How to Use

Enter or paste the original text content into the “Side A” area on the left.
Enter or paste the target text for comparison into the “Side B” area on the right.
The system will automatically highlight differences in red (for deletions) and green (for additions).
Click the “Swap” button at the top to exchange the content of the two sides, and click “Download” to save the text locally.

Features

Real-time Difference Detection: Utilizing a high-performance editor engine, line-level and character-level comparison results are displayed instantly upon text input.
Bidirectional Synchronized Editing: Both left and right comparison windows support direct editing; differences are automatically re-calculated after modifications.
One-click Content Swap: Easily switch the positions of Side A and Side B, allowing you to review changes from different perspectives.
Privacy and Security Assurance: All comparison logic runs locally in your browser. NekoLabTools does not upload or store any of your text data.
Automatic Local Caching: The tool automatically saves the last compared content, ensuring no data loss even if you refresh the page or accidentally close the browser.

Q: Can this tool be used to compare code? A: Yes. Whether it’s code, manuscripts, or legal clauses, as long as it’s plain text format, it can accurately identify logical and character changes.
Q: Can the comparison results be saved? A: You can click the download icon in the operation bar to export the text content from either the left or right side as a .txt file.
Q: Is there a word limit for comparing long texts? A: The tool operates based on browser performance and supports processing long texts exceeding tens of thousands of characters, making it suitable for scenarios like contract proofreading and version change checks.