EasyKit

Diff Checker

Compare two texts and see the differences highlighted. Perfect for code review and document comparison.

1
Additions
0
Deletions
2
Changes
Original (with differences)
1
function hello() {
2
console.log("Hello, World!");
3
return true;
4
}
Modified (with differences)
1
function hello(name) {
2
console.log("Hello, " + name + "!");
3
console.log("Welcome!");
4
return true;
5
}

Additions

Lines that exist in the modified text but not in the original.

Highlighted in green

Deletions

Lines that exist in the original text but removed in the modified version.

Highlighted in red

Changes

Lines that have been modified between the original and modified versions.

Highlighted in yellow

Tips

  • • Use Side-by-Side view to compare texts column by column
  • • Use Unified view to see all changes in a single list (like git diff)
  • • Click Swap to quickly reverse the original and modified texts
  • • Line numbers help you identify exact locations of changes
  • • Perfect for comparing code, configuration files, or any text documents

Frequently Asked Questions

What is the difference between side-by-side and unified diff views?

Side-by-side view displays the original and modified text in two columns, making it easy to compare line-by-line changes visually. Unified view shows all changes in a single column with color-coded additions (green) and deletions (red), similar to git diff output. Side-by-side is better for visual comparison, while unified is more compact and familiar to developers.

How does the diff checker identify and highlight changes?

The diff checker uses advanced text comparison algorithms to identify differences between two text inputs. It highlights added lines in green, deleted lines in red, and modified lines show both colors. The tool performs line-by-line comparison and can detect insertions, deletions, and modifications with character-level precision.

Can I use this diff tool to compare code files or configuration files?

Yes! This diff checker is perfect for comparing any text-based files including source code, JSON configurations, XML documents, CSV data, log files, and plain text. Simply paste the contents of your files into the original and modified text areas to see the differences highlighted with line numbers for easy reference.

What do the statistics (additions, deletions, changes) represent?

The statistics show a summary of changes: Additions are new lines added to the modified version, Deletions are lines removed from the original, and Changes represent the total number of modifications. These metrics help you quickly understand the scope of differences without reading through the entire comparison.

Is there a way to swap the original and modified text quickly?

Yes, use the Swap button to instantly exchange the contents of the original and modified text areas. This is useful when you want to reverse the comparison direction or when you accidentally placed the texts in the wrong order. The diff analysis updates automatically after swapping.

Does the diff checker work offline, and is my data secure?

Yes, this diff checker works entirely in your browser using client-side processing. Your text data never leaves your computer or gets sent to any server, ensuring complete privacy and security. You can use it offline once the page is loaded, making it perfect for sensitive documents and confidential code comparison.