Free Online Text Diff Checker and Comparison Tool
Compare two blocks of text and see the differences highlighted with HubKit's diff checker. Identify additions, deletions, and changes between two versions of text, code, or configuration files. Perfect for comparing code revisions, config file changes, or any text that needs a side-by-side comparison.
How to Use
Paste the original text in the left pane and the modified text in the right pane. The diff is calculated instantly, highlighting additions in green and deletions in red. Each changed line is clearly marked.
Features
- Side-by-side text comparison
- Color-coded additions and deletions
- Line-by-line diff calculation
- Works with code, prose, config files, and any text
Frequently Asked Questions
What diff algorithm does this tool use?
The tool uses a line-by-line diff algorithm that identifies the minimal set of changes between two texts, similar to the Unix diff command and Git's diff output.
Can I compare code files with this tool?
Yes. The diff checker works with any text content — source code, JSON, YAML, configuration files, prose, or structured data.
Is there a size limit for the compared texts?
The tool handles texts up to several thousand lines comfortably. Very large files may take a moment to compare, but typical documents and code files diff instantly.