changes: Green for additions, red for removals, yellow for modifications
• Line Numbers: Easy reference with line number display
• Similarity Score: Shows percentage of matching content
• Flexible Options: Ignore case, whitespace, or trim lines
• Swap Texts: Quickly reverse the comparison direction

How to Use

1. Paste your original text in the left panel
2. Paste your modified text in the right panel
3. Optionally enable comparison options (ignore case, whitespace, etc.)
4. Click "Compare" to see the differences
5. Toggle between side-by-side and inline views as needed

Understanding the Results

• Green (+): Lines that were added in the modified text
• Red (-): Lines that were removed from the original text
• Yellow (~): Lines that were modified (changed content)
• White: Unchanged lines that match in both texts

Frequently Asked Questions

Can I compare code in any programming language?

Yes! The diff checker works with any text, including code in JavaScript, Python, PHP, Java, HTML, CSS, and all other languages.

Is my data secure?

Absolutely. All comparison is done locally in your browser. Your text is never sent to any server or stored anywhere.

What is the maximum text size?

You can compare texts of virtually any size, though very large files may take longer to process.