Developer Utility
Code Diff Checker
Compare two blocks of code side-by-side and instantly see additions, deletions, and unchanged lines highlighted with color coding.
Original Code
Modified Code
Paste your code in both panels and click Compare Code to see the diff.
How Code Diff Works
ToolWise Code Diff Checker uses a line-by-line comparison algorithm. Each line of the original code is compared against the modified version.
- Green lines — Lines added in the modified version
- Red lines — Lines removed from the original
- Unchanged lines — Lines identical in both versions
Frequently Asked Questions
Is my code sent to any server?
No. All comparison happens entirely in your browser using JavaScript. Your code never leaves your device.
What programming languages are supported?
The diff checker is language-agnostic. It works with JavaScript, Python, Java, C#, HTML, CSS, SQL, JSON, YAML, or any plain text.
How is it different from git diff?
ToolWise Code Diff provides a visual side-by-side view without needing git, terminals, or any setup. Perfect for quick comparisons.