Text Diff / JSON Diff Comparison Tool

What is Text Diff?

Text Diff is a tool that compares two texts and visually displays the differences. Added lines are shown in green, deleted lines in red, making it easy to identify changes.

How does JSON Diff work?

In JSON mode, the tool first parses and formats the input JSON, then converts it to text for comparison. This allows accurate comparison of JSON objects even with different formatting.

When should I use this tool?

Main use cases:

• Code Review: Compare code before and after changes
• Config File Comparison: Check differences between environment configurations
• JSON Response Comparison: Verify API response changes
• Document Comparison: Track changes in text documents

Can I compare large texts?

Since this tool runs in the browser, very large files may cause performance degradation. It handles typical code files or configuration files (under a few thousand lines) without issues.

Can I save the comparison results?

Currently, the tool only displays results in the browser and doesn't provide a save feature. If needed, you can use your browser's screenshot function or copy the result text.

How does the comparison algorithm work?

This tool performs simple line-by-line comparison. It compares each line in order and classifies them as same, added, or removed. While simpler than advanced diff algorithms (like LCS), it's sufficient for most use cases.

Is my data safe?

Yes! All comparison operations happen only in your browser. Your input text is never sent to any server and is not stored anywhere.