About Diff Checker
The diff checker compares two blocks of text and highlights every difference between them. Additions are shown in green, deletions in red, and unchanged lines provide context. Use it to compare code versions, configuration files, API responses, or any text content. The unified diff format shows changes clearly and is familiar to developers who work with version control systems.
How to Use
- Paste the original text in the left field.
- Paste the modified text in the right field.
- Click "Compare" to generate the diff.
- Review highlighted additions (green) and deletions (red).
Key Features
- ✓ Side-by-side text comparison
- ✓ Color-coded additions and deletions
- ✓ Unified diff output format
- ✓ Handle large text blocks
Common Use Cases
- • Comparing code changes before committing
- • Reviewing configuration file differences
- • Checking API response changes between versions
- • Verifying document revisions
Frequently Asked Questions
What is a diff?
A diff (short for difference) shows the changes between two versions of text. It identifies which lines were added, removed, or modified, using a standard format recognized by developers.
What do the colors mean?
Green lines indicate additions (text present only in the right/new version). Red lines indicate deletions (text present only in the left/original version). White lines are unchanged context.
Can I compare binary files?
This tool works with text content only. For binary file comparison, use specialized tools like hexdiff.
How large can the compared texts be?
The tool handles text blocks of reasonable size. For very large files (thousands of lines), it may be slower but still functional.